Removal of the Lightning Protection Modules

TASK 24-22-51-000-001-A
Removal of the Lightning Protection Modules

ZONE: 212
FIN: 19XU1
FIN: 19XU2

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 1M (3 FT)-ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
212	COCKPIT
121AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 25-11-41-000-001-A	Removal of the Third Occupant Seat
Lightning Protection Module ** ON A/C NOT FOR ALL
Lightning Protection Module ** ON A/C NOT FOR ALL
FOR [19XU1] (MODULE-LIGHTNING PROT, 1)
TASK 24-22-55-000-001-A	Removal of the Contactors
FOR [19XU2] (MODULE-LIGHTNING PROT, 2)
TASK 24-22-55-000-001-A	Removal of the Contactors

3. Job Set-up
Subtask 24-22-51-010-050-A ** ON A/C NOT FOR ALL

A. Get Access
(1) FOR [19XU1] (MODULE-LIGHTNING PROT, 1)
Remove the contactor 9XU1.
(Ref. AMM TASK 24-22-55-000-001)
(2) FOR [19XU2] (MODULE-LIGHTNING PROT, 2)
Remove the contactor 9XU2.
(Ref. AMM TASK 24-22-55-000-001)

Subtask 24-22-51-010-050-B ** ON A/C NOT FOR ALL

A. Get Access
(1) If necessary, remove the Third Occupant seat (Ref. AMM TASK 25-11-41-000-001).
(2) On the L lower side of the panel 120VU, remove the access door.
(3) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position at the access door 121AL.
(4) Open the access door 121AL.

Subtask 24-22-51-860-053-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the external power connector is not connected to the aircraft EXT PWR receptacle.
(2) Put warning notice(s) in position 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 these pushbutton switches are released:

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

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

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

4. Procedure
Subtask 24-22-51-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Lightning Protection Module
(1) Loosen and remove the screw (1).
(2) Remove the lightning protection module (3).

Subtask 24-22-51-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Lightning Protection Module
(1) Loosen and remove the screw (1).
(2) Remove the bonding lead (2).
(3) On the module 30XN1 (30XN2), loosen and remove the screws (4) and the washers (5).
(4) Remove the lightning protection module (3).

[Rev.10 from 2021] 2026.03.31 23:22:12 UTC