Cleaning of the APU Compartment without the APU Installed

TASK 49-00-00-100-804-A
Cleaning of the APU Compartment without the APU Installed

WARNING: YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:

ON THE THS OR IN THE REAR FUSELAGE
ON TOP OF THE WINGS OR PYLONS.

WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

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

FIN: 4005KM ** ON A/C NOT FOR ALL

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	CLEANING EQUIPMENT - STEAM
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - PLASTIC
No specific	AR	SAFETY BARRIER(S)
No specific	1	SPONGE
No specific	1	SPRAYING EQUIPMENT - LOW PRESSURE
No specific	AR	TIE WRAP(S)
No specific	AR	WARNING NOTICE(S)
98L12003001000	AR	HARNESS,SAFETY

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08ABD1)	Aqueous Cleaner-Aircraft Exterior Gel Type -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 49-11-11-000-003-A	Removal of the Power Plant (APU) (APS 3200)
TASK 49-11-11-400-003-A	Installation of the Power Plant (APU) (APS 3200)
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound
TASK 26-13-00-00	APU FIRE AND OVERHEAT DETECTION - DESCRIPTION AND OPERATION
TASK 49-12-00-00-12	APU MOUNTS - DESCRIPTION AND OPERATION
TASK 49-16-00-00-12	AIR INTAKE SYSTEM - DESCRIPTION AND OPERATION
TASK 49-51-00-00-12	BLEED AND SURGE AIR - DESCRIPTION AND OPERATION
TASK 52-40-00-00	SERVICE - DESCRIPTION AND OPERATION

3. Job Set-up
Subtask 49-00-00-941-089-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Put the WARNING NOTICE(S) in position on overhead control and indicator panel 25VU to tell persons not to start the APU.
(3) Put on and attach the HARNESS, SAFETY before you start work in the work area.

Subtask 49-00-00-020-057-A ** ON A/C NOT FOR ALL

B. Remove the Power Plant (APU) (APS 3200) (Ref. AMM TASK 49-11-11-000-003).

Subtask 49-00-00-950-050-A ** ON A/C NOT FOR ALL

C. Electrical Cables Protection
(1) Remove the electrical cables from the starter motor and the generator cables from their temporary position (related forward Left Hand (LH) and Right Hand (RH) tie rods).
(2) Put the COVER - PLASTIC around the cables to prevent unwanted humidity when you do the cleaning.
(3) Put the COVER - PLASTIC around the electrical harness connections located at the front firewall (FR80) to prevent the unwanted humidity when you do the cleaning.

4. Procedure

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

CAUTION: DO NOT POINT THE SPRAY INTO THE APU INTAKE-DUCT. WATER CAN GO INTO THE FELT METAL AND FREEZE. THIS WILL CAUSE DAMAGE TO THE INTAKE DUCT AND MAKE IT UNSERVICEABLE.

Subtask 49-00-00-160-063-A ** ON A/C NOT FOR ALL

A. Cleaning of the APU Compartment and the Removed APU Access Doors
(1) Make a solution of 50 per cent water and 50 per cent Aqueous Cleaner-Aircraft Exterior Gel Type - (Material No.08ABD1) in the CONTAINER 5 L (1.32 USGAL).
(2) Apply the solution with the SPONGE on the walls of the APU compartment and the removed APU access doors (doors).

NOTE: On the doors, apply the solution only on the walls related to the APU compartment room.

(3) Let the solution stay on the surface for 20 minutes.
(4) Flush the surface with warm clean water.

Subtask 49-00-00-160-064-A ** ON A/C NOT FOR ALL

B. Alternative Procedure
(1) Spray the solution (50 per cent water and 50 per cent Aqueous Cleaner-Aircraft Exterior Gel Type - (Material No.08ABD1) ) with the SPRAYING EQUIPMENT - LOW PRESSURE on the APU compartment and the removed doors.

NOTE: On the doors, apply the solution only on the walls related to the APU compartment room.

(2) Let the solution stay on the surface for 20 minutes.
(3) Flush the surface with the CLEANING EQUIPMENT - STEAM (temperature 70 DEG.C (158.00 DEG.F)) at the lowest pressure.

Subtask 49-00-00-620-050-A ** ON A/C NOT FOR ALL

C. Apply Special Materials
(1) Examine, and repair if necessary, the remaining layers of the subsequent areas and components (Ref. AMM TASK 51-75-13-916-002):

Fire detection loop brackets (Ref. AMM D/O 26-13-00-00)
APU mounts (Ref. AMM D/O 49-12-00-00)
Vibration isolators (Ref. AMM D/O 49-12-00-00)
Bleed air duct (Ref. AMM D/O 49-51-00-00)
Access doors hinges (Ref. AMM D/O 52-40-00-00)
Air intake duct (Ref. AMM D/O 49-16-00-00).

5. Close-up
Subtask 49-00-00-420-057-A ** ON A/C NOT FOR ALL

A. Installation of Components
(1) Remove the COVER - PLASTIC from the electrical cables.
(2) Remove the COVER - PLASTIC from the electrical harness connections.
(3) Install the electrical cables with the TIE WRAP(S) in their temporary position (forward LH and RH tie rods).
(4) Install the Power Plant (APU) (APS 3200) (Ref. AMM TASK 49-11-11-400-003).

Subtask 49-00-00-860-207-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) Remove the WARNING NOTICE(S).
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(3) If you used the SAFETY BARRIER(S), remove them.

[Rev.10 from 2021] 2026.04.01 01:26:19 UTC