General Visual Inspection of APU Compartment Drain System (APS 3200)

TASK 49-17-00-200-805-A
General Visual Inspection of APU Compartment Drain System (APS 3200)

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

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 2M (6 FT)
No specific	1	PROBE - NON METALLIC, FLEXIBLE
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

D. Referenced Information

REFERENCE	DESIGNATION
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

3. Job Set-up
Subtask 49-17-00-860-056-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Put a WARNING NOTICE(S) in the cockpit to tell persons not to start the APU.

Subtask 49-17-00-010-057-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position below the APU compartment.
(2) Open APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control SW 11LJ to the ON position.

4. Procedure
Subtask 49-17-00-210-052-A ** ON A/C NOT FOR ALL

A. General Visual Inspection of APU Compartment Drain System
(1) Clean the area around the drain holes with a Textile-Lint free Cotton - (Material No.14SBA1) and Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .
(2) Examine the drain holes for blockage. If necessary, remove the blockage.
(3) If you find blockage into the drain mast, use a PROBE - NON METALLIC, FLEXIBLE to make sure that the drain pipe is not blocked.
(4) If the drain pipe is blocked, remove the blockage.
(5) Make sure that the drains are not blocked:
(a) Put water in the area of the drain hole and make sure that the water flows freely at the drain mast outlet.
(6) Make sure that the drain mast is correctly aligned.

5. Close-up
Subtask 49-17-00-410-057-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 control SW 11LJ to the OFF position.
(3) Close APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).

Subtask 49-17-00-860-057-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 01:28:25 UTC