Connection of the Isolation Coupling of the Power Transfer Unit (PTU)

TASK 29-23-00-860-002-A
Connection of the Isolation Coupling of the Power Transfer Unit (PTU)

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

REFERENCE	QTY	DESIGNATION
No specific	AR	PLUG - BLANKING, PLASTIC

B. 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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
Isolation Coupling

3. Job Set-up
Subtask 29-23-00-860-052-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) Make sure that the Green and Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Refer to the ECAM indication of the Green and Yellow system pressures and make sure that they show 0 psi).
(4) Make sure that the main doors of the main gear are open (Ref. AMM TASK 32-12-00-010-001).
(5) Make sure that the ends of the isolation couplings are clean.

4. Procedure
Subtask 29-23-00-420-050-A

A. Connection of the isolation coupling of the PTU.
(1) Remove the PLUG - BLANKING, PLASTIC.
(2) Connect the two parts of the isolation coupling and turn the coupling mechanism until the teeth are fully engaged.

Subtask 29-23-00-790-050-A

B. Leak Test
(1) Pressurize the Green and Yellow hydraulic systems (Ref. AMM TASK 29-23-00-863-001).
(2) Make sure that there is no hydraulic leak.

5. Close-up
Subtask 29-23-00-860-051-A

A. Put the aircraft back to the serviceable condition.
(1) Close the main doors of the main landing gear (Ref. AMM TASK 32-12-00-410-001).
(2) Depressurize the Green and Yellow hydraulic systems (Ref. AMM TASK 29-23-00-864-001).
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 04:45:34 UTC