Installation of the Drain Tank (APS 3200)

TASK 49-17-41-400-002-A
Installation of the Drain Tank (APS 3200)

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

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 3M (10 FT)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 49-00-00-860-005-A	APU Start by External Power
TASK 49-00-00-860-005-A-01	APU Start by Batteries
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
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
Drain Tank

3. Job Set-up
Subtask 49-17-41-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 3M (10 FT) is in position below the access doors 315AL and 316AR.
(2) Make sure that the access doors 315AL and 316AR are open (Ref. AMM TASK 52-41-00-010-001).

Subtask 49-17-41-865-054-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 49-17-41-910-050-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Make an inspection of the drain tank (9) for damage, dents, chafings and cracks. Install a new drain tank if necessary.
(2) Remove the blanking plugs from the line ends.
(3) Clean the mating surfaces and apply Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) .

Subtask 49-17-41-420-051-A ** ON A/C NOT FOR ALL

B. Installation of the Drain Tank
(1) Put the drain tank (9) between the brackets (7) on the air intake diffuser (8).
(2) Protective Treatment
(a) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the screws (6), the washers (5) and the nuts (10).
(3) Install the screws (6), the washers (5) and the nuts (10). Do not fully tighten the screws at this time.
(4) Install the spring adapters (1) with the washers (2) and the nuts (3).
(5) Close the APU access door 316AR.
(6) Adjust the drain tank/spring adapter assembly as follows:
(a) Move the center of the spring adapters (1) into the center of the APU drain lines.
(b) Adjust the preload of the spring adapters (1) until the dimension C is 48.0 mm (1.8898 in.).
(7) Fully tighten the screws (6) and the nuts (10).
(8) Connect and tighten the nuts (4) to the drain lines.

Subtask 49-17-41-865-055-A ** ON A/C NOT FOR ALL

C. 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 49-17-41-790-050-A ** ON A/C NOT FOR ALL

D. Test
(1) Start and operate the APU (Ref. AMM TASK 49-00-00-860-005).
(2) Do the APU shutdown (Ref. AMM TASK 49-00-00-860-006).
(a) After the shutdown, examine the joints of the drain tank for leaks.

NOTE: Leaks are not permitted.

5. Close-up
Subtask 49-17-41-410-052-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) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 12:41:45 UTC