Installation of the Hot Nozzle and the Bellows (131-9(A))

TASK 49-81-42-400-003-A
Installation of the Hot Nozzle and the Bellows (131-9(A))

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

ZONE: 315
ZONE: 316

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	Torque wrench: range to between 0.22 and 0.2 m.daN (19.47 and 17.70 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315	TAIL CONE APU AND ACCESSORY COMPARTMENT
316	TAIL CONE APU AND ACCESSORY COMPARTMENT
315AL, 316AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-81-41-000-003-A	Removal of the Exhaust Muffler (131-9(A))
TASK 49-81-41-400-003-A	Installation of the Exhaust Muffler (131-9(A))
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
TASK 52-41-18-000-001-A	Removal of the APU Exhaust Access-Fairing
TASK 52-41-18-400-001-A	Installation of the APU Exhaust Access-Fairing
Hot Nozzle and Bellows

3. Job Set-up
Subtask 49-81-42-860-056-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) On the panel 25VU make sure that the APU MASTER SW p/bsw is OFF.
(3) Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(5) Make sure that the access platform is in position below the APU compartment.
(6) Make sure that the APU access doors are open (Ref. AMM TASK 52-41-00-010-001).
(7) Set the LIGHT SW 11LJ to the ON position.
(8) Make sure that the APU exhaust access-fairing 317AL is removed (Ref. AMM TASK 52-41-18-000-001).
(9) Make sure that the exhaust muffler is removed (Ref. AMM TASK 49-81-41-000-003).

Subtask 49-81-42-865-057-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 49-81-42-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the Hot Nozzle and the Bellows
(1) Install the bellows (3) on the exhaust muffler (5).
(2) Install the clamp (4) on the bellows (3).
(3) TORQUE the clamp (4) to between 0.22 and 0.2 m.daN (19.47 and 17.70 lbf.in )

.
(4) Install the hot nozzle (1) on the exhaust muffler (5).
(5) Install the drain line (8) on the six o'clock position of the hot nozzle (1) with the clamp (7).
(6) Install the drain line (10) on the drain line (8) with the clamp (9).
(7) Tighten the clamps (7) and (9).
(8) Install the clamp (2) on the bellows (3).
(9) TORQUE the clamp (2) to between 0.22 and 0.2 m.daN (19.47 and 17.70 lbf.in )

.
(10) Install the exhaust muffler (5) (Ref. AMM TASK 49-81-41-400-003).

5. Close-up
Subtask 49-81-42-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Set the LIGHT SW 11LJ to the OFF position.
(3) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Install the APU exhaust access-fairing (Ref. AMM TASK 52-41-18-400-001).
(5) Remove the access platform(s).

Subtask 49-81-42-865-058-A ** ON A/C NOT FOR ALL

B. 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 49-81-42-860-058-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 24-42-00-862-001).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 01:32:46 UTC