4. Procedure
_________
Subtask 49-00-00-860-131-A
A. Start and operate the APU
CAUTION : OBEY THE SAFETY PRECAUTIONS.
_______
NOTE : If the APU must be started on BAT and the OAT is 0 deg. C or less,
____
we recommend:
-
to select the APU GEN to provide A/C electrical power.
-
to start L1 or L2 main fuel boost pump. This you must do immediately after the APU started and the AVAIL light is ON. In this way you avoid APU AUTO S/D because air in the APU fuel delivery line.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the APU section on the panel On the APU section on the panel 25VU: 25VU:
-push the APU MASTER SW - the ON legend in the APU MASTER SW pushbutton switch. pushbutton switch comes ON.
NOTE : Wait 5 seconds for APU power-up
____ and watch states completion.
2. On the APU section on the panel On the APU section on the panel 25VU: 25VU:
-push the APU START pushbutton - the ON legend in the APU START
switch. pushbutton switch comes on .
NOTE : The ECB (59KD) controls and
____ monitors the APU start.
At the end of the APU start
sequence:
On the panel 25VU:
-
the ON legend in the APU START pushbutton switch goes off.
-
the AVAIL legend in the APU START pushbutton switch comes on.
NOTE : If necessary, the APU generator can energize the aircraft
____
electrical circuits (Ref. TASK 24-41-00-861-002).
NOTE : If necessary, the APU can supply bleed air for the
____
pre-conditioning (Ref. TASK 12-33-21-618-001).
TASK 49-00-00-860-006
APU Shutdown by External Power (APS 3200)
WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
CAUTION : DO NOT USE THE APU DURING FLUID DE-ICING OPERATIONS. DE-ICING FLUID
_______ CAN CONTAMINATE THE INSIDE OF THE APU.
CAUTION : DO NOT START THE APU WITH ACCESS DOORS 315AL AND 316AR OPEN/REMOVED.
_______ THE APU FIRE EXTINGUISHER SYSTEM IS NOT SUFFICIENT TO EXTINGUISH A FIRE IF THE ACCESS DOORS 315AL AND 316AR ARE OPEN/REMOVED.
CAUTION : OBEY THE SAFETY PRECAUTIONS.
_______
1. Reason for the Job
__________________
Shutdown of the APU which operates to do maintenance tasks.
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-33-21-618-001 Pre-conditioning through the HP Ground Connection 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 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure 49-00-00-860-005 APU Start by External Power (APS 3200) 49-00-00-910-002 Safety Precautions for the Operation of the APU (APS
3200) 3. Job Set-up
__________ Subtask 49-00-00-860-066
A. Aircraft Maintenance Configuration
(1)
The APU operates to do maintenance tasks (Ref. TASK 49-00-00-860-005).
(2)
Prepare to energize the aircraft electrical circuits from the external power (Ref. TASK 24-41-00-861-002).
(3)
If aircraft system(s) are supplied with bleed air from the APU, stop them.
NOTE : If necessary, prepare the pre-conditioning through the HP
____ ground connection (Ref. TASK 12-33-21-618-001).
(4) Make sure the lower ECAM DU is on (Ref. TASK 31-60-00-860-001) and shows the APU page.
4. Procedure
_________ Subtask 49-00-00-860-067
A. APU Shutdown
CAUTION : OBEY THE SAFETY PRECAUTIONS.
_______
NOTE : Obey the safety precautions for the operation of the APU
____
(Ref. TASK 49-00-00-910-002).
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. If the ON legend in the APU BLEED On the AIR COND section on the panel pushbutton switch is on (the APU 30VU: supplies bleed air), on the AIR - the ON legend in the APU BLEED COND section on the panel 30VU: pushbutton switch goes off (the APU
-push the APU BLEED pushbutton bleed air supply stops).
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