Application of Structural Paint Protection to Prevent Corrosion Damage on the Seat Pan

TASK 25-11-00-370-801-A
Application of Structural Paint Protection to Prevent Corrosion Damage on the Seat Pan

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

ZONE: 211
ZONE: 212

1. Reason for the Job

NOTE: This procedure is only applicable for the Captain and First Officer seats. (P/N TAAI3-03 series only).

NOTE: This procedure gives the repair instructions to apply protection to prevent corrosion damage on the seat pan.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04QAC5)	Coating-- Corrosion Inhibiting Fastener Head Protection

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT
212	COCKPIT

D. 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)
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 25-11-61-000-001-A	Removal of the Captain (First Officer) Seat Cushion
TASK 25-11-61-400-001-A	Installation of the Captain (First Officer) Seat Cushion
Structural Paint Protection on the Seat Pan

3. Job Set-up
Subtask 25-11-00-861-052-A

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

Subtask 25-11-00-865-056-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 3MS (SEATCAPTAIN)
122VU	COCKPIT SEATS/SEAT CTL/CAPT	1MS1	U11
122VU	LIGHTING/FLOOD/CAPT/SIDE	5LE	Z05
FOR FIN: 4MS (SEATF/O)
122VU	COCKPIT SEATS/SEAT CTL/F/O	1MS2	U14
122VU	LIGHTING/FLOOD/F/O/SIDE	4LE	Z06

Subtask 25-11-00-010-052-A

C. Get Access
(1) Remove the Captain (First Officer) seat cushions (Ref. AMM TASK 25-11-61-000-001).

4. Procedure
Subtask 25-11-00-370-051-A

A. Application of Structural Paint Protection to Prevent Corrosion Damage on the Seat Pan

Structural Paint Protection on the Seat Pan

NOTE: We recommend that you send the report of the corrosion removal to STELIA AEROSPACE for the Airworthiness Justification and Approval.

(1) Do a visual inspection of the screw heads on the seat pan at the applicable locations:
(a) If there is no corrosion damage, apply Coating-- Corrosion Inhibiting Fastener Head Protection (Material No.04QAC5) on the screw heads of the seat pan at the applicable locations.
(b) If you find corrosion damage:
1 Remove the applicable screws and examine the screw threads and the screw holes in the seat pan.
a If you find corrosion damage on them:

Replace the seat pan and the screws, refer to the applicable CMM.
Apply Coating-- Corrosion Inhibiting Fastener Head Protection (Material No.04QAC5) on the screw heads at the applicable locations.

b If you do not find corrosion damage on them:

Remove and discard the screws with corrosion and install new screws, refer to the applicable CMM.
Apply Coating-- Corrosion Inhibiting Fastener Head Protection (Material No.04QAC5) on new screw heads at the applicable locations.

(2) Do a visual inspection of the threaded inserts on the seat pan at the applicable location:
(a) If there is no corrosion damage, apply Coating-- Corrosion Inhibiting Fastener Head Protection (Material No.04QAC5) on the threaded inserts of the seat pan at the applicable locations.
(b) If you find corrosion damage on them:
1 Replace the seat pan, refer to the applicable CMM.
2 Apply Coating-- Corrosion Inhibiting Fastener Head Protection (Material No.04QAC5) on the threaded inserts at the applicable locations.
(3) Do a visual inspection of the seat pan:
(a) If there is corrosion damage, send detailed images of the seat pan with corrosion to STELIA AEROSPACE with the applicable dimensions.
1 If the corrosion removal procedure is permitted, then refer to the applicable CMM for the repair procedure.
2 If the corrosion removal procedure is not permitted:
a Replace the seat pan, refer to the applicable CMM for the replacement procedure.
(b) If there is no corrosion damage, do a check for other damage:
1 If you find other damage, refer to the applicable CMM for the repair procedure.
2 If you do not find other damage, no more steps are necessary.

5. Close-up
Subtask 25-11-00-410-052-A

A. Close Access
(1) Install the Captain (First Officer) seat cushions (Ref. AMM TASK 25-11-61-400-001).

Subtask 25-11-00-865-057-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 3MS (SEATCAPTAIN)
122VU	COCKPIT SEATS/SEAT CTL/CAPT	1MS1	U11
122VU	LIGHTING/FLOOD/CAPT/SIDE	5LE	Z05
FOR FIN: 4MS (SEATF/O)
122VU	COCKPIT SEATS/SEAT CTL/F/O	1MS2	U14
122VU	LIGHTING/FLOOD/F/O/SIDE	4LE	Z06

Subtask 25-11-00-862-052-A

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

Subtask 25-11-00-942-052-A

D. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.03.31 23:27:56 UTC