On the lower ECAM display:
-
the N indication stays at 100%.
-
the EGT indication changes to the pneumatic load condition.
-all indications show that the APU operates in the specified limits (no amber or red indications).
On the panel 35VU:
-the APU GEN pushbutton switch OFFlegend comes on.
On the lower ECAM display:
-APU GEN (amber) OFF (white) indication comes on.
On the panel 30VU:
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
- push the PACK1 and PACK2 pushbutton switches to the OFF position. - the OFF legends in the PACK1 andPACK2 pushbutton switches come on.
On the lower ECAM display: - the N indication stays at 100%. - the EGT indication cahnges to the no pneumatic load condition.
14. On the panel 25VU: - release the APU MASTER SW pushbutton switch. On the panel 25VU:- the ON legend in the APU MASTER SWpushbutton switch goes off. - the AVAIL legend in the APU START pushbutton switch stays on during the APU cooldown delay of 2 minutes, it goes off after the APU cooldown delay is completed.
On the lower ECAM display: - APU BLEED valve symbol changes to the closed position.
On the lower ECAM display: - the AVAIL indication goes off, when the AVAIL legend in the APU START pushbutton switch goes off. - the EGT and N indicatons go off, when the ECB is powered down.
15. On the MCDU 1(2) AVIONICS STATUS page: - there is no APU related
indication.
NOTE : You must wait 2 minutes after the AVAIL legend goes off before you
____ select BAT 1and BAT 2 to the OFF position. This gives sufficient time for the air intake to fully close.
5. Close-up
________ Subtask 49-00-00-860-076
A. Aircraft Maintenance Configuration
(1)
On the MCDU 1(2):
-push the line key adjacent to the RETURN indication until the MCDU MENU page comes on,
-set the BRT knob to off.
(2)
De-energize the aircraft electrical circuits. (Ref. TASK 24-41-00-862-002)
(3)
Make sure that the work area is clean and clear of tool(s) and other items.
(4)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
TASK 49-00-00-790-002
Leak Test of the APU (APS 3200)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 49-00-00-710-008 Operational Test of the APU (APS 3200) 49-16-00-100-002 Cleaning of the APU Air Intake System (APS 3200) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 52-41-23-000-001 Removal of the Maintenance Door 314AR 52-41-23-400-001 Installation of the Maintenance Door 314AR
3. Job Set-up
__________ Subtask 49-00-00-860-071
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(2)
On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(3)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
4. Procedure
_________ Subtask 49-00-00-790-051
A. Test the APU for Oil/Fuel Leaks
(1)
Start and operate the APU in the ECS mode (Ref. TASK 49-00-00-710-008).
(2)
During APU operation:
-
check for oil smell in the passenger compartment.
-
check for smoke from the APU exhaust.
NOTE : Oil smell in the passenger compartment is an indication of
____ internal oil leakage or ingestion of external oil leakage. Smoke from the APU exhaust is an indication of internal oil leakage. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM 机载辅助动力 AIRBORNE AUXILIARY POWER1(144)
