GLOINNT Solutions Pvt. Ltd.

Aircraft Maintenance
Manual
Study Material – Department of Training

GL_TR_TP_TRM_AMM_001
21/11/2020
Contents
1. Aircraft Maintenance Manual (AMM) Introduction ....................................................................... 2
2. Types of Aircraft Maintenance ....................................................................................................... 2
a) Light or Line Maintenance ......................................................................................................... 3
b) Heavy or Base Maintenance ...................................................................................................... 3
c) Shop or Component Maintenance ............................................................................................. 3
3. Aircraft Maintenance Manual ........................................................................................................ 4
4. PAGEBLOCK .................................................................................................................................... 6
5. PAGEBLOCK Assignment ................................................................................................................ 7
a) Description and Operations ....................................................................................................... 7
I. Description and Operations (D/O) Page Block 01................................................................... 7
b) Maintenance Procedure............................................................................................................. 7
II. Fault Isolation Page Block 02 .................................................................................................. 7
III. Maintenance Practices Page Block 03 ................................................................................ 8
IV. Servicing Procedure Page Block 04..................................................................................... 8
V. Removal /Installation & Deactivation /Reactivation Page block 05 ....................................... 8
VI. Adjustment/Test (A/T) Page Block 06 ................................................................................ 8
VII. Inspection/Check (I/C) Page Block 07 ................................................................................ 8
VIII. Cleaning and Painting Page Block 08 .................................................................................. 9
IX. Approved Repairs Page Block 09 ........................................................................................ 9
6. Standard Generalized Mark-up Language (SGML) ......................................................................... 9
7. WARNING, CAUTION and Note .................................................................................................... 12
8. Illustration.................................................................................................................................... 14
9. Aircraft Maintenance Task Oriented Support System (AMTOSS) ................................................. 14
10. Front Matter Content............................................................................................................... 15
11. Task Structure .......................................................................................................................... 17

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1. Aircraft Maintenance Manual (AMM) Introduction
AMM is the formal document which details the way in which all maintenance tasks carried out on an
aircraft shall be accomplished. This includes items such as lubrication system functional checks and
servicing of the airplane but, will not have detail about structural repairs and modifications.

The AMM contains the instruction for the on–aircraft maintenance necessary to ensure the
continued airworthiness of the aircraft. The AMM contains information required to service, repair,
replace, adjust, inspect and check equipment and system on the aircraft. These Tasks are normally
performed on the ramp or in the maintenance hangar.

The data contained in AMM is in general compliant with ATA Specification 2200 or S1000D,
information Standards for Aviation Maintenance and ASD-STE100 Simplified Technical English.

The actions required for maintaining an item in a serviceable condition including servicing, repair,
modification, overhaul, inspection and determination of condition is called as Aircraft maintenance.
Maintenance is the action necessary to sustain or restore the integrity and performance of the
airplane. Maintenance is the process of ensuring that a system continually performs its intended
function at its designed-in level of reliability and safety.

The AMM is performed in the following ATA Standard. Each ATA reference corresponds to an aircraft
system:
Aircraft general: ATA 00 to ATA 12
Aircraft Systems: ATA 20 to ATA 50
Structure: ATA 51 to ATA 57
Power plant: ATA 70 to ATA 80.

2. Types of Aircraft Maintenance

Aircraft Maintenance is that part of the process of aircraft technical activity which is conducted on
aircraft when it remains in the line maintenance or base maintenance environment. A hangar
environment may be available but is often not necessary.
The reasons for carrying out maintenance are neatly summarised by
1. Aircraft safety – airworthiness.
2. Keep aircraft in service – Availability, i.e. the aircraft can meet its schedule.
3. Maximise value of asset (airframe, engines and components) – of prime importance to the owner
or lessor.
Maintenance will consist of a mixture of Preventive and Corrective work, including precautionary
work to ensure that there have been no undetected chance failures.
In addition to the scheduled and unscheduled work, there will be inspection to monitor the progress
of wear out processes.

 Scheduled or Preventive work to anticipate and prevent failures

 The cost of maintenance action must be minimised.

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a) Light or Line Maintenance

This would typically include Pre-flight checks, Daily checks (before first flight), and scheduled
maintenance tasks as follows. According to EASA Part 145, AMC 145.A.10.
Line Maintenance includes:
 Trouble shooting
 Defect rectification
 Component replacement
 Scheduled maintenance or checks including visual inspections for to detect obvious failures
 Minor repairs and modifications which do not require extensive disassembly and can be
accomplished by simple means

b) Heavy or Base Maintenance

Base Maintenance may be referred to as Heavy (or Depth) Maintenance, and consists of tasks that
are generally more in-depth and long-lasting, but are performed less frequently.
An MRO company will have to have large facilities and specialised equipment and staff to undertake
base maintenance, and many operators conduct this function. The different activities may include:
 C and D Checks which will check for deterioration of the airframe, engines and systems, e.g.
corrosion, fatigue.
 Removal of defects – implementation of Service Bulletins (SB) and Airworthiness Directives
(AD), this can also be done during Line maintenance.
 Technology upgrade – fitting of Terrain Avoidance and Warning System (TAWS), Airborne
Collision Avoidance System (ACAS) etc.
 Cabin reconfiguration, painting etc.

C Check: This is performed approximately every 20–24 months or a specific number of actual flight
hours (FH) or as defined by the manufacturer. This maintenance check is involves a large majority of
the aircraft's components to be inspected.
D Check: This check is performed every six years and the entire aircraft is basically dismantled and
put back together. Everything in the cabin is taken out (seats, toilets, galleys, overhead bins) so
engineers can inspect the metal skin of the aircraft, inside out.

c) Shop or Component Maintenance

The third form of maintenance can be termed as Workshop maintenance. This covers maintenance
on components when removed from aircraft e.g. engines, APU, seats. Sometimes this is carried out
within the same organisation as the Base Maintenance, but sometimes special companies carry out
this work separately.

What do you mean by Maintenance Intervals schedules?

The intervals of maintenance are parameters set based on the Maintenance Planning Document
(MPD). These will be set according to different criteria, depending on how well damage can be
detected and failure predicted and carried out at periods related to time in service (e.g. calendar
time, number of cycles, and number of landings)

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What is on condition Maintenance?
At specific period, the Items are tested or inspected, to an appropriate standard to determine
whether it can continue in service is called as Preventative maintenance. Fundamental purpose of
On-Condition is to remove an Item before its failure in service.

Condition Monitoring: Here Information on Items gained from monitoring is collected, analysed and
interpreted on a continuing basis as a means deciding whether or not to implement corrective
procedures.

Categories in Maintenance Intervals are based on the following:

 Flight Hours (FH), for items that are in constant operation e.g. Fuel Pumps, Electric
Generators
 Flight Cycles (FC), for items operated once or twice per flight e.g. Landing gear, air starter,
brakes, hull pressurisations
 Calendar Time (Cal), for items exposed whether operated or not e.g. Fire Extinguishers,
Corrosion to Structure

3. Aircraft Maintenance Manual

The formal document which details the way in which all maintenance tasks carried out on an aircraft
shall be accomplished.
Aircraft maintenance is one of the most important activities that aircraft airlines and owners should
maintain and never underestimate. This is a set of activities that includes the inspection, reformation
and repair of an aircraft.
The rules in aircraft manuals set the standard for maintaining your aircraft in order to uphold
compliance. There are different airworthiness authorities in the world whose job is to make sure that
every owner is doing his part in maintaining the safety and good condition of his aircraft.

Why Aircraft Maintenance is Important?

Aircraft maintenance is highly regulated in every part of the world due to various reasons, including
but not limited to:
 Avoiding lost flights because of failure
If you want to make sure that everything is in its perfect condition, schedule regular aircraft
maintenance and replacement of damaged parts in accordance with aircraft performance
manuals from the relevant manufacturers.
 Maintaining good performance
Regular maintenance will ensure that the aircraft is serviceable for the time it flies.
Operational checks before every flight will make sure that failure does not occur before trip.
 Ensuring passenger safety

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 Passenger safety is the priority of any airline, and through regular maintenance and checks,
we will assure that the travel of those passengers will be undertaken in the safest and
smoothest way possible.
 Extending the life of the aircraft
Regular maintenance will extend aircraft life and ensure that aircraft will perform safely for
the expected period of time.
In order to effectively take preventative measures, aircraft should undergo different levels of
inspection through an aircraft maintenance schedule.
One should follow maintenance programs as detailed in aircraft manuals for all types of
aircraft (fixed-wing or rotor). However, all types of aircraft will have one standard
maintenance procedure, which you should carry out before every flight.

What are the Maintenance Checks and Scheduling Tasks?

Airline companies should have a qualified technical team to carry out this task. This team’s duty
includes ensuring the on-time delivery of all checks and scheduled tasks. This also requires their full
compliance with local authority airworthiness rules and regulations.
We at Airports World Company fully understand the importance of aircraft maintenance in the
aviation industry. With our qualified team of experts, we take hold of this task to maintain aircraft as
reflected in aircraft maintenance manuals and in compliance with the rules and regulations of our
General Authority of Civil Aviation (GACA) and with any other civil authority customers require.

What is the Significance of AMM?

An aircraft maintenance manual, also referred to as AMM in short is a document that provides detail
technical support information for a specific type of Aircraft.
The AMM is provided by the manufacturer to the operator. It comes in a leaflet format with
illustrations of various parts and components of the aircraft. It provides sufficient information on the
correct procedure of performing a maintenance task and also specifies the correct tools to be used
while performing it.

What is a Task and Sub task?

After you identify your main tasks, you need to divide them into discrete subtasks so that you can
provide usable step-level information. You divide the task of writing into its main subtasks, for
example, researching the material, drafting an outline, writing a first draft, and revising the draft.
Repeat the process of dividing tasks until you have groups of tasks for which you can provide step-
level information.
Keep in mind that the number of steps in each task and subtask should be nine or fewer.
Before you write task information, you need to know how the task is related to other tasks. You need
to understand the task sequences, levels of tasks, and Interdependencies. Do ascertain that the task
really a discrete task? Does it have subordinate tasks? Is it a subtask of a larger task? Is it a subtask of
more than one task?

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What are the Documents required for writing an AMM?
Documents required to write AMM are the Change Drivers like ModSums (Modification Summary),
Service Bulletin, User Comments, Request For Revision (RFR), Customer Originated Change (CoC).
Illustration mock up, Detail Drawing, Inspection requirements, Special tools required Special
procedure.

Description of maintenance
Explanation about system by, Function Operation Configuration & Control Sufficient information is
provided for the maintenance.
This manual contains the best operating instructions and procedures for the Aircraft under most
circumstances. The data of limitations, performance, and weight/ balance provided. Basic flight
principles are not included. THIS MANUAL SHALL BE CARRIED IN THE AIRCRAFT DURING ALL FLIGHTS.

Writing a procedure:
A procedure is an established method of accomplishing a task, usually with steps that are performed
in a prescribed order.

What is the definition of procedure?

The procedures are basically sequential actions that are designed to complete a task.
In the aircraft manual all operations can be broken down into categories called processes. These
processes are the building blocks for task procedures. They can implement the procedures to achieve
the task completion. Procedure means a group of sub tasks typically done in a standard order to
achieve a task.

4. PAGEBLOCK
What is a page block in AMM?
Page block is the frame work which contains unique task with a task number, task title and specific
maintenance procedure in a sequential order, which obeys the standards for content, structure &
layout of the process.

AMM Page block

Description and operation 001-099
Fault isolation 101-199
Maintenance practices 201-299
Servicing 301-399
Removal/installation 401-499
Adjustment/test 501-599
Inspection/ Check 601-699
Cleaning/painting 701-799
Approved repairs 801-899

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5. PAGEBLOCK Assignment
The information contained in the AMM has been divided into two main categories.
 Description and Operations (D/O) that is Page Block 01
 Maintenance Procedure (M/P) that is Page Block 02 to 09

a) Description and Operations

I. Description and Operations (D/O) Page Block 01

The Purpose of the D/o is to familiarize Maintenance personnel with Aircraft.

a. System/component Description
b. Power supply(If applicable)
c. Interface with other systems (If applicable)
d. Operations/control and Indicating
e. BITE Test

b) Maintenance Procedure
The MP includes the instructions and data necessary for:
 Maintenance Planning Document tasks
 Removal /Installation of Line Replaceable Units and Items
 Task called up in Aircraft Fault Isolation (AFI)
 Other line Maintenance Tasks (Cleaning, Servicing, and Inspection/Check after abnormal
operation of the aircraft)

Maintenance Practice are organised by groups of similar tasks (Eg., like Removal Installation)
Identified by Manuals sequence Numbers follows:

 Maintenance Practices
 Servicing
 Removal/Installation (LRU)
 Testing and Adjustment
 Inspection/ Check
 Cleaning and Painting
 Repair

II. Fault Isolation Page Block 02

General fault Isolation is covered in AMM, detailed and Fault isolation is covered in Fault
Isolation Manual (FIM).

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III. Maintenance Practices Page Block 03
These topics are used for procedure which provides general maintenance Practice
Procedures such as:
a. Aircraft Jacking
b. Aircraft Levelling
c. Application of electrical, pneumatic, Hydraulic power
d. Opening /closing of engine cowling, MLG doors Etc…
e. Installation of complex safety devices

IV. Servicing Procedure Page Block 04

These topics cover servicing procedure. They give information on all operations with fluids:
Fuel, Gas, Oil, Water, Sanitary fluids Etc. Uploading and downloading procedure for
software’s.

V. Removal /Installation & Deactivation /Reactivation Page block 05

This topic provides all data necessary for removing, Installation or replacing a component.
These procedures are composed of two independent tasks, one for the for removal and one
for the installation.

VI. Adjustment/Test (A/T) Page Block 06

o Operational Test:
This test is required to ascertain only that a system or unit is operational. This test
normally does not require special equipment or facilities other than that installed on
the aircraft and are comparable to the test performed by the flight crews.

o Functional Test:
This test required to ascertain that a system or unit is functioning in all aspect in
accordance with minimum acceptable system or unit design specifications
This test requires supplemental ground support equipment and is more specific and
detailed than an operational test.

o System Test:
This test contains all adjustment specifications and tolerances required to maintain
system and /or performance at maximum efficiency and design specifications.

Built In Test Equipment (BITE)

This is a mechanism that permits a machine to test itself. This is to meet
requirements such as: high reliability. Lower repair cycle times.
BITE primarily refers to passive fault management and diagnosis, more specifically, in
reference to the individual tests.
BITE is part of a system that monitors the correct functioning of that system. It
produces an alert if part of the system fails to fulfil its function.

VII. Inspection/Check (I/C) Page Block 07

Inspection check is divided into two parts,

I/C without removal of components from the aircraft.

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 Without components removal checks like: Visual Checks (cracks, damage, oxidation, paint, etc.)
Measurement, displacement, travel, overall clearances, leak measurements, etc.

I/C further to the removal of components from the aircraft.

With component removal, like Original manufactures dimensions, maximum and minimum
clearances, leak measurements, etc.

Different types of Inspection are

 Detailed Inspection (DI)

An Intensive examination of a specific items, installation or assembly to detect damage,
failure, or Irregularity. Available lighting is normally supplemented with a direct source of
good lighting at an intensity deemed appropriate. Inspection aids such as mirrors,
magnification lenses etc. may be necessary. Surface cleaning and elaborate access procedure
may be required.

 Special Detailed Inspection (SDI)

Here the examination is likely to make extensive use of specialized inspection techniques or
equipment. Intricate cleaning and substantial access or disassembly procedure may be
required.

VIII. Cleaning and Painting Page Block 08

Procedures which require special precautions (parts contaminated by hydraulic fluid, battery
acid, etc) are included in the relevant chapter.

IX. Approved Repairs Page Block 09

This topic provides repair procedures with the expectation of those covered by the CMM
manual or SRM Manual.
Repairs included in that Aircraft maintenance manual are non-structural repairs that can be
performed on the aircraft.

6. Standard Generalized Mark-up Language (SGML)

Standard Generalized Mark-up Language (SGML) is a text mark-up language that serves as a superset
of widely used mark up languages like HTML (hypertext mark-up language) and XML (extensible
mark-up language).

SGML is used for marking up documents and has the advantage of not being dependent on a specific
application. It is derived from GML (generalized mark-up language), which allowed users to work on
standardized formatting styles for electronic documents.

What does Hypertext Mark-up Language (HTML) mean?

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Hypertext mark-up language (HTML) is the major mark-up language used to display Web pages on
the Internet. In other words, Web pages are composed of HTML, which is used to display text, images
or other resources through a Web browser.
All HTML is plain text, and may be read by humans. The file extension for an HTML file is .html.
HTML is not programming language it is actually a mark-up language. HTML is used with other
technologies because all HTML really does is organize documents.
XML stands for Extensible Mark-up Language. It is a text-based mark-up language derived from
SGML. XML tags identify the data and are used to store and organize the data, rather than specifying
how to display it like HTML tags, which are used to display the data.
Stands for "Document Type Definition." A DTD defines the tags and attributes used in an XML or
HTML document. Any elements defined in a DTD can be used in these documents, along with the
predefined tags and attributes that are part of each markup language.

The following is an example of a DTD used for defining an automobile:

If the DTD is declared inside the XML file, it must be wrapped inside the definition:
<?xml version="1.0"?>
<!DOCTYPE note [
<!ELEMENT note (to,from,heading,body)>
<!ELEMENT to (#PCDATA)> <!ELEMENT
from (#PCDATA)> <!ELEMENT heading
(#PCDATA)> <!ELEMENT body
(#PCDATA)> ]>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend</body>
</note>

The DTD above is interpreted like this:

 !DOCTYPE note defines that the root element of this document is note.
 !ELEMENT note defines that the note element must contain four elements: "to, from,
heading, body".
 !ELEMENT to defines the to element to be of type "#PCDATA".
 !ELEMENT from defines the from element to be of type "#PCDATA".
 !ELEMENT heading defines the heading element to be of type "#PCDATA".
 !ELEMENT body defines the body element to be of type "#PCDATA".

The above example is a basic DTD that only uses a few data types. Document type definitions used
for large XML databases can be thousands of lines long and can include many other data types.
Fortunately, DTDs can be easily modified in a text editor whenever changes need to be made.
Another important characteristic of standard generalized markup language is its use document type
definition (DTD). A particular document type is expected to have specific parts and a specific
structure. For example, when there is a DTD for a report, the portions and structure of the document
should follow what is defined in the DTD for it to be considered a report. One major benefit is that
documents with the same type can be processed uniformly by all software capable of processing
them.

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Summary of SGML
o This is an international standard for document interchange.
o Prescribes a standard format for embedding descriptive mark up within a document.
o Specifies a standard method of describing the structure of a document.
o Supports a infinite variety of document structures.
o Allows you to create documents which are independent of any hardware or software.
o Is portable.
o Is human and machine readable.

Who created SGML?

SGML was recognised as standard by the International Organisations for the Standardisation.(ISO),
which comprises representatives from the following group:
o US department of Defence.
o The Gen code committee for graphics communication association.
o Working group within the American National Standards Institute Text and office system
initiatives.
Who is using SGML?
o ATA, Telecommunication Industries, US Securities Registrations.
o Society of Automotive Engineers, World Wide Web (WWW).
o Novell, Silicon Graphics, Microsoft.

Benefits of SGML

o Processor Independent.
o Multiple presentation of same information.
o Sharing and reusing of the common information.
o Automation, Consistency of format.

How does SGML affect you?

o Authors will do the best they can give in creating information.
o Authors will spend less time in preparing documents for different out puts formats.
o Authors’ uses less time in recreating the standard, instead he can re-use the data in the
documents.
o Standard components of documents can be created once, and automatically supplied in your
documents

What are SGML Document Components?

 Content
 Structure
 Layout
 Content is the information itself, content include titles, paragraphs, lists, table, graphics.
Content is supplied between mark up.

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  Structure defines the structure in the document. Gives the relationship between the
elements.
EX, Chapter heading must be the first element after start of the chapter.
 Layout will Defines the Style of your content. Like font style, font type.

IMPORT and EXPORT to SGML

Importing and Exporting SGML with Frame Maker 7 describes the process of moving documents
between their SGML and structured Frame Maker representations.
It covers importing SGML documents into structured Frame Maker and exporting structured Frame
Maker documents to SGML as well as automatic creation of an EDD from a DTD and a DTD from an
EDD.
Element Definition document (Frame Maker+SGML documents)

SGML Import/Export Preliminaries

 Comparing SGML and structured Frame Maker documents
 Opening and importing SGML documents
 Exporting to SGML
 Converting multiple documents
 Renaming elements for export
 Naming graphics entities in structured Frame Maker
 Modifying SGML representation of graphics
 Creation and revision of the sample topics.

7. WARNING, CAUTION and Note

You can hurt or at least drive your readers crazy if you neglect the following three components of a
technical document:
 Note
 Cautions
 Warnings

A Note is the least severe of all these three prompts. There is no risk of system failure or any damage
to the system.
A Note is a helpful hint, sometimes a tip, to help the user work more efficiently. Without a note, a
user may lose precious time and get frustrated while trying to understand why something is not
working.

You can prevent that by adding a note like the following:

For example: “NOTE: Make sure the system is turned on and running for at least 7 minutes before
you slide Lever R4 from right to left.”

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By this note user will come to know that he needs to wait for 7 min at least before moving the slide
lever R4 from right to left.

A Caution is a more serious prompt.

AN OPERATING PROCEDURE, INSPECTION, REPAIR OR MAINTENANCE PRACTICE, WHICH IF NOT
STRICTLY OBSERVED, COULD RESULT IN DAMAGE OR DESTRUCTION OF EQUIPMENT.
Caution explains hazards that could damage a product, including data loss.
For example: “CAUTION: if you do not obtain prior permission from the site manager to conduct an
inspection you can be sued for trespassing and criminal conduct.”

A Warning is the highest level of alert. This is serious stuff!

AN OPERATING PROCEDURE, INSPECTION, REPAIR OR MAINTENANCE PRACTICE, WHICH IF NOT

CORRECTLY FOLLOWED, COULD RESULT IN PERSONAL INJURY, OR LOSS OF LIFE.

A Warning explains dangers that might result in personal injury or death.

For example: WARNING: Removing the capacitor C125 without first grounding the motherboard
may lead to electrocution and death!

What care you need to consider for writing caution and warning
 Start with a simple, clear command.
 Write to the intended audience, for example a machine operator or a maintenance
technician.
 Choose your words to be specific, leaving nothing to uncertainty.
 If conditions are necessary before starting a procedure, list the conditions first.
It might be necessary to add an explanation to make the risks clear. This will make the warning or
caution longer, but more effective.
Warnings and cautions should not be buried in the text. They should have headings and graphics to
grab the reader’s attention.

For example:
When performing maintenance, the safety must be always considered. Always use proper personal
protective equipment, at least but not limited to:
 Wear protective gloves when handling with chemicals and sealants. Do not use protective
hand creams as they can contaminate the sealants and surfaces.
 Wear goggles, safety glasses or face shield for eye protection.
 Do not wear loose clothing and secure long hair to prevent them from becoming tangled in
power tools.
 Wear ear plugs or muffs to protect your ears.
 Wear suitable protective shoes with non-slip soles.

For example:
Prior to performing maintenance or repair consider following general rules:

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  Check that emergency parachute system actuator is locked.
 Check that MASTER SWITCH and IGNITION is set OFF.
 Disconnect the negative terminal from the battery.
 When working with a landing gear, properly support the aircraft with jacks. Do not work
under aircraft unless it is properly supported.
 While the engine is running, keep away from the propeller.

8. Illustration

“A picture is worth a thousand words”

It is very often necessary to provide a graphical representation in order to convey information that
cannot be conveyed by text alone. This might be flowcharts, functional or circuit diagrams, as well as,
importantly, physical views. The use of graphics, rather than text, can also reduce the need for
translation in multilingual publications.

Sometimes, our customers choose to use photographs to provide views of physical items. Technical
illustrations also perform an essential role in conveying information about assembling and
disassembling equipment and identifying individual components of an assembly by means of an
exploded view.

Following are the Input documents for the Illustration

Illustrations are designed, based on authors mock up, with tools like Photoshop, Adobe illustrator,
Product View, Tech Illustrator according to the latest standards. Illustrated parts list with figure. Blue
print, change driver, detail items drawing.

9. Aircraft Maintenance Task Oriented Support System (AMTOSS)

AMTOSS is a numbering system designed to further improve the organization of the technical
manuals and to facilitate and standardize automated data retrieval. Numbering system used in ATA
Ispec 2200.
TOSS numbering system is divided into 3 groups:
 Maintenance Task Oriented Support System (M-TOSS)
 Aircraft Maintenance Task Oriented Support System (AM-TOSS)
 Jet Engine Maintenance Task Oriented Support System (JEM-TOSS)
AMTOSS numbering system has seven (7) elements.
 First Element – System/Chapter
 Second Element – Sub-system/Section
 Third Element – Units of Subsystem/Subject
 Fourth Element – Fourth element is called as functional code
 Fifth Element – Fifth element is called unique or sequential identifier. It is provided to create
unique numbers for all tasks and subtask which are similarly numbered through the first four
elements. Task number is numbered from 801-999 and subtask numbered from 001-800.

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  Sixth Element – Sixth element is called as configurationally code. That is it gives the
difference in methods/techniques of the Task accomplishment.
 Seventh Element – Seventh element is called as customer code.

10. Front Matter Content

1. Table of Contents
2. List of Effective Pages
Use this page(s) to determine current revision and effective date for each page in the
Maintenance Manual. As revisions are issued this list of effective pages will be amended.

Page Revision Date

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 3. Highlight of Revisions
This gives the information about the description of change cause due to change drivers and
the chapters effected.

Revision Revision Date Chapter Description

Initial release of the
IR 07/31/2009 ALL Entire Manual 135A-
970-100

4. Record of Revision
Use this checklist to record and control of all of the revisions you put in this Airplane
Maintenance Manual (AMM). Put the affected pages of the revision into the AMM as soon as
you get them. Remove and destroy the pages which are superseded. Complete the table
below when you have put the revision in the AMM.

Revision on Date issued Inserted date Inserted BY

Rev 87 20-Jan-79 18-Feb-79 John pul

5. List of Service Bulletins

Service Bulletin List gives the Inform of Service documents and technical information are
incorporated in this edition the chapters, Section & subject affected by the incorporation of
the Service bulletin are documented.

Service Bulletin Subject Section title Affected Chapters

SS1-10-001 Alternator Fuse Electrical power Chapter 24

6. Table of Chapters

Chapter Description Page

1 Introduction 01-01
3 General Description 03-01
4 Airworthiness Limitations 04-01
5 Time Limits/Maintenance Checks/Inspection Intervals 05-01
6 Dimensions and Areas 06-01
7 Lifting and Jacking 07-01

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11. Task Structure

1. Task should have the AIRCRAFT effectivity information.

Ex.: Aircraft Effectivity: 0001 to 9999

It is the series/band of the aircraft tail number, which comprises the similar set of change embodied
to the aircraft by the virtue of Change driver.
2. TASK NUMBER: It is 7 digit AMTOSS numbering system.
3. TASK TITLE: It is the main title of the Page block, which indicate task been performed.
4. WARNING: This will be the Ideal working configuration of the AIRCRAFT for which it facilitates
ideal condition for the maintenance practice to perform.
5. Reason for the JOB: Self Explanatory.
6. Job setup information: This will include the necessary Fixtures tool and Equipment made use
during the performance of the TASK.

 Fixture, tools, and special equipment Table

Gives the necessary Tools and Equipment are made use during the performing the
above task

REFERENCE QTY DESCRIPTION

12H-543-12" 2 Torque wrench

 Work zones and access panels

Aircraft is divided into 08 zones to facilitate the operator to know which area he
should attend for the assigned maintenance work. For achieving the accessibility for
work area, if any of the panels, doors are associated, immediately they need to be
removed to continue the job. Such panels are been listed in the table.

ZONE ACCESS/PANELS AREA

500 Left Wing
Servo panel left Wing Bottom Tailing edge

 Reference Information
These are the sub task been called during the performance of the main task this will
only facilitate in accomplishing the Main task.

TASK REFERENCE DESIGNATION

Energize the Ground Service Network
24-42-00-861-001-A from the External Power

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 7. Job –Setup Subtask
This will inform you about the safety precaution that need to be look into before you start
the maintenance job on the aircraft.
8. Subtask - Open, safety and tag these circuit breaker
These gives the safety precautions in the form of plug card, this inform the other co
technician to be alert before switching the circuit breaker switches

PANAL DESIGNATION FIN LOACTION

121VU APU/APU/CTL 2KD L42
121VU APU/ECB/SPLY 1KD L41

9. Subtask - Get access

Here the technician is informed about the doors or panels which are needed to be removed
during the maintenance process just to facilitate the reachability of the workable area.

10. Procedure Writing

This is the step by step arrangement of the Maintenance Instruction in the logical sequence
that summarise the maintenance on aircraft.

 WARNING
This gives you the system safety warnings that to be followed during the process, this to
be written before Starting of the procedure.
 Illustration Linkage
All the procedure is written along with the Illustration which matches the procedures.
Once the changes in Illustration are done by Illustrator, that link is to be linked for the
procedure.

NOTE: During the Installation process, two Information need to be added to the installation
task, they are as follows:
o Consumable Table: this consist the details of the consumable that are been used in the
task during the installation process.
o Close up: this to indicate the conclusion of the maintenance task. Before leaving the work
zone, one should ensure that the work area is clean and clear of tool(s) and other items.
Close all the doors and panels removed/opened for access.
Remove the access platform(s).

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