Installation of the Rear Navigation and Strobe Light Assembly

TASK 33-41-17-400-801-A
Installation of the Rear Navigation and Strobe Light Assembly

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

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: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

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

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

ZONE: 317
FIN: 16LA ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06BHG1)	Silicone Sealant-Firewall High Temp. -
(Material No.14SBA1)	Textile-Lint free Cotton -

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
317	TAIL CONE APU AND ACCESSORY COMPARTMENT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 33-41-00-710-001-A	Operational Test of the Navigation Lights
TASK 33-48-00-710-002-A	Operational Test of the Anti-Collision/Strobe Lighting
Rear Navigation and Strobe Light Assembly

3. Job Set-up
Subtask 33-41-17-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) In the cockpit, on panel 25VU:

Make sure that the STROBE switch is in the OFF position.
Make sure that the NAV & LOGO switch is in the OFF position.
Make sure that the APU MASTER SW pushbutton switch is in the OFF position.
Make sure there is a warning notice to tell persons not to operate the navigation lights or the strobe lights.
Make sure there is a warning notice to tell persons not to operate the APU.

Subtask 33-41-17-865-051-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
122VU	LIGHT/EXT LT NAV1/AND LOGO/LT	1LA	T03
122VU	LIGHTING/EXT LT/NAV2/AND LOGO/LT	2LA	T02
122VU	LIGHTING/WING/STROBE	10LV	V05

Subtask 33-41-17-941-053-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is in position at the APU tail-cone-exhaust area.

4. Procedure
Subtask 33-41-17-910-050-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.

Subtask 33-41-17-420-050-A ** ON A/C NOT FOR ALL

B. Installation of the Rear Navigation and Strobe Light Assembly
(1) Remove the blanking caps from the electrical connectors (5) and (6).
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Connect the electrical connectors (5) and (6) to the rear navigation and strobe light assembly (3).
(4) Put the rear navigation and strobe light assembly (3) in position on the APU exhaust access-fairing (4).
(5) Install the screws (1) and the washers (2).
(6) Tighten the screws (1).
(7) Clean the outer side of the rear navigation and strobe light assembly (3) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(8) Apply the Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) to all the sides of the mating flange of the rear navigation and strobe light assembly (3), the washers (2) and the screws (1).

Subtask 33-41-17-865-052-A ** ON A/C NOT FOR ALL

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
122VU	LIGHT/EXT LT NAV1/AND LOGO/LT	1LA	T03
122VU	LIGHTING/EXT LT/NAV2/AND LOGO/LT	2LA	T02
122VU	LIGHTING/WING/STROBE	10LV	V05

Subtask 33-41-17-710-050-A ** ON A/C NOT FOR ALL

D. Test
(1) Do the operational test of the rear navigation and strobe light assembly (Ref. AMM TASK 33-41-00-710-001) and (Ref. AMM TASK 33-48-00-710-002).

5. Close-up
Subtask 33-41-17-942-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).

Subtask 33-41-17-862-051-A ** ON A/C NOT FOR ALL

B. Make sure that the aircraft electrical circuits are de-energized
(Ref. AMM TASK 24-41-00-862-002).

Subtask 33-41-17-860-051-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 00:55:11 UTC