Check of the Lightning Protection Modules

TASK 24-22-51-200-001-A
Check of the Lightning Protection Modules

WARNING: MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.

FIN: 19XU1
FIN: 19XU2

1. Reason for the Job
The crew has made an entry in the log book for a lightning.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	LIGHT SOURCE - INSPECTION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
121AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-22-51-000-001-A	Removal of the Lightning Protection Modules
TASK 24-22-51-400-001-A	Installation of the Lightning Protection Modules
TASK 25-11-41-000-001-A	Removal of the Third Occupant Seat
TASK 25-11-41-400-001-A	Installation of the Third Occupant Seat

3. Job Set-up
Subtask 24-22-51-010-052-A

A. Get Access
(1) If necessary, remove the Third Occupant seat (Ref. AMM TASK 25-11-41-000-001).
(2) In the cockpit, on the rear panel 120VU, open the panel which gives access to the AC power center 123VU.
(3) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position at the access door 121AL.
(4) Open the access door 121AL.

Subtask 24-22-51-860-052-A

B. Safety Precautions
(1) Make sure that the external power connector is not connected to the aircraft EXT PWR receptacle.
(2) Put a warning notice on the access door 121AL to tell persons not to connect the external power connector to the aircraft EXT PWR receptacle.
(3) In the cockpit, on the ELEC panel 35VU, make sure that these pushbutton switches are released:

APU GEN,
BAT 1, BAT 2,
GEN 1, GEN 2,
EXT PWR.

(4) In the cockpit, put WARNING NOTICE(S) to tell persons not to operate the pushbutton switches on these overhead panels:

21VU (EMER ELEC PWR),
25VU (APU),
35VU (ELEC).

4. Procedure
Subtask 24-22-51-210-050-A

A. Inspection
(1) With an LIGHT SOURCE - INSPECTION, do a visual check of the external condition of the lightning protection modules and of the adjacent area to find:

on each lightning protection module:
. cracks,
. blisters.
in the adjacent area:
. projections of black or/and white spots.

(2) Replace the lightning protection module if at least one of these damages is found (Ref. AMM TASK 24-22-51-000-001) and (Ref. AMM TASK 24-22-51-400-001).

5. Close-up
Subtask 24-22-51-410-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) In the cockpit, on the rear panel 120VU, close the panel which gives access to the AC power center 123VU.
(3) If removed, install the Third Occupant seat (Ref. AMM TASK 25-11-41-400-001).
(4) Remove the WARNING NOTICE(S).
(5) Close the access door 121AL.
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:22:15 UTC