Installation of the Power Supply Unit of the Tail Cone Strobe-Light

TASK 33-48-39-400-001-A
Installation of the Power Supply Unit of the Tail Cone Strobe-Light

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

FIN: 18LV

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 4M (13 FT)-ADJUSTABLE
No specific	AR	SCRAPER - NON METALLIC

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AAA1)	Polysulfide Sealant_General Purpose Brushable -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
314AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-720-005-A	Check of the Electrical Bonding of the Different Components (but not the Fluid Systems and Components Installed on Composite materials)
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 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 33-48-00-710-002-A	Operational Test of the Anti-Collision/Strobe Lighting

3. Job Set-up
Subtask 33-48-39-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the access door 314AR.
(2) Make sure that the access door 314AR is open.
(3) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).

Subtask 33-48-39-865-051-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/WING/STROBE	10LV	V05

Subtask 33-48-39-010-052-A

C. Get Access
(1) Be careful not to step on a closed access door.
(2) Open access door 314AR and safety it in the open position.
(3) Set the light switch to on.

4. Procedure
Subtask 33-48-39-910-050-A

A. Preparation for Installation
(1) Do an inspection of the component interfaces and the adjacent area.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Clean the component interfaces and the adjacent area.
(4) Remove the used sealant from the ground bonding surface of the support and the power supply unit with a SCRAPER - NON METALLIC.
(5) Make sure that the ground bonding surfaces have no signs of paint, sealant or corrosion.
(6) Clean the ground bonding surfaces with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 33-48-39-420-050-A

B. Installation of the Power Supply Unit (18LV)
(1) Make sure that the ground bonding attachment point is clean (Ref. AMM TASK 20-28-00-912-802).
(2) Install the power supply unit (1) with the washers (3) and the screws (2).
(3) Tighten the screws (2) diagonally opposite.
(4) Remove the CAP-BLANKING from each electrical connector and receptacle.
(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Connect the electrical connectors (4) and (5).
(7) Apply Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) to the ground bonding attachment point.
(8) Make sure that the bonding contact resistance between the power supply unit and the support is not higher than 10 milliohms (Ref. AMM TASK 20-28-00-720-005).

Subtask 33-48-39-865-052-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/WING/STROBE	10LV	V05

Subtask 33-48-39-710-050-A

D. Do the operational test of the anti-collision/strobe lighting (Ref. AMM TASK 33-48-00-710-002).

5. Close-up
Subtask 33-48-39-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 314AR.
(3) Remove the access platform(s).

Subtask 33-48-39-862-050-A

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:56:49 UTC