MINIMUM EQUIPMENT LIST Page 30 - 1
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
01. WING ANTI-ICE VALVES C 2 0 (M)(O) Except for ER operations beyond 120
minutes, may be inoperative closed
provided airplane is not operated in
known or forecast icing conditions.
1) (-100/-200) C 2 0 (M)(O) May be inoperative open provided:
a) Valve is manually closed for engine
start,
b) Associated manifold is depressurized
when outside air temperature is above
50 degrees F (10 degrees C),
c) Associated engine bleed thrust limits
are followed when manifold is
pressurized, and
d) Air conditioning and pressurization
requirements are followed when one
or both manifolds are depressurized.
PLACARD
WING ANTI-ICE switch - INOP ON or OFF
MAINTENANCE (M)
NOTE: Disconnecting the wing anti-ice valve's electrical connector will cause the associated
wing anti- ice VALVE OPEN light to illuminate bright.
1) Gain access to valve located in the wing leading edge just outboard of the engine (Reference
Aircraft Maintenance Manual AMM 30-11-00). Use normal precautions to prevent flap
retraction while working in this area.
2) Manually move the valve to the desired position (open or closed) using the valve position
indicator (after engine start if the valve is to be kept open).
3) Disconnect, cap and stow the electrical connector from the affected valve(s).
4) Advise Dispatch.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 2
OPERATIONS (O)
NOTE: Disconnecting the valve's electrical connector per Maintenance Procedure will cause the
associated wing anti-ice VALVE OPEN light to illuminate bright.
When the left Wing Anti-Ice Valve is failed open, do not use APU bleed air for air conditioning
purposes on the ground. APU may only be used for engine start.
When the right Wing Anti-Ice Valve is failed open, APU bleed air may be used for air conditioning
purposes on the ground using only the left AC pack and with the isolation valve closed.
The appropriate engine bleed thrust limits to be used with the valve failed open are the normal limits
for wing anti-ice "ON". No wing anti-ice on decrements are published for takeoff, consequently the
engine bleed to the affected manifold must be off for takeoff. Position isolation valve switch to
CLOSE to maintain isolated bleed sources. The isolation valve switch must remain in the CLOSE
position until the associated manifold can be pressurized by turning the engine bleed ON, (Outside
air temperature must be above 50 degrees).
With both valves failed open, the airplane cannot be pressurized for takeoff. As soon as the aircraft
is airborne, and the "TAT" is below 50oF (10oC), the engine bleeds may be turned on. The in-flight
anti-ice thrust limits should then be observed.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 3
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
02. WING ANTI-ICE VALVE C 2 0 (M) May be inoperative provided valve is
POSITION LIGHTS verified to operate normally before
operating in known or forecast icing
conditions.
PLACARD
Valve open light - INOP
MAINTENANCE (M)
1) Verify that associated wing anti-ice valve operates normally.
2) Deactivate the leading edge slats (Aircraft Maintenance Manual 27-81-00).
3) Open the associated outboard leading edge blowout door.
4) Position the WING ANTI-ICE switch to the GRD TEST or ON position.
5) Observe that position indicator on the valve indicates OPEN.
6) Position the WING ANTI-ICE switch to the OFF position.
7) Observe that position indicator on the valve indicates CLOSED.
8) Close the associated outboard leading edge blowout door.
9) Activate the leading edge slats (Boeing Maintenance Manual 27-81-00).
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 4
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
03. ENGINE AND NOSE
COWL ANTI-ICE
VALVES
1) (-100/-200) C 6 5 (M)(O) One may be inoperative closed
provided:
a) All remaining anti-ice valves operate
normally, and
b) Airplane is not operated in known or
forecast icing conditions.
C 6 5 (M)(O) One may be inoperative open
provided:
a) All remaining valves operate normally,
b) Operating temperature for cowl valves
is limited to 50 degrees F (10 degrees
C) maximum (ambient or total air
temperature) unless S/B 71-1045 or
71-1046 “Nose Cowl TAI Spray Ring
Modification” or production equivalent
has been incorporated, and
c) Appropriate performance adjustments
are applied.
PLACARD
Affected ENG ANTI-ICE switch - INOP LOCKED OPEN or CLOSED.
MAINTENANCE (M)
NOTE: Dispatching with an engine and/or nose cowl anti-ice valve electrical connector will
cause the associated cowl anti-ice light to illuminate bright.
1) Open affected engine control circuit breaker ("CONTROL ENG 2" or "CONTROL ENG 1 &
WING") (Panel P18-3).
2) Gain access to affected valve:
A) Engine anti-ice valves are at the 1 o'clock and 11 o'clock positions aft of the inlet
guide vane case (Reference Boeing Maintenance Manual).
B) Nose cowl anti-ice valves are at the 4 o'clock position aft of the nose cowl
(Reference Boeing Maintenance Manual).
3) Verify that the affected valve is fully "OPEN" or "CLOSED" by inspecting the "visual position
indicator".
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 5
NOTE: The "visual position indicator" can be used to position the butterfly valve to the fully
"OPEN" or "CLOSED" detents.
4) Disconnect, cap, and stow the electrical connector.
5) "CLOSE" the affected engine control circuit breaker.
6) Restore the airplane to its required configuration.
7) Check S/B 71-1045 and 71-1046 as applicable
8) Inform Dispatch.
NOTE: Disconnecting the engine and/or nose cowl anti-ice valve electrical connector will cause
the associated cowl anti-ice light to illuminate bright.
OPERATIONS (O)
NOTE: Dispatching with an engine and nose cowl anti-ice valve's electrical connector will
cause the associated COWL VALVE OPEN light to illuminate bright.
1) ONE VALVE INOPERATIVE CLOSED:
A) Operate with associated engine anti-ice switch OFF.
B) Do not operate airplane in icing conditions.
2) ONE VALVE INOPERATIVE OPEN:
A) Operate with associated engine anti-ice switch OFF.
B) Apply adjustments to EPR and performance limit weights.
NOTE 1: Maximum operating temperature limit of 50'F (10'C) only applies to the nose cowl valves
(note nigne) if S/B 71-1045 or 71-1046 "Nose Cowl TAI Spray Ring Modification" or
production equivalent has not been incorporated.
NOTE 2: Additional requirements shown for the JT8D-15/15A and JT8D-17/17A with engine anti-
ice "OFF", do not apply to the JT8D-17R engine. The additional requirements reflect
the Airplane Flight Manual thrust setting restrictions for operating at the specified conditions
(with anti-ice "ON"). With engine anti-ice "ON", the penalties are already accounted for
in the engine anti-ice "ON" adjustments.
C) Apply a fuel mileage decrement of 1.0%.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 6
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
04. ENGINE AND NOSE
COWL ANTI-ICE VALVE
POSITION LIGHTS OR
TAI INDICATIONS
1) (-100/-200) C 6 0 (M) May be inoperative provided valve is
verified to operate normally before
each departure.
2) (-300/-400/-500/ N/A
-600/-700/-800/
-900)
3) (-600/-700/-800/ N/A
-900)
4) (All Models) C 6 0 May be inoperative provided associated
valve is considered inoperative.
PLACARD
Placard affected VALVE OPEN light - INOP.
MAINTENANCE (M)
-200 FAILED LIGHT:
1) Prior to each departure, perform the following: Gain access to affected valve: Engine anti-ice
valves are at the 1 o'clock and 11 o'clock positions aft of the inlet guide vane
case(Reference Boeing Maintenance Manual). Nose cowl anti-ice valves are at the 4 o'clock
position aft of the nose cowl (Reference Boeing Maintenance Manual).
2) Position associated engine anti-ice switch to ON, then back to OFF.
3) Observe that position indicator on the valve follows the switch position.
OPERATIONS NOTE
LIGHT FLICKERING
1) Position associated engine anti-ice switch from "OFF" to "ON", then back to "OFF".
2) Observe that indicator light response indicates a properly operating valve. Light indications
should be off, bright, dim, bright, and then off again.
3) Repeat this procedure prior to each departure.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 7
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
05. PITOT/STATIC PROBE
HEATERS
1) (-100/-200/-300/
-400/-500)
a) No. 1 Aux B 1 0 May be inoperative provided:
Pitot/Static Heater
a) No. 2 Aux Pitot Static heater operates
(Right Lower Probe)
normally,
b) RVSM operations are not conducted,
and
c) Airplane is not operated in known or
forecast icing conditions.
b) No. 2 Aux B 1 0 May be inoperative provided:
Pitot/Static Heater
a) No. 1 Aux Pitot Static heater operates
(Left Lower Probe)
normally,
b) RVSM operations are not conducted,
and
c) Airplane is not operated in known or
forecast icing conditions.
B 1 0 May be inoperative provided:
a) No.1 Aux Pitot Static heater operates
normally, and
b) Dispatch deviations for associated
equipment are observed.
c) Pitot/Static Heaters B 2 1 Pilot’s or copilot’s may be inoperative for day
(Upper Probes) VMC provided airplane is not operated in
visible moisture, or in known or forecast icing
conditions.
PLACARD
Near affected Pitot Static Probe Heater Light - HEATER INOP.
NOTE 1: RVSM = Reduced Vertical Separation Minimum.
NOTE 2: On airplanes equipped with static source selector and No. 1 or 2 Aux P/S (Lower) probe
heater is inoperative, place the affected static source selector to the ALTERNATE
position and placard - OPERATE IN ALTERNATE.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 8
OPERATIONS NOTE
1) With No. 1 Auxiliary Pitot Static (lower) probe heater inoperative:
A) Do not operate in known or forecast icing conditions.
B) On airplanes equipped with static source selector, operate with the affected static
source selector in the "ALTERNATE" position.
2) With No. 2 Auxiliary Pitot Static probe heater inoperative:
A) On airplanes with Flap Load Limiter inputs from No. 1 and No. 2 Auxiliary Pitot Static
probes, do not operate in known or forecast icing conditions unless dispatch is based
on Flap Load Limiter System inoperative (MEL Item 27-8).
B) On airplanes with the Standby Pneumatic Airspeed/Altimeter input from the No.2
Auxiliary Pitot
C) Static probe, do not operate in known or forecast icing conditions.
D) On airplanes equipped with static source selector, operate with the affected static
source selector in the "ALTERNATE" position.
3) With a Captain's or First Officer's Pitot Static (Upper) probe heater inoperative, operations
are limited to day VMC (1000/3), do not operate in visible moisture or in known or forecast
icing conditions.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 9
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
06. VERTICAL STABILIZER B 2 1 Except for ER operations beyond 120
PITOT HEATERS minutes, one may be inoperative provided
(ELEVATOR AND airplane is not operated in known or forecast
RUDDER FEEL icing conditions.
SYSTEMS)
PLACARD
Near affected Probe Heater light (L ELEV PITOT or R ELEV PITOT) - HEATER INOP
OPERATIONS NOTE
Do not operate in known icing conditions.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 10
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
07. TOTAL AIR C 2 1 Except for ER operations beyond 120
TEMPERATURE PROBE minutes, may be inoperative provided
HEATER airplane is not operated in known or forecast
icing conditions.
C 1 0 (O) May be inoperative provided an
alternate temperature indicator
system is installed and operating
normally (i.e., Ram Air or Static Air
Temperature).
PLACARD
As Appropriate.
OPERATIONS (O)
With static air temperature available, the following table may be used to determine TAT:
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 11
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
08. ANGLE OF ATTACK C 1 0 Except for ER operations beyond 120
SENSOR HEATER(S)/ minutes, may be inoperative provided
STALL WARNING airplane is not operated in known or forecast
SYSTEM SENSOR icing conditions.
HEATER(S)/ALPHA
VANE HEATER(S)
PLACARD
Single Sensor:
Near stall warning "OFF" light - HEATER INOP
OPERATIONS NOTE
Do not operate in known or forecast icing conditions.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 12
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
09. PITOT, PITOT/STATIC
AND TEMPERATURE
PROBE HEATER
LIGHTS
1) Green (Heater On)
Lights
(-100/-200)
a) Pitot and Pitot/ B 6 5 (M) One may be inoperative provided:
Static
a) Required heater function is verified
before each departure, and
b) HEATER OFF light operates normally.
b) Temperature C 1 0 (M) May be inoperative provided
associated heater function is verified
to operate normally before each
departure.
C 1 0 May be inoperative provided associated
heater is inoperative.
2) Amber (Heater Off)
Lights
a) Pitot and Pitot/ B 6 5 (M) Except for ER operations beyond 120
Static minutes, may be inoperative provided:
a) Associated heater function is verified
to operate normally, and
b) Airplane is not operated in known or
forecast icing conditions.
b) Temperature C 2 1
C 1 0 (M) May be inoperative provided
associated heater function is verified
to operate normally before each
departure.
C 1 0 May be inoperative provided associated
heater is inoperative.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 13
PLACARD
Affected light - INOP
MAINTENANCE (M)
Verify probe heater operates normally, prior to each departure:
1) Station ground observer at associated probe heater, establish communications.
2) Ensure covers are removed from all air data probes and vane heads.
3) Apply Electrical power to airplane (Ref. Boeing Maintenance Manual AMM 24-22-00)
4) For airplanes with non-aspirated TAT probes with air/ground logic for probe heater power,
verifying TAT probe heater operation requires that first, the Ground Sensing switch located
on the E11 shelf be pressed to simulate “air” mode.
5) Position the associated "PITOT STATIC HEAT" switch to the "ON" position.
6) Verify that heat radiation can be detected from associated probe, indicating that heater is
functioning. "DO NOT TOUCH PROBE."
CAUTION: DO NOT PLACE HAND ON PROBE. TEMPERATURES ARE HIGH ENOUGH TO
CAUSE BURNS. DO NOT LEAVE HEATER ON LONGER THAN REQUIRED.
HEATER LIFE MAY BE UNNECESSARILY SHORTENED.
7) Position the associated "PITOT STATIC HEAT" switch to the "OFF" position.
8) Restore airplane electrical system to normal.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 14
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE A
NUMBER. T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
11. ELECTRICALLY
HEATED WINDSHIELDS
1) No. 1 or No. 2 C 4 3 Except for ER operations beyond 120
Window minutes, one No. 1 or No. 2 window heater
may be inoperative provided:
a) Airplane is not operated in known or
forecast icing conditions,
b) Windshield de-fog system operates
normally, and
c) Airspeed is limited to 250 KIAS below
10,000 feet MSL.
2) No. 4 or No. 5 C 4 0 No. 4 and No. 5 window heat may be
Window inoperative provided airspeed is limited to
250 KIAS below 10,000 feet MSL.
3) No. 3 Window Heat D 2 0
System(s)
PLACARD
Affected window heat switch - INOP
MAINTENANCE NOTE
Requirements for replacement of damaged windows are discussed in Chapter 56 of the AMM.
Dispatch with window damage that does not require replacement is permitted.
OPERATIONS NOTE
1) Operate with the affected window heat switch OFF. With one No. 1 window heat inoperative,
operate with the Windshield Air (pneumatic anti-fogging system) on when window heat is
required.
A) Do not operate in known or forecast icing conditions.
B) Limit airspeed to 250 KIAS below 10,000 feet MSL.
2) With No. 4 or No. 5 window heat inoperative, limit airspeed to 250 KIAS below 10,000 feet
MSL.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 15
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
12. DE-FOG SYSTEM C 1 0
PLACARD
Windshield Air Control – INOP
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
13. WINDSHIELD WIPER C 2 0 May be inoperative provided airplane is not
SYSTEM(S) operated in precipitation within 5 nautical
miles of airport of takeoff or intended landing.
1) Park Function C 2 0 May be inoperative for all flight conditions
provided blade(s) can be positioned in a
location that will not obstruct forward vision.
2) Intermittent Speed N/A
Function (-300/
-400/-500/ -600/
-700/-800/-900)
3) Low Speed C 2 0 May be inoperative provided both high speed
Function functions operate normally.
4) High Speed C 2 1 One may be inoperative provided associated
Function low speed function operates normally.
C 2 0 May be inoperative provided both low speed
functions operate normally and rain intensity
is less than moderate.
PLACARD
Applicable switch - as appropriate.
MAINTENANCE NOTE
If blade obstructs forward vision:
1) Remove bolt securing arm to convert shaft and remove wiper arm.
2) Install wiper arm in "PARK" position. To locate arm for "PARK" position, install arm on
converter shaft so that blade will be parallel to window seal when a 2 to 3 pound force is
applied to blade attach point.
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 16
3) Secure wiper arm to converter shaft with attaching bolt and lockwire
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 17
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
16. HEATER OFF LIGHT B 1 0 (O) May be inoperative provided:
(-100/-200)
a) Remaining components of pitot heat
system are verified to operate
normally, and
b) Airplane is not operated in known or
forecast icing conditions.
PLACARD
Pitot Heat Indicating System on pilot's overhead panel - INOP
OPERATIONS (O)
1) Ensure that all other elements of the pitot heat system are operating normally.
2) Do not operate in icing conditions
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 18
C 2. NUMBER INSTALLED
1. SYSTEM & SEQUENCE
A
NUMBER.
T 3. NUMBER REQUIRED FOR DISPATCH
30 – ICE & RAIN 4. REMARKS OR EXCEPTIONS
PROTECTION
18. ALPHA VANE HEATER C 2 0 (M) May be inoperative provided
LIGHT SYSTEMS associated heater function is verified
to operate normally before each
departure.
C 2 0 May be inoperative provided associated
heater is considered inoperative.
19. DRAIN MAST HEATERS C 2 0 (M) May be inoperative provided water
supply to associated components is
secured off.
PLACARD
DRAIN MAST HEATERS INOP
Affected drains and sinks (lavatory, galley, or fountain) - INOP
MAINTENANCE (M)
Turn off water supply to associated components and deactivate inoperative drain mast heaters.
1) Close the associated water supply shutoff valves (lavatory, galley or fountain)
2) Deactivate both drain mast heaters by opening and collaring the following circuit breakers on
the P- 18 panel:
A) DRAIN MAST GND
B) DRAIN MAST AIR
NOTE: There is no procedure available for independently deactivating a single drain mast
heater for dispatch.
DRAIN MAST GND and DRAIN MAST AIR
AIRCRAFT: B737-200 ISSUE: 02 REV: 0 01 JULY, 2019
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/09/2018 Revision 60.
MINIMUM EQUIPMENT LIST Page 30 - 19
B737-200 MEL ISSUE: 02 REV: 00 01 October, 2017
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/13/2017 Revision 59.
Page 19 of 20
MINIMUM EQUIPMENT LIST Page 30 - 20
INTENTIONALLY LEFT BLANK
B737-200 MEL ISSUE: 02 REV: 00 01 October, 2017
Based on FAA Accepted MMEL for Boeing 737-200 dated 02/13/2017 Revision 59.
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