Bonding of the Pins on the Accoustic Bulkhead (APS 3200)

TASK 49-20-00-340-001-A
Bonding of the Pins on the Accoustic Bulkhead (APS 3200)

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

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	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	SOLDERING IRON

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05EML8)	Epoxy Adhesive-- - Legacy 2
(Material No.08BAA9)	Non Aqueous Cleaner-General - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 52-41-00-010-001-A	Open the APU Doors for Access
TASK 52-41-00-410-001-A	Close the APU Doors after Access
Bonding of the Pins

3. Job Set-up
Subtask 49-20-00-860-060-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Put the warning notice on panel 25VU to tell persons not to start the APU.
(2) Energize the ground service network
(Ref. AMM TASK 24-41-00-861-002).
(3) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-14-00-614-001).

Subtask 49-20-00-865-079-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-20-00-010-063-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the APU access doors 315AL 316AR.
(2) Open the APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the light switch 11LJ to on.

4. Procedure
Subtask 49-20-00-915-050-A ** ON A/C NOT FOR ALL

A. Bonding of the pins on the Accoustic Bulkhead
(1) Removal of the pins.
(a) Warm up the pins (1) and (2) with SOLDERING IRON and remove the pins with a tong.
(2) Prepare the pins for installation.
(a) Clean the pins and the related area of accoustic bulkhead with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Mix the Epoxy Adhesive-- - Legacy 2 (Material No.05EML8) . Obey the manufacture instruction.
(c) Apply a thin layer of the Epoxy Adhesive-- - Legacy 2 (Material No.05EML8) to the pins.
(d) Install the pins.
(e) Apply pressure to the pins and let it harden. Using a heat lamp. Hardening times as follows:

8 hours at 20 DEG.C (68.00 DEG.F)
6 hours at 60 DEG.C (140.00 DEG.F)
15 minutes at 80 DEG.C (176.00 DEG.F)
10 minutes at 100 DEG.C (212.00 DEG.F)

5. Close-up
Subtask 49-20-00-865-090-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-20-00-410-065-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Set the light switch 11LJ to off.
(3) Close the access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).

Subtask 49-20-00-860-061-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the ground service network
(Ref. AMM TASK 24-41-00-862-002).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:42:39 UTC