Removal of the Landing Light Lamp

TASK 33-42-11-000-002-A
Removal of the Landing Light Lamp

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: WEAR GLASSES AND PROTECTIVE CLOTHING WHEN YOU DO WORK ON THE LIGHT. THE LAMP IS PRESSURIZED AND AN EXPLOSION CAN OCCUR.

WARNING: MAKE SURE THAT THERE ARE NO SIGNS OF FUEL CONTAMINATION IN THE LANDING LIGHT ASSEMBLY. IF YOU FIND FUEL CONTAMINATION, NO PERSON MUST OPERATE THE LANDING LIGHT UNTIL:

YOU REPAIR THE FUEL LEAK
YOU REPLACE THE LANDING LIGHT ASSEMBLY.

IF YOU DO NOT OBEY THIS PRECAUTION, IGNITION OF THE REMAINING FUEL IN THE LANDING LIGHT CAN OCCUR.

CAUTION: WHEN YOU REPLACE A LANDING LIGHT LAMP, EXAMINE THE APPLICABLE LANDING LIGHT ASSEMBLY FOR SIGNS OF FUEL CONTAMINATION. IF YOU FIND FUEL CONTAMINATION, EXAMINE THE ITEMS THAT FOLLOW FOR SIGNS OF FUEL LEAKAGE:

THE FUEL PUMP(S) 21QA(26QA) OR 25QA(22QA)
THE WATER DRAIN VALVE 25QM(26QM) DIRECTLY FORWARD OF THE LANDING LIGHT ASSEMBLY.

REFER TO AMM 28-11-00-06 FOR LEAKAGE LIMITS AND REPAIR AS NECESSARY. IF YOU DO NOT REPAIR THE LEAK, NO PERSONS MUST OPERATE THE APPLICABLE LANDING LIGHT UNTIL:

THE LEAK IS REPAIRED
THE LANDING LIGHT ASSEMBLY IS REPLACED.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 28-11-00-280-002-A	Structural Fuel Tank Leaks - General Information
TASK 28-11-41-000-003-A	Removal of the Water Drain Valve
TASK 28-21-51-000-001-A	Removal of the Fuel Pumps
GE landing-light lamp
LED landing light-lamp

3. Job Set-up
Subtask 33-42-11-941-053-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the landing lights.

Subtask 33-42-11-010-051-A

B. Get Access
(1) Put an ACCESS PLATFORM 1M(3 FT) in position below the applicable landing light.

Subtask 33-42-11-860-051-A

C. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Extend the landing light:
(a) At zone 571(671), make sure that the travel range of the landing light is clear.
(b) In the cockpit, on the EXT LT section of panel 25VU, set the LAND L(R) switch to OFF.
(c) Make sure that the landing light extends.

Subtask 33-42-11-865-055-A

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/LANDING LT/R/CTL	4LB	T07
122VU	LIGHTING/LANDING LT/R/SPLY	2LB	T06
122VU	LIGHTING/LANDING LT/L/CTL	3LB	T05
122VU	LIGHTING/LANDING LT/L/SPLY	1LB	T04

4. Procedure
Subtask 33-42-11-210-059-A

A. Examine the landing light assembly for fuel contamination.
(1) Examine the landing light assembly for signs of fuel contamination.
(2) If you find fuel contamination, examine the items that follow for fuel leakage:

Fuel pumps 21QA(26QA) and 25QA(22QA) (Ref. AMM TASK 28-21-51-000-001)
Water drain valve 25QM(26QM) (Ref. AMM TASK 28-11-41-000-003)
The wing tank structure (Ref. AMM TASK 28-11-00-280-002).

(3) Repair the leak(s) as necessary.

Subtask 33-42-11-020-052-A

GE landing-light lamp

LED landing light-lamp

(1) For the General Electric (GE) sealed-beam landing-light lamp, do these steps:

WARNING: WEAR GLASSES AND PROTECTIVE CLOTHING WHEN YOU DO WORK ON THE LIGHT. THE LAMP IS PRESSURIZED AND AN EXPLOSION CAN OCCUR.

CAUTION: DO NOT TOUCH THE LAMP GLASS WITH YOUR FINGERS. THE OILS FROM YOUR SKIN WILL QUICKLY CAUSE DETERIORATION OF THE LAMP. IF YOU ACCIDENTALLY TOUCH THE LAMP GLASS, CLEAN IT WITH A LINT- FREE CLOTH. IF NECESSARY, MAKE THE CLOTH MOIST WITH WATER. DRY WITH LOW-PRESSURE COMPRESSED AIR JET. DO NOT USE ALCOHOL.

(a) Hold the GE sealed-beam landing-light lamp (7) and remove the screw (5) and the clamp (6).
(b) Examine the clamp (6). If the clamp (6) is defective remove and discard it.
(c) Remove the GE sealed-beam landing-light lamp (7) from the lamp housing (1) to get access to the two electrical terminals (3).
(d) Remove the screws (2) and disconnect the two electrical terminals (3).
(e) Remove the GE sealed-beam landing-light lamp (7).
(f) Examine the seal (4) on the lamp housing (1).
(g) If the seal (4) is defective, remove and discard it.
(2) For the LED landing light-lamp, do these steps:

WARNING: WEAR GLASSES AND PROTECTIVE CLOTHING WHEN YOU DO WORK ON THE LIGHT. THE LAMP IS PRESSURIZED AND AN EXPLOSION CAN OCCUR.

(a) Hold the LED landing light-lamp (3) and remove the screw (4) and the clamp (5).
(b) Examine the clamp (5). If the clamp (5) is defective remove and discard it.
(c) Pull the LED landing light-lamp (3) away from the lamp housing (1) to get access to the electrical terminals.
(d) Disconnect the electrical terminals.
(e) Remove the LED landing light-lamp (3).
(f) Examine the seal (2) on the lamp housing (1).
(g) If the seal (2) is defective, remove and discard it.

[Rev.10 from 2021] 2026.04.01 00:55:21 UTC