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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