Installation of the Landing Light

TASK 33-42-11-400-003-A
Installation of the Landing Light

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

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: 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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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.

FIN: 7LB
FIN: 8LB

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 2.5 and 2.1 m.N (22.12 and 18.58 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06CMD9)	Silicone Adhesive Sealant-General Purpose One part legacy
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ACB1)	Corrosion Preventive Compound-Heavy Duty Hard Film -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	SEAL	AIPC 33-42-11-01-050

D. Referenced Information

REFERENCE	DESIGNATION
TASK 33-42-00-600-801-A	Lubrication of the Retractable Landing Lights
TASK 33-42-00-710-001-A	Operational Test of the Landing Lights
Landing Light 7LB (8LB)

3. Job Set-up
Subtask 33-42-11-941-055-A

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the WARNING NOTICE(S) is in the cockpit to tell persons not to operate the landing lights.

Subtask 33-42-11-865-051-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

Subtask 33-42-11-860-050-A

C. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position.

4. Procedure
Subtask 33-42-11-420-050-A

A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) If the seal (3) is damaged you must replace it as follows:
(a) Remove and discard the seal (3).
(b) Clean the light assembly interface with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(c) Apply Prime coating 1200 on the light assembly (1) and install the AIPC 33-42-11-01-050 SEAL (3) with Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) .
(5) If you install the assembly you removed, examine the lamp reflector, the lamp glass and the electrical connector for correct condition.

Subtask 33-42-11-420-052-C

B. Installation of the Landing Light
(1) Install the light assembly (1) on the wing bottom skin.
(2) Install the screws (2).
(3) TORQUE the screws (2) to between 2.5 and 2.1 m.N (22.12 and 18.58 lbf.in )

.
(4) Remove the blanking cap from the electrical connector (4).
(5) Make sure that the electrical connector (4) is in the correct condition.
(6) Connect the electrical connector (4) to the light assembly (1). Make sure that the electrical connector orientation lets you install a drip loop

Landing Light 7LB (8LB)

(7) Clean the electrical connector (4) with the Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(8) Apply a continuous layer of Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the electrical connector (4).
(9) Lubricate the retractable landing-lights mechanism (Ref. AMM TASK 33-42-00-600-801).

Subtask 33-42-11-865-058-A

C. Remove the safety clip(s) and the tag(s) and close 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

Subtask 33-42-11-710-051-A

D. Operational Test
(1) Do an operational test of the applicable landing light (Ref. AMM TASK 33-42-00-710-001).
(2) Clean the landing light glass with a clean Textile-Lint free Cotton - (Material No.14SBA1) .

5. Close-up
Subtask 33-42-11-942-050-A

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:55:20 UTC