Removal of the Rear Navigation and Strobe Light Assembly

TASK 33-41-17-000-801-A
Removal 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: DO NOT TOUCH THE STROBE LIGHTS FOR AT LEAST 5 MINUTES AFTER OPERATION. THE STROBE LIGHT WILL STILL BE HOT.

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

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

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 5M (16 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
Rear Navigation and Strobe Light Assembly

3. Job Set-up
Subtask 33-41-17-941-055-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.
Put a WARNING NOTICE(S) to tell persons not to operate the navigation lights or the strobe lights.
Put a WARNING NOTICE(S) to tell persons not to operate the APU.

Subtask 33-41-17-865-050-A ** ON A/C NOT FOR ALL

B. Open, safety and tag 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 33-41-17-941-050-A ** ON A/C NOT FOR ALL

C. Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at the APU tail-cone-exhaust area.

4. Procedure
Subtask 33-41-17-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Rear Navigation and Strobe Light Assembly

WARNING: DO NOT REMOVE THE STROBE LIGHT FOR AT LEAST TEN MINUTES AFTER YOU DE-ENERGIZE THE ELECTRICAL CIRCUITS. THE HIGH VOLTAGE ELECTRICAL CURRENT IN THE CAPACITOR OF THE STROBE LIGHT IS DANGEROUS.

(1) Hold the rear navigation and strobe light assembly (3).
(2) Remove the screws (1) and washers (2).
(3) Remove the rear navigation and strobe light assembly (3) from the APU exhaust access-fairing (4).
(4) Disconnect the electrical connectors (5) and (6) from the rear navigation and strobe light-assembly (3).
(5) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

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