Check the APU Fuel-Pump System for Leakage from the Shroud Drain Mast and the APU Compartment Drain-Mast with the APU Fuel Pump running

TASK 28-22-00-210-001-A
Check the APU Fuel-Pump System for Leakage from the Shroud Drain Mast and the APU Compartment Drain-Mast with the APU Fuel Pump running

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. 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 31-60-00-860-001-A	EIS Start Procedure

3. Job Set-up
Subtask 28-22-00-860-058-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) On the FUEL overhead panel 40VU, make sure that all L TK PUMPS and the R TK PUMPS are released (the OFF legends are on).

Subtask 28-22-00-865-054-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	APU/FUEL/BLOW OFF/PUMP	2QC	B14
** ON A/C NOT FOR ALL
121VU	APU/FUEL/BLOW OFF/CTL	1QC	K39
** ON A/C ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
121VU	APU/FUEL/LP VALVE/CTL	1QF	M40
121VU	APU/FUEL/LP VALVE/SPLY	2QF	M39
121VU	APU/FUEL/PUMP/CTL	3QC	M38
** ON A/C NOT FOR ALL
121VU	APU/FUEL/BLOW OFF/CTL	1QC	P38

4. Procedure
Subtask 28-22-00-210-051-A

A. Check APU Fuel Pump System for Leakage from Shroud Drain Mast and APU Compartment Drain Mast with APU Fuel Pump running
(1) On the APU section of the overhead panel 25VU, push the APU MASTER SW to the ON position (the ON legend comes on).
(2) On the ECAM control panel, push the FUEL pushbutton switch.
The lower ECAM display unit comes on.
Make sure that the APU fuel-valve-position symbol shows the open position.
(3) Examine the drain mast at FR47 and the APU-compartment drain mast for fuel leakage.

NOTE: Leaks are not permitted.

(4) After 5 minutes, release the APU MASTER SW to the off position (the ON legend goes off).

5. Close-up
Subtask 28-22-00-860-059-A

A. Put the aircraft back to its initial configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Put the system back to the serviceable condition.

[Rev.10 from 2021] 2026.04.02 06:17:31 UTC