Removal of the Oil Transfer Tubes (APS 3200)

TASK 49-21-00-000-001-A
Removal of the Oil Transfer Tubes (APS 3200)

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

WARNING: LOCK THE MECHANISM OF THE ACCESS DOOR 316AR WITH THE PIP PIN WHEN YOU OPEN THE ACCESS DOOR. THIS WILL PREVENT 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	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	TOOL PICK
No specific	1	WARNING NOTICE(S)
98L12003001000	AR	HARNESS,SAFETY
AID00435	1	SEAL EXTRACTOR

B. Consumable Materials

REFERENCE	DESIGNATION
No specific	Dry-Cloth

C. 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

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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-00-00-790-002-A	Leak Test of the APU
TASK 52-41-00-010-001-A	Open the APU Doors for Access
Oil Transfer Tube 6 o'clock (APS 3200)
Oil Transfer Tube 11 o'clock (APS 3200)
Oil Transfer Tube 1 o'clock (APS 3200)

3. Job Set-up
Subtask 49-21-00-860-054-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On overhead panel 25VU, make sure that the APU MASTER SW pushbutton switch is released (ON legend is off).
(3) On the APU section of overhead panel 25VU, put a WARNING NOTICE(S) 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).

Subtask 49-21-00-865-050-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 49-21-00-010-055-A ** ON A/C NOT FOR ALL

C. Get Access

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.

(1) Put on and attach the HARNESS, SAFETY before you start work in the work area.
(2) Put an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position below APU access doors 315AL and 316AR.
(3) Open APU access doors 315AL and 316AR
(Ref. AMM TASK 52-41-00-010-001).
(4) Set the light switch 11LJ to the ON position.

4. Procedure
Subtask 49-21-00-210-050-A ** ON A/C NOT FOR ALL

A. Do a visual inspection of the APU for oil/fuel leaks (Ref. AMM TASK 49-00-00-790-002).

Subtask 49-21-00-020-055-A ** ON A/C NOT FOR ALL

B. Removal of the Oil Transfer Tubes

NOTE: This removal procedure is applicable to the oil scavenge transfer-tube (6 o'clock position), oil supply transfer-tube (11 o'clock position) and oil vent transfer-tube (1 o'clock position).

(1) Loosen the B-nut (3) on the oil line (4) to the oil transfer tube (2) and disconnect the oil line (4).
(a) When you loosen the B-nut (3) on the oil line (4) that attaches to the oil transfer tube (2) it is important to use two wrenches to prevent the movement of the oil transfer tube (2) to rear bearing housing.
(2) Loosen and remove the oil transfer tube (2).
(3) Use the TOOL PICK or the AID00435 SEAL EXTRACTOR to remove the seal (1).
(a) If it does not come out with the removal of the oil transfer tube (2), discard the copper seal (1).
(b) Engage the spiral flute into copper-seal inner diameter, then turn and push a sufficient small distance to connect the seal.

CAUTION: BE CAREFUL NOT TO CAUSE DAMAGE TO THE REAR-BEARING BOX SEAL-FACE.

(4) Clean the boss that has a thread and surfaces near it into the rear-bearing housing.
(a) Do not use any cleaning agent. Use the Dry-Cloth to clean the rear-bearing box seal-face.

Subtask 49-21-00-210-051-A ** ON A/C NOT FOR ALL

C. Visual inspection
(1) Do a visual inspection of the transfer tube and connection tube for any sign of damage.
(2) If transfer tube thread is damaged, must be replaced.

[Rev.10 from 2021] 2026.04.01 12:41:42 UTC