APU GEN OFF LIGHT ON

Note: It is normal for this light to be on when the APU generator is available but not in use. This checklist should be accomplished if the APU GEN OFF light illuminates while attempting to use APU generator power.
APU BUS Switches................................................................................ OFF
APU GEN Switch.............................................................................RESET

Note: A generator must be reset only once for a given fault.  If fault trips generator after reset, fault should be located and corrected before attempting to place generator on its bus again.
APU Volts & Frequency are Not Within Allowable Limits: Generator capability is lost.
* * * *
APU Volts & Frequency Are Within Allowable Limits: Note: If APU generator is the only power source, move GALLEY switch to OFF before energizing generator buses.
APU BUS Switches..........................................ON (ONE AT A TIME)

IF  APU Volts & Frequency Are Zero or APU GEN OFF Light is On: 
Generator capability is lost. 
OR  APU BUS Switches.................................................................. OFF 
* * * * 
IF  APU Volts & Frequency Are Normal and APU GEN OFF Light is Off: 
Continue normal operation. 
* * * * 

Sec. 3 Page 16 MD-80
Rev. 01/01/97 #25 Continental Flight Manual

APU OIL PRESS LOW AND / OR APU
OIL TEMP HIGH LIGHT(S) ON

APU FIRE CONT Switch ...................................... OFF & AGENT ARM
APU AIR Switch ................................................................................. OFF
APU DOORS Switch........................................................................AUTO
APU MASTER Switch........................................................................OFF
APU FIRE CONT Switch ......................................................... NORMAL

* * * *
APU WILL NOT SHUT DOWN

Caution:  Except in an emergency, do not shut down APU by moving APU FIRE CONTROL switch to OFF & AGENT ARM, BATT switch to OFF, or pulling APU CONTROL circuit breaker, without first allowing a 60 second cool-down with bleed air off.
FIRE CONT Switch............................................... OFF & AGENT ARM

- - - - - AFTER APU SHUTS DOWN- - - - -
FIRE CONT Switch.................................................................. NORMAL

Caution:  The APU Fire Control switch must be moved to NORM to disarm the cockpit and external APU panel fire agent discharge circuits.
* * * *
MD-80 Sec. 3 Page 17
Flight Manual Continental Rev. 01/01/97 #25

APU WINDMILL START

Note:  Successful windmill starts are not likely above 24,000 feet. Aircraft
speed envelope for windmill start is 230-340 KIAS (.70 mach).
Higher speeds will give a higher probability of successful start.
Windmill start is improbable with cold soak exceeding . hour.
The following procedure assumes a failure of both engine driven generators.
Battery Switch ...................................................................................... ON
APU FIRE CONT Switch ...............................................................NORM
APU AIR Switch ................................................................................ OFF
APU MASTER Switch........................................................................OFF
AC CROSSTIE Switch .................................................................... OPEN
APU DOORS Switch........................................................................AUTO
START PUMP Switch .......................................................................... ON
APU MASTER Switch................................START, RELEASE TO RUN
APU OIL PRESS LOW Light .......OFF (AT OR PRIOR TO 95% RPM)

- - - - - AFTER START- - - - -
Note:  Multiple start attempts are acceptable, if required. BATT switch must be left in ON to sustain APU operation.
APU BUS Switches............................................... ON (ONE AT A TIME)
AC CROSSTIE Switch ....................................................................AUTO
Fuel Boost Pumps.................................................................. VERIFY ON
START PUMP Switch ........................................................................ OFF

* * * *
Sec. 3 Page 18 MD-80
Rev. 05/15/95 #23 Continental Flight Manual

INTENTIONALLY LEFT BLANK

MD-80 Flight Manual  Continental  Sec. 3 Page 19 Rev. 05/15/95 #23 
AUTOPILOT 
AP TRIM LIGHT STAYS ON 

Autopilot.................................................................................DISENGAGE
　
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