(8)
Make sure that the APU fire and overheat detection system and the APU fire extinguishing system are operational (Ref. TASK 26-22-00-710-001).
(9)
Remove the APU air intake and exhaust blanking plugs.
(10) If not required during operation of the APU, remove the ground support equipment, the special and standard tools and all other items.
Subtask 49-00-00-865-088
C. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU APU/FUEL/BLOW OFF/PUMP 2QC B14 121VU APU/FUEL/BLOW OFF/CTL 1QC K39 121VU APU/FIRE AND OVHT/DET/LOOP B 2WG L44 121VU APU/FIRE AND OVHT/DET/LOOP A 1WG L43 121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41 121VU APU/FIRE/EXTIG/SQUIB/B 2WF L39 121VU APU/FIRE/EXTIG/SQUIB/A 1WF L38 121VU APU/FIRE/LP VALVE/NORM 4WF M42 121VU APU/FIRE/LP VALVE/STBY 3WF M41 121VU APU/FUEL/LP VALVE/CTL 1QF M40 121VU APU/FUEL/LP VALVE/SPLY 2QF M39 121VU APU/FUEL/PUMP/CTL 3QC M38
4. Procedure
_________
Subtask 49-00-00-860-060
A. Start and operate the APU
CAUTION : OBEY THE SAFETY PRECAUTIONS.
_______
CAUTION : DO NOT OPERATE THE APU WHEN THE MAIN BATTERIES ARE OFF. IF YOU
_______ OPERATE THE APU IN THESE CONDITIONS, YOU CAN CAUSE THESE RESULTS:
-IF THERE IS AN APU FIRE, THE APU FIRE-BOTTLES WILL NOT OPERATE
-
THERE WILL BE NO DE-OILING OF THE APU DURING SHUT-DOWN. THIS WILL CAUSE SMOKE IN THE CABIN
-
THERE WILL BE NO COOL-DOWN SEQUENCE OF THE APU
-THE IGV WILL NOT CLOSE FULLY. THIS CAN CAUSE PROBLEMS WHEN YOU START THE APU AGAIN.
NOTE : If the APU is to be started on BAT, and the OAT is 0 deg. C or
____ less, to avoid APU AUTO S/D due to air in the APU fuel delivery line, it is recommended that immediately after the APU has started and the "AVAIL" light is on, select APU GEN to provide A/C electrical power and start L1 or L2 main fuel boost pump.
NOTE : If the APU is to be started on EXT POWER, make sure that the
____ batteries are switched ON. If not, the APU may not start and shut down.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the APU section on the panel On the APU section on the panel 25VU: 25VU: - the ON legend in the APU MASTER SW
-push the APU MASTER SW p/bsw p/bsw 14KD comes on.
14KD.
2.
Get access to the APU menu page On the MCDU: in the SYSTEM REPORT/TEST - the APU menu page comes on. (Ref. TASK 31-32-00-860-001).
3.
On the MCDU: On the MCDU:
-push the line key adjacent to - the APU DATA/OIL page comes on, with the APU DATA/OIL indication. the indication
-OIL LEVEL : OK
-------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
4. On the MCDU: On the MCDU:
- push the line key adjacent to the RETURN indication. - the APU menu page comes on.
5. On the MCDU: On the MCDU:
- push the line key adjacent to the SYSTEM SELF-TEST - the APU SYSTEM SELF-TEST page comeson with the indication
indication. TEST IN PROGRESS and then
TEST OK
6. On the MCDU: On the MCDU:
- push the line key adjacent to the RETURN indication until the - the CFDS MENU page comes on.
CFDS menu comes into view.
7. On the APU section on the panel 25VU: - push the APU START p/bsw 14KD. On the APU section on the panel 25VU:- the ON legend in the APU START p/bsw14KD comes on .
NOTE : The ECB (59KD) controls and____ monitors the APU start.
On the APU page on the lower ECAM DU: - all indications show, that the APU operates in the specified limits during the start sequence (no red and/or amber indications).
At the end of the APU start sequence:
On the panel 25VU: - the ON legend in the APU START p/bsw 2KA goes off. - the AVAIL legend in the APU START p/bsw 2KA comes on.
On the APU page on the lower ECAM DU: - the AVAIL message comes on. - all indications show that the APU
operates in the specified limits (no red and/or amber indications).
On the ENGINE/WARNING page on the upper ECAM DU:
-------------------------------------------------------------------------------ACTION RESULT ------------------------------------------------------------------------------- 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(93)
