Removal of the Rear Navigation-Light Adaptor-Plate

TASK 33-41-18-000-801-A
Removal of the Rear Navigation-Light Adaptor-Plate

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.

ZONE: 317
FIN: 17LA ** 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
TASK 33-41-17-000-801-A	Removal of the Rear Navigation and Strobe Light Assembly
TASK 52-41-18-000-001-A	Removal of the APU Exhaust Access-Fairing
Rear Navigation-Light Adaptor-Plate

3. Job Set-up
Subtask 33-41-18-941-053-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 33-41-18-865-050-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 33-41-18-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position in the APU tail-cone-exhaust area.
(2) Remove the APU-exhaust access-fairing (Ref. AMM TASK 52-41-18-000-001) or, as an alternative, the rear navigation and strobe light assembly (Ref. AMM TASK 33-41-17-000-801).

4. Procedure
Subtask 33-41-18-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Rear Navigation-Light Adaptor-Plate
(1) Disconnect the electrical connectors (1) and (4).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the screws (7) and washers (6).
(4) Remove the screw (2) and washer (3).
(5) Remove the rear navigation-light adaptor-plate (5) from the APU-exhaust access fairing.

[Rev.10 from 2021] 2026.04.01 00:55:12 UTC