1. AUXILIARY POWER UNIT (CONT'D)
C. APU High Oil Temperature
Indication: APU OIL TEMP caution message and APU automatically shuts down.
APU is supplying bleed air for air-conditioning:
Yes
(1) Air-conditioning......................................... Transfer to engine bleeds.
(a) BLEED AIR, 10TH
STAGE R switch/light ........................Press in to open right valve.
Check the following:
• R 10TH CLOSED light out.
• APU LCV OPEN light out.
(b) BLEED AIR, 10TH
STAGE ISOL switch/light.................Press out to close isolation valve.
Check the following:
• 10TH ISOL OPEN light out.
• APU LCV OPEN light on.
(c) BLEED AIR, 10TH
STAGE L switch/light .........................Press in to open left valve and close
APU load control valve.
Check the following:
• L 10TH CLOSED light out.
• APU LCV OPEN light out.
(d) BLEED AIR, APU LCV
switch/light .......................................Press out to match APU load control
valve closed position.
No
(1) APU, PWR FUEL switch/light..........................Press out
(2) Do not restart APU.
END
ABNORMAL PROCEDURES
Auxiliary Power Unit
Vol. 1 05−07−3
REV 66, Feb 01/07
▼
CL−604 Operating Manual
PSP 604−6
1. AUXILIARY POWER UNIT (CONT'D)
D. APU Shut-Off Valve Failed to Close, After APU Shutdown Due to Fire
Indication: APU SOV caution message displayed after APU shutdown due to fire.
APU is supplying bleed air for air-conditioning:
Yes
(1) Air-conditioning......................................... Transfer to engine bleeds.
(a) BLEED AIR, 10TH
STAGE R switch/light ........................Press in to open right valve.
Check the following:
• R 10TH CLOSED light out.
• APU LCV OPEN light out.
(b) BLEED AIR, 10TH
STAGE ISOL switch/light.................Press out to close isolation valve.
Check the following:
• 10TH ISOL OPEN light out.
• APU LCV OPEN light on.
(c) BLEED AIR, 10TH
STAGE L switch/light .........................Press in to open left valve and close
APU load control valve.
Check the following:
• L 10TH CLOSED light out.
• APU LCV OPEN light out.
(d) BLEED AIR, APU LCV
switch/light .......................................Press out to match APU load control
valve closed position.
No
(1) APU, PWR FUEL switch/light..........................Press out
(2) Land at the nearest suitable airport.
END
E. APU Fuel Shut-Off Valve not in the Selected Position
Indication: APU SOV caution message on.
(1) No further action required. The APU is not available.
END
ABNORMAL PROCEDURES
Auxiliary Power Unit
Vol. 1 05−07−4
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
1. AUXILIARY POWER UNIT (CONT'D)
F. APU Negative-G Shut-Off Valve Failed to Close After APU Shutdown Due to Fire
Indication: APU NEG-G SOV caution message on.
(1) FUEL, L BOOST PUMP
switch/light .......................................................Press out to disarm affected boost
pump.
Check the following:
• L FUEL PUMP ON advisory
message out, and
• L FUEL PUMP INOP light
on.
(2) Left engine......................................................Shutdown Refer to POWER PLANT −
In-Flight Engine
Failure/Shutdown procedure in
this chapter.
END
G. APU Pump Failure
Indication: APU PUMP caution message on.
On ground:
Yes
(1) APU ........................................................Shutdown
− END −
No
In flight:
APU generator is essential (both main generators failed):
Yes
(1) APU indications ..........................................Monitor
(2) Land at the nearest suitable airport.
CAUTION
APU adapter oil will no longer be cooled. Adapter oil will
overheat causing APU to auto-shutdown.
− END −
No
(1) APU................................................................Shutdown
END
ABNORMAL PROCEDURES
Auxiliary Power Unit
Vol. 1 05−07−5
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
ABNORMAL PROCEDURES
Auxiliary Power Unit
Vol. 1 05−07−6
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
THIS PAGE INTENTIONALLY LEFT BLANK
1. DOORS
A. Passenger Door – Outer Handle not Stowed
Indication: PAX DOOR OUT HNDL caution message on.
(1) PASS SIGNS, SEAT BLTS switch .......................Select to ON.
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