MAINTENANCE MANUAL 72-00-00 - ENGINE- CLEANING

Manual Part No.3017042 Rev. 52.0 - 15/APR/19

72-00-00
Engine Model(s): MODEL(S)PT6T-3/PT6T-3B/PT6T-3BE/PT6T-3BF/PT6T-3BG

ENGINE- CLEANING
1. General
A. Personnel involved in maintenance practices should refer to Chapter 70-00-00, STANDARD
PRACTICES to familiarize themselves with general procedures.
B. For additional information regarding Special Tools and Fixtures, Equipment, and Consumable
Materials referred to in this section, refer to section TOOLS/FIX/EQUIP or CONSUMABLE
MATERIALS respectively.
2. Consumable Materials
The consumable materials listed below are used in the following procedures.

Item No. Name Remarks

PWC05-005 Emulsifier Witconate P10-59B
PWC05-037 Epoxy Primer

PWC09-003 Silicone Grease

PWC11-001 Alkaline Cleaner CLIX

PWC11-001A Alkaline Cleaner Almon AL-333
PWC11-001B Alkaline Cleaner Magnus 1214
PWC11-001C Alkaline Cleaner B&B 3100
PWC11-001D Cleaner, Alkaline R-MC Premix
PWC11-001E Cleaner, Alkaline R-MC
PWC11-001F Alkaline Cleaner Turco 4217
PWC11-001G Alkaline Cleaner Turco 5884
PWC11-001H Alkaline Cleaner Ardrox 624
PWC11-001I Cleaner, Alkaline Carbitrol
PWC11-001J Cleaner, Alkaline Triethanolamine
PWC11-003 Detergent Cleaner (Biodegradable) Ardrox 6345

PWC11-003B Detergent Cleaner (Biodegradable) Ardrox 6367 (Turboclean 2)

PWC11-003C Detergent Cleaner (Biodegradable) Ardox 6368 (Turboclean 2 RTU)
PWC11-003D Detergent Cleaner (Biodegradable) Zok 27
PWC11-003E Detergent Cleaner (Biodegradable) B & B TC 100
PWC11-010 Alcohol, Methyl

PWC11-014 Alcohol, Isopropyl

PWC11-040 Cleaner, W.C.T. Emulsifier

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Manual Part No.3017042 Rev. 52.0 - 15/APR/19

Item No. Name Remarks

PWC13-001 Exoxy Primer

PWC15-011 Corrosion Inhibitor Corrosion-X

3. Special Tools
The special tools listed below are used in the following procedures.

Tool No. Name

PWC32271 Wash Tube
PWC32677-300 Engine Wash, System

4. Fixtures, Equipment and Supplier Tools

Not Applicable
5. Procedure
Engine cleaning includes compressor desalination washes, performance recovery washes and
compressor turbine washes. But an external wash is recommended when the engine gets
contamination with salt (Ref. Para. 6.).
During the compressor wash, motor the engine with the starter and washing fluids are sprayed into
the engine intake through a wash wand or a high flow (2 to 3 gallon/minute) (7.57 to 11.36
liters/minute) spray ring. For the compressor turbine wash, remove an igniter and install a wash
tool in its position.
Motoring washes are carried out at an Ng of 14 to 25% and the water or cleaning mixture, which is
pressurized at 30 to 50 psi (207 to 345 KPa) is sprayed into the compressor inlet through the high-
flow spray ring. Washing while motoring the engine ensures that the cleaning mixture remains in
liquid form.
Depending on the operating environment, it is recommended that the frequency of compressor
washing follows the directives contained in Table 701.
6. Engine External Wash
An external wash with fresh water is recommended when the engine is contaminated with salt.
Demineralized water is not necessary. The engine must never be left for an extended period, such
as overnight, in a contaminated condition.
NOTE: Before performing an external wash, the engine must be allowed to cool for a minimum of
40 minutes after shutdown.
7. Compressor Wash
NOTE: For compressor motoring wash on Pre-SB5131 engines, it is recommended that either a
50-hole wash ring or a wash wand be manufactured in accordance with Figure 701 or
702.

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Manual Part No.3017042 Rev. 52.0 - 15/APR/19

Figure 701 Wash Wand

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Figure 702 Modified Wash Ring

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A. Preparation of Equipment (Ref. Fig. 703)

Figure 703 Compressor Wash System - Schematic

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(1) Set up compressor wash system as shown on schematic.

NOTE: Tubing for interconnection of components is to be 5/16 in. (8mm) ID minimum.
Table 701 Wash Schedule Recommendations

Environment Wash Frequency Method Remarks

Continuously Desalination Daily Motoring Strongly recommended after last flight

salt laden of day.

Occasionally Desalination Weekly Motoring Strongly recommended after the last

salt laden flight of applicable day. Adjust washing
frequency to suit engine condition.

All Performance 50 hours or Motoring Strongly recommended.

Recovery weekly Adjust washing frequency to suit
engine operating conditions as
indicated by engine condition.

A motoring wash for light soil or

multiple motoring washes for heavy
soil contamination is recommended.

NOTE: Multiple motoring wash should be performed to the extent permitted by starter
operating limitations. Observe starter cooling period (Ref. Starter Manufacturer's
Manual).

B. Preparation of Cleaning Solutions

(1) To get a supply of demineralized water or drinking quality (potable) water, follow the
criteria in the Table 702.
Table 702 Water Quality

Demineralized/Distilled Water Drinking Quality (Potable) Water

Appearance: Free of suspended solids Appearance: Free of suspended solids

Total solids: 10 ppm (10 mg/l) maximum Total solids: 175 ppm (175 mg/l)
maximum

Ph: 5.0 to 7.5 inclusive Ph: 6.0 to 8.0 inclusive

Silica content: 3 ppm (3 mg/l) maximum Chlorides: 15 ppm (15 mg/l) maximum

Specific conductance: 11 microhms/cm Sulfates: 10 ppm (10 mg/l) maximum

maximum

WARNING: READ MATERIAL SAFETY DATA SHEETS BEFORE USING THESE

PRODUCTS.
(2) 5 liters (1.33 U.S. gal.) of cleaning mixture and 10 liters (2.66 U.S. gal.) of flush solution
are necessary. Preparation of the solution depends on prevailing ambient temperature and
must be prepared in accordance with Tables 703, 704, 705 for cleaning and Table 706 for
flushing.
NOTE: 1. Use correct protection when you use chemicals. Refer to Material Safety Data
Sheets.
NOTE: 2. Do not mix different types of cleaning solution, they can be chemically
incompatible.
NOTE: 3. For additional information regarding Consumable Materials referred to in this
section refer to CONSUMABLE MATERIALS.

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Manual Part No.3017042 Rev. 52.0 - 15/APR/19

(a) Prepare one of the cleaning agents that follow (Ref to Table 703).
1 Turco 4217 (concentrate) (PWC11-001F).
2 Ardrox 624 (concentrate) (PWC11-001H).

Table 703 Cleaning Solution Formulation - Turco 4217/Ardrox 624

Ambient Ambient Cleaning Aviation Isopropyl Water

Temperature Temperature Agent Kerosene Alcohol (NOTE
°C °F (NOTE 1) (NOTE 2) % by vol. 3)
% by vol. % by vol. % by
vol.

+2 Up +36 Up 4 40 Nil 56

-25 to +2 -12 to +36 4 40 20 36

Below -25 Below -12 4 40 36 20

Example ( at +2 °C ):

Turco 4217 4% by vol. = 200 ml in 5 liters (1.33 US Gallons)

Kerosene 40% by vol. = 2000 ml

Isopropyl Alcohol 0% by vol. = 0 ml

Water 56% by vol. = 2800 ml

Total 100% by vol. = 5000 ml or 5 liters (1.33 US Gallons)

NOTE: 1. Use one of the cleaning agent (Ref. CONSUMABLE MATERIALS). Solution
strength must be as per the manufacturer/suplier's recommendations.
Where no specific instructions are given, proportion of cleaning agent must
be as indicated.

NOTE: 2. If you use kerosene, add necessary quantity of witco P10-59B emulsifier
(PWC05-005), then shake the mixture fully before you use (150 ml witco
P10-59B per 2000 ml of kerosene).

NOTE: 3. Drinking quality water is permitted for motoring wash procedures.

(b) Prepare one of the cleaning agents that follow (Ref. Table 704).
1 Zok 27 (PWC11-003D).
2 Ardrox 6367 (Turboclean 2 ) (PWC11-003B).
3 Ardrox 6345 (PWC11-003).

Table 704 Cleaning Solution Formulation - Zok 27, Turboclean 2/Ardrox 6345

Ambient Ambient Cleaning Aviation Isopropyl Water

Temperature Temperature Agent Kerosene Alcohol (NOTE
°C °F (NOTE 1) (NOTE 2) % by vol. 3)
% by vol. % by vol. % by
vol.

+5 Up +41 Up 20 Nil Nil 80

-5 to +5 +23 to +41 20 Nil 20 60

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Manual Part No.3017042 Rev. 52.0 - 15/APR/19

Ambient Ambient Cleaning Aviation Isopropyl Water

Temperature Temperature Agent Kerosene Alcohol (NOTE
°C °F (NOTE 1) (NOTE 2) % by vol. 3)
% by vol. % by vol. % by
vol.
-21 to -5 -6 to +23 20 Nil 30 50

Below -21 Below -6 20 Nil 40 40

Example ( at +5 °C ):

Zok27 20% by vol. = 1000 ml in 5 liters (1.33 US Gallons)

Isopropyl Alcohol 0% by vol. = 0 ml

Water 80% by vol. = 4000 ml

Total 100% by vol. = 5000 ml or 5 liters (1.33 US Gallons).

NOTE: 1. Use one of the cleaning agent (Ref. CONSUMABLE MATERIALS). Solution
strength must be as per the manufacturer/suplier's recommendations.
Where no specific instructions are given, proportion of cleaning agent must
be as indicated.

NOTE: 2. If you use kerosene, add necessary quantity of witco P10-59B emulsifier
(PWC05-005), then shake the mixture fully before you use (150 ml witco
P10-59B per 2000 ml of kerosene).

NOTE: 3. Drinking quality water is permitted for motoring wash procedures.

(c) Prepare one of the cleaning agents that follow (Ref. Table 705).
1 Equivalent proportions for magnus 1214 (PWC11-001B).
2 R-MC premix (PWC11-001D) or ardrox 6368 (Turboclean 2 RTU) (PWC11-003C)
(Ready-to-Use).
NOTE: 1. For ambient temperatures of +2°C (+36°F) or more, do not mix the
cleaning agent.
NOTE: 2. For ambient temperatures of +2°C (+36°F), mix the cleaning solution
(Ref. Table 705).
3 W.C.T. as follows: Mix two parts witco emulsifier P10-59B (PWC05-005) with four
parts carbitrol (PWC11-001I) and one part triethanolamine (PWC11-001J).
4 R-MC (PWC11-001E).
5 Almon AL-333 (PWC11-001A).
6 Turco 5884 (PWC11-001G) and CLIX (PWC11-001).
7 B & B 3100 (PWC11-001C).
8 TC100 (PWC11-003E).

Table 705 Cleaning Solution Formulation

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Ambient Ambient Cleaning Aviation Isopropyl Water

Temperature Temperature Agent Kerosene Alcohol (NOTE
°C °F (NOTE 1) (NOTE 2) % by vol. 3)
% by vol. % by vol. % by
vol.

+2 Up +36 Up 25 Nil Nil 75

-25 to +2 -12 to +36 25 15 20 40

Below -25 Below -12 25 15 40 20

Example ( at +2 °C ):

B & B 3100 25% by vol. = 1250 ml in 5 liters (1.33 US Gallons)

Kerosene 15% by vol. = 1250 ml

Isopropyl Alcohol 20% by vol. = 1000 ml

Water 40% by vol. = 2000 ml

Total 100% by vol. = 5000 ml or 5 liters (1.33 US Gallons).

NOTE: 1. Use one of the cleaning agent (Ref. CONSUMABLE MATERIALS). Solution
strength must be as per the manufacturer/suplier's recommendations.
Where no specific instructions are given, proportion of cleaning agent must
be as indicated.

NOTE: 2. If you use kerosene, add necessary quantity of witco P10-59B emulsifier
(PWC05-005), then shake the mixture fully before you use (150 ml witco
P10-59B per 2000 ml of kerosene).

NOTE: 3. Drinking quality water is permitted for motoring wash procedures.

(3) Prepare 2.66 U.S. gallons (10 liters) of rinse solution for a motoring wash.
NOTE: Refer to Table 706 for water/isopropyl alcohol proportions to be used depending on
ambient temperature.
Table 706 Preparation of Rinse Solution

AMBIENT WATER % by ISOPROPYL ALCOHOL (PWC11-014) % by VOL.

AIR VOL. See NOTE 1
TEMPERATURE

40° F (4.4 °C) 100 0

And Above

39 °F (3.9 °C) 95 5

36 °F (2.7 °C) 91 9

33 °F (0.6 °C) 86 14

31 °F (-0.6°C) 83 17

28 °F (-2.2 °C) 80 20

26 °F (-3.3 °C) 78 22

25 °F (-3.9 °C) 77 23

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AMBIENT WATER % by ISOPROPYL ALCOHOL (PWC11-014) % by VOL.

AIR VOL. See NOTE 1
TEMPERATURE
20 °F (-6.7 °C) 73 27

15 °F (-9.4 °C) 68 32

10 °F (-12.2 °C) 64 36

5 °F (-15 °C) 61 39

0 °F (-17.8 °C) 57 43

NOTE: 1. Use of drinking quality water is permitted when performing a rinse following a
motoring wash.

C. Motoring Wash - Desalination (Ref. Fig. 704)

Figure 704 P3 System - Wash

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1. Bolt
2. Nut
3. Bracket
4. Nut
5. Loop Clamp
6. Tube Assembly
7. Locknut
8. Reducer
9. Tube Connection
10. Loop Clamp
11. Copper Gasket
12. Locknut
13. Elbow (Pre-SB5423); Tee Fitting (Post-SB5423)
14. Tube Connection
15. Bolt
16. Clamp
17. Nut
18. Cap

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CAUTION: USE OF THE CORRECT MIXTURE AS SPECIFIED IN SUBPARA. B.,

PRECEDING, IS VERY IMPORTANT, NOT ONLY WHEN THE
TEMPERATURE IS BELOW FREEZING AT THE TIME OF WASHING, BUT
ALSO IF THE TEMPERATURE IS EXPECTED TO BE LOW BETWEEN THE
TIME OF WASHING AND THE NEXT START.
(1) Remove P3 air filter elements and P3 lines, as applicable (Ref. 73-10-07).
(a) For Pre-SB5309 engines; remove P3 filter element from P3 filter located at gas
generator.
NOTE: For Post-SB5309 engines; removal of P3 air filter element at gas generator is
not required.
(b) For Pre-SB5174, Post-SB5174 and Pre-SB5423 engines; remove P3 (6) line at gas
generator case.
(c) For Post-SB5423 engines; remove cap (18) at tee fitting (13) on gas generator case.

(2) Connect wand or wash ring to supply from wash rig. Alternatively connect via suitable hose
to drinking quality water supply for ambient temperatures above +4°C (+39°F).
(3) Fill wash tank with prepared rinse solution (Ref. Table
706).
(4) Pressurize tank at 30 to 50 psi (207 to 345 KPa) with air or nitrogen supply.
NOTE: 1. If you use the drinking quality water and pressure is less than 30 psig (207
KPag), connect through a centrifugal pump.
NOTE: 2. When you use drinking quality water, to prevent the precipitation of deposits
through the use of hard water, let the engine become cool to less than 65 °C
(149 °F). You must let a minimum cooling period of 40 minutes since the engine
was last operated.
NOTE: 3. You can do a compressor desalination wash on a hot engine (above 65 °C (149
°F)), such as immediately after shutdown. Use demineralized/distilled water only
on a hot engine.

CAUTION: DO NOT MOTOR ENGINE FOR MORE THAN 30 SECONDS. OBSERVE

STARTER COOLING PERIOD (REF. STARTER MANUFACTURER'S
MANUAL).
(5) Ensure that ignition circuit breaker is pulled and aircraft bleed air system is OFF.
NOTE: For additional procedures for fuel shut-off valve and fuel boost pump, refer to
Aircraft Flight Manual.
(6) Disconnect flow divider/dump valve hose at each power section prior to injecting water and
water mixture. Place detached end of flow divider/dump valve hose into suitable container
for collection of water mixture.
(7) Fuel Boost Pump Switch - ON. Check fuel pressure (Ref. to the Airframe Maintenance
Manual).
(8) Motor engine and when Ng reaches 5%, inject wash mixture (or water) into
engine.
(9) Stop motoring after 30
seconds.
(10)Close tank valve as soon as Ng falls to 5%.
(11)Observe starter cooling period.
(12)Remove the wash wand or wash rig (if applicable) from the engine.
(13)Perform two consecutive dry motoring runs. Observe starter limitations (Ref. Starter
Manufacturer's Manual).

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(14)Install P3 air filter elements and P3 lines as applicable (Ref. 73-10-07).

(a) For Pre-SB5309 engines; install P3 air filter element to filter located at gas generator.
(b) For Pre-SB5174, Post-SB5174 and Pre-SB5423 engines; reconnect P3 line (6) to elbow
(13) and torque coupling nut 135 to 150 lb.in. and lockwire.
(c) For Post-SB5423 engines; install cap (18) on tee fitting (13) and torque 100 to 110
lb.in. and lockwire.

(15)Connect the flow divider/dump valve hose at each power section (Ref. Aircraft Maintenance
Manual).
(16)After starter cooling period, start engine (Ref. 71-00-00).
(17)Run the engine at flight idle to fully dry the engine.
NOTE: 1. This step is not necessary if the engine is run in the next 15 minutes.
NOTE: 2. Run the engine at idle for a minimum of five minutes with the MOT above 50°C
(122 °F).
D. Motoring Wash - Performance Recovery

CAUTION: USE OF THE CORRECT MIXTURE AS SPECIFIED IN SUBPARA. B.,

PRECEDING, IS VERY IMPORTANT, NOT ONLY WHEN THE
TEMPERATURE IS BELOW FREEZING AT THE TIME OF WASHING, BUT
ALSO IF THE TEMPERATURE IS EXPECTED TO BE LOW BETWEEN THE
TIME OF WASHING AND THE NEXT START.
(1) Remove P3 air filter elements and P3 lines, as applicable (Ref. 73-10-07).
(a) For Pre-SB5309 engines; remove P3 filter element from P3 filter located at gas
generator.
NOTE: For Post-SB5309 engines; removal of P3 air filter element at gas generator is
not required.
(b) For Pre-SB5174, Post-SB5174 and Pre-SB5423 engines; remove P3 line at gas
generator case.
(c) For Post-SB5423 engines; remove cap at tee fitting on gas generator case.

(2) Fill wash tanks with appropriate cleaning and rinse solutions (Ref. Subpara. B.). Connect
engine wand or wash ring to wash rig.

CAUTION: DO NOT DO A COMPRESSOR PERFORMANCE RECOVERY WASH ON A

HOT ENGINE (TEMPERATURE MORE THAN 65 °C (149 °F)) OR AN
ENGINE THAT IS IN OPERATION. USE OF WASH CHEMICALS IN A HOT
ENGINE WILL CAUSE ENGINE CONTAMINATION.
(3) Pressurize tanks at 30 to 50 psig (207 to 345 KPag) with air or nitrogen
supply.
NOTE: DELETED.

CAUTION: DO NOT MOTOR ENGINE FOR MORE THAN 30 SECONDS. OBSERVE

STARTER COOLING PERIOD (REF. STARTER MANUFACTURER'S
MANUAL).
(4) Ensure that ignition circuit breaker is pulled and aircraft bleed air system is OFF.
NOTE: For additional procedures for fuel shut-off valve and fuel boost pump, refer to
Aircraft Flight Manual.
(5) Disconnect flow divider/dump valve hose at each power section prior to injecting water and
water mixture. Place detached end of flow divider/dump valve hose into suitable container
for collection of water mixture.
(6) Fuel Boost Pump Switch - ON. Check fuel

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pressure.
(7) Motor engine and when Ng reaches 5%, inject cleaning solution into engine.
(8) Stop motoring after 30
seconds.
(9) Close tank valve as soon as Ng falls to
5%.
(10)Allow cleaning solution to soak for 15 to 30 minutes.
(11)Motor engine and when Ng reaches 5%, inject rinse solution into engine.
(12)Stop motoring after 30 seconds.
(13)Observe starter cooling period.
(14)Repeat steps (11) and (12) .
(15)Remove wash wand or wash ring (if applicable) from engine.
(16)Perform two consecutive dry motoring runs. Observe starter limitations (Ref. Starter
Manufacturer's Manual).
(17)Install P3 air filter elements and P3 lines as applicable (Ref. 73-10-07).
(a) For Pre-SB5309 engines; install P3 air filter element to filter located at gas generator.
(b) For Pre-SB5174, Post-SB5174 and Pre-SB5423 engines; reconnect P3 line to elbow and
torque coupling nut 135 to 150 lb.in. and lockwire.
(c) For Post-SB5423 engines; install cap on tee fitting and torque 100 to 110 lb.in. and
lockwire.

(18)Connect the flow divider/dump valve hose at each power section (Ref. Aircraft Maintenance
Manual).
(19)After starter cooling period, start engine (Ref. 71-00-00, POWER PLANT -
ADJUSTMENT/TEST).
(20)Run the engine at flight idle to fully dry the engine.
NOTE: 1. This step is not necessary if the engine is run in the next 15 minutes.
NOTE: 2. Run the engine at idle for a minimum of five minutes with the MOT above 50°C
(122 °F).
E. Compressor Turbine Wash

CAUTION: USE OF THE CORRECT MIXTURE AS SPECIFIED IN SUBPARA. B.,

PRECEDING, IS VERY IMPORTANT, NOT ONLY WHEN THE
TEMPERATURE IS BELOW FREEZING AT THE TIME OF WASHING, BUT
ALSO IF THE TEMPERATURE IS EXPECTED TO BE LOW BETWEEN THE
TIME OF WASHING AND THE NEXT START.

NOTE: 1. The proven method to decrease the possibility of sulfidation is the turbine
desalination wash with plain water. This procedure does not replace the compressor
wash and is a method to wash the compressor turbine blades. The frequency is
based on the choice of the customer and previous sulfidation experience.
NOTE: 2. A minimum cool-down period of 40 minutes should be observed.
(1) Depending on ambient temperatures, fill wash tank with appropriate rinse solution (Ref.
Table 706).
(2) Connect compressed air supply regulated 30 to 50 psig (207 to 345 kPa) to wash
tank.
(3) Disconnect flow divider/dump valve hose at each power section prior to injecting water and
water mixture. Place detached end of flow divider/dump valve hose into a suitable container
for collection of water mixture.

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(4) Remove either spark igniter from gas generator

case.
(5) Install wash tube (PWC32271). Ensure arrow on wash tube tab is parallel to engine center
line and pointing to RGB.

CAUTION: SUPPORT DELIVERY HOSE TO PREVENT DAMAGE TO WASH TUBE.

(6) Connect wash rig hose to wash
tube.
(7) Ensure ignition and aircraft bleed air is OFF.
NOTE: For additional procedures for fuel shut-off valve and fuel boost pump, refer to
Aircraft Flight Manual.

CAUTION: DO NOT MOTOR FOR MORE THAN 30 SECONDS, OBSERVE STARTER

COOLING PERIOD (REF. STARTER MANUFACTURER'S MANUAL).
(8) Carry out 30 second motoring run. Introduce solution at approximately 5%
Ng.

CAUTION: WHEN USING WATER/METHANOL SOLUTION PERFORM ADDITIONAL

DRY MOTORING RUN TO PURGE ENGINE OF VOLATILE FUMES. ENSURE
STARTER LIMITS ARE OBSERVED.
(9) Repeat motoring run, as applicable, to remove
contaminants.
(10)Disconnect wash rig, and remove wash tube from gas generator case.
(11)Fit new gaskets on spark igniter and torque 300 lb.in., loosen to zero, and retorque 300 to
360 lb.in.
(12)Perform two consecutive dry motoring runs. Observe starter limitations (Ref. Starter
Manufacturer's Manual).
(13)Connect the flow divider/dump valve hose at each power section (Ref. Aircraft Maintenance
Manual).
(14)Start engine (Ref. 71-00-00, POWER PLANT - ADJUSTMENT/TEST) and run at idle to fully
dry the engine.
NOTE: 1. This step is not necessary if the engine is run in the next 15 minutes.
NOTE: 2. Run the engine at idle for a minimum of five minutes with the MOT above 50°C
(122 °F).
8. Corrosion Inhibitor
A. Procedure
NOTE: To obtain full benefit of the corrosion inhibitor, remove traces of corrosion and touch-up
with epoxy enamel paint prior to applying the corrosion inhibitor.
(1) Do an external engine wash in accordance with the Engine Maintenance Manual, Section 72-
00-00, Engine-Cleaning.
(2) Do a desalination wash in accordance with the Engine Maintenance Manual, Section 72-00-
00, Engine-Cleaning.
(3) If required, do a touch-up coating as follows:
(a) Clean the surface with isopropyl alcohol (PWC11-014) or equivalent.
(b) Apply one coat of epoxy primer (PWC13-001).
(c) After 1 hour, when the epoxy primer is dry, apply one coat of epoxy enamel (PWC05-
037).
(d) You can use a heat gun to heat the surface, 140 to 160 °F (60-82 °C) for one hour to
bake the enamel coating or wait 24 hours at room temperature.

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MAINTENANCE MANUAL 72-00-00 - ENGINE- CLEANING
Manual Part No.3017042 Rev. 52.0 - 15/APR/19

WARNING: REFER TO MANUFACTURER'S MATERIAL SAFETY DATA SHEETS

FOR INFORMATION SUCH AS; HAZARDOUS INGREDIENTS,
PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE, EXPLOSION,
REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE
HANDLING, USE AND CONTROL MEASURES.

CAUTION: ALLOW ENGINE TO COOL BEFORE APPLYING THE CORROSION

INHIBITOR. IF SPRAYED ON A HOT SURFACE, THE CARRIER
SOLVENT WILL EVAPORATE RAPIDLY (FLASH OFF) AND CAN
EASILY IGNITE IF AN IGNITION SOURCE IS PRESENT.

CAUTION: DO NOT APPLY CORROSION INHIBITOR ON CONNECTORS,

WIRING HARNESS, PROBES, RUBBER MATERIAL, ELECTRICAL
EQUIPMENT OR HOT SECTION OF ENGINE.
1 Spray or brush on the corrosion inhibitor (PWC15-011) per the manufacturer's
instructions on the following visible external areas:
a On the accessory gearbox housing and rear diaphragm.
b On the inlet case mating flange to the accessory gearbox rear diaphragm.

2 Once every operational/flying day or as required, check the engine to verify if it is

still covered with the corrosion inhibitor (oily surface).
NOTE: 1. During this period, as the corrosion inhibitor starts to evaporate or is
washed away, re-apply the corrosion inhibitor as required and determine
the optimum period between applications.
NOTE: 2. Discontinue use of silicone grease (PWC09-003) when using corrosion
inhibitor (PWC15-011).

9. Fuel Nozzle In-situ Cleaning

For in-situ cleaning of nozzles, engine wash system (PWC32677-300) is necessary. Before the wash
cycle, prepare and operate the engine wash system (PWC32677-300) in accordance with the
Cleaning Rig Manual.
NOTE: 1. It is recommended that this method of cleaning should only be initiated on new or
newly cleaned nozzles as the procedure will not clear previous blockages.
NOTE: 2. Introduction of contaminants may cause blockage of the fuel nozzles, power
degradation and hot section damage. Ensure that the wash and rinse solutions are free of
contaminates and that the fluid filter is routinely checked in accordance with the Cleaning
Rig Manual.
A. Preparation

CAUTION: TURCO 5884 (PWC11-001G) IS AN ALKALINE THAT CAN CAUSE

IRRITATION TO BARE SKIN. AVOID SKIN CONTACT.

NOTE: Alternative cleaning solutions Zok 27 (PWC11-003D) and Ardox Turboclean 2 (PWC11-
003B) may also be used. Refer to Para. 7. B.(2) (b) for mixing methods.
(1) Mixture ratios to be as follows:
(a) At ambient temperatures of 2°C (35.5°F) and above, mix by volume: 1 part Turco 5884
(PWC11-001G) to 4 parts demineralized water.
(b) At ambient temperatures below 2°C (35.5°F), mix a 50% solution of methanol and
demineralized water, then mix 4 parts of water/methanol (by volume) to 1 part Turco
5884 (PWC11-001G).

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MAINTENANCE MANUAL 72-00-00 - ENGINE- CLEANING
Manual Part No.3017042 Rev. 52.0 - 15/APR/19

CAUTION: BEFORE PROCEEDING FURTHER, ENSURE THAT AIR HAS BEEN

RELEASED FROM RESERVOIRS.
(2) Fill solution reservoir with appropriate volume of Turco 5884 (PWC11-001G) (Ref. step (1)
).
(3) Fill rinse reservoir with appropriate volume of demineralized water or demineralized
water/methanol mixture according to ambient temperature (Ref. step (1) ).
(4) Disconnect and remove engine fuel delivery line from flow divider inlet fitting located at 6
o'clock position on engine gas generator case (Ref. 73-10-05). Install and torque blanking
cap assembly at fuel inlet to flow divider/dump valve.
(5) Disconnect airframe drain line from flow divider/dump valve outlet fitting (elbow or nipple)
(Ref. 73-10-05).
(6) Install and connect rig fluid delivery hose to flow divider/dump valve outlet fitting using
proper adapter (0.4375-20 UNJF) (Ref. Fig. 705).

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MAINTENANCE MANUAL 72-00-00 - ENGINE- CLEANING
Manual Part No.3017042 Rev. 52.0 - 15/APR/19

Figure 705 Typical Wash Rig Connection to Engine (Nozzle

Cleaning)

c11071a

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MAINTENANCE MANUAL 72-00-00 - ENGINE- CLEANING
Manual Part No.3017042 Rev. 52.0 - 15/APR/19

(7) Connect rig fluid delivery hose to rig quick disconnect (Location: "FUEL
NOZZLE").
(8) Connect compressed air supply to
rig.

CAUTION: DO NOT EXCEED 120 PSIG.

(9) Set wash rig reservoir pressures to 60 psig using reservoir
regulator.
(10)Set pulse pressure to 70 psig using pulse regulator.
B. Cleaning Cycle
(1) Perform the in-situ nozzle wash as follows :
NOTE: The engine should be permitted to cool for a minimum of 40 minutes following an
engine shutdown before performing a fuel nozzle wash.
Table 707 Wash Cart Operating Schedule

OPERATION VALVE POSITION

A B C

(1) Agitate detergent solution for two minutes Agitate Agitate OFF

(2) Detergent wash for three minutes Wash Wash ON

(3) Soak for 10 minutes OFF OFF OFF

(4) Detergent wash for three minutes Wash Wash ON

(5) Soak for 10 minutes OFF OFF OFF

(6) Rinse for six minutes Rinse Rinse ON

(7) Air dry for five minutes OFF OFF Air Dry

(8) Reduce both reservoir and pulse pressure to zero OFF OFF OFF

C. Post-cleaning Operation
(1) Upon completion of the Cleaning Cycle (Ref. Subpara.B., preceding), perform the following
steps:
(a) Disconnect and remove compressed air supply from wash rig.
(b) Disconnect and remove wash rig fluid delivery hose from flow divider/dump valve elbow
or nipple.
(c) Remove blanking cap assembly at fuel inlet to flow divider/dump valve.
(d) Reconnect fuel delivery line to flow divider/dump valve fitting (Ref. 73-10-05).
(e) Perform two consecutive dry motoring runs, if the ambient temperature is below 2°C
(35.5°F) and the water/methanol solution has been utilized. Observe starter limitations
(Ref. Starter Maintenance Manual).
(f) Perform an engine ground run (Ref. applicable Aircraft Manual) and check for leaks.
(g) Clean wash rig, stow fluid delivery hoses and bleed air pressure from reservoirs.

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