Removal of the Flash Tube Assembly of the Lower Beacon Light

TASK 33-48-12-000-002-A
Removal of the Flash Tube Assembly of the Lower Beacon Light

WARNING: ISOLATE THE ELECTRICAL CIRCUITS FROM THE RELATED EQUIPMENT AND THE ENVIRONMENT.

WARNING: DO NOT TOUCH THE STROBE LIGHTS FOR AT LEAST 5 MINUTES AFTER OPERATION. THE STROBE LIGHT WILL STILL BE HOT.

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.

ZONE: 190
FIN: 6LV ** 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	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	STEPLADDER 1.0 M (3.3 FT)
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT

C. Referenced Information

REFERENCE	DESIGNATION
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)
Flash Tube Assembly of the Lower Beacon Light ** ON A/C NOT FOR ALL
Flash Tube Assembly of the Lower Beacon Light ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 33-48-12-861-054-B ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)

Subtask 33-48-12-941-050-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Put a WARNING NOTICE(S) on panel 25VU to tell persons not to operate the strobe lights or the navigation lights.

Subtask 33-48-12-865-056-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	LIGHTING/EXT LT/BEACON/LOWER	5LV	U03

Subtask 33-48-12-010-051-A ** ON A/C NOT FOR ALL

D. Make sure that switch 2LV BEACON ON-OFF on overhead panel 25VU is in the OFF position.
(1) Put the STEPLADDER 1.0 M (3.3 FT) in position below the related panel.

4. Procedure
Subtask 33-48-12-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Flash Tube Assembly of the Lower Beacon/Strobe Light 6LV
(1) Remove the countersunk screws (2) from the structure (9).
(2) Remove the lens (4) and the seal (5).
(3) Remove the countersunk screws (1) from the light assembly (8).
(4) Lift the light assembly (8) until you can see the electrical connectors (7).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(5) Disconnect the electrical connectors (7) from the light assembly (8).
(6) Remove the flash tube assembly (6) from the light assembly (8).
(7) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

Subtask 33-48-12-020-052-GK ** ON A/C NOT FOR ALL

A. Removal of the Flash Tube Assembly of the Lower Beacon/Strobe Light
(1) Remove the countersunk screws (3) from the structure (1).
(2) Remove the lens (5) and the seal (6).
(3) Remove the countersunk screws (2) from the light assembly (10).
(4) Remove the faraday cage (7) from the light assembly (10).
(5) Pull the flash tube assembly (8) until you can see the electrical connectors (9).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(6) Disconnect the electrical connectors (9).
(7) Remove the flash tube assembly (8) from the light assembly (10).
(8) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

[Rev.10 from 2021] 2026.04.01 00:56:29 UTC