* * * *
IF Not Tripped:
Continue operation with affected circuits inoperative. At
Captain’s discretion:
EMER PWR Switch...........................................................ON
Note: Operation with EMER PWR switch in ON will power emergency AC bus and emergency DC bus. With BATT switch in ON, DC transfer bus is powered regardless of EMER PWR switch position. Battery, if fully charged, will supply power for certain emergency equipment for approximately 30 minutes. Only equipment essential for safe flight should be used.
* * * *
MD-80 Sec. 3 Page 33
Flight Manual Continental Rev. 01/01/00 #28
DC TRANSFER BUS OFF LIGHT ON
IF Standby Attitude Indicator Power Off Flag Is Not In View:
DC Transfer Bus Sensing Circuit Breaker (X-37).................................RESET IF TRIPPED
Note: DC TRANSFER BUS OFF light may be illuminated by a
OR malfunctioning sensing circuit or by a tripped circuit breaker. Resetting this circuit breaker may restore normal operation.
* * * *
IF Standby Attitude Indicator Power Off Flag Is In View:
DC TRANSFER BUS FEED Circuit Breaker (N-36)......................................................CHECK
Tripped:
Reset circuit breaker one time only.
If circuit breaker will not reset, or trips again, continue
operation with affected equipment inoperative. Land at nearest
suitable airport.
* * * *
Not Tripped:
Land at nearest suitable airport.
- - - - -APPROXIMATELY 30 MINUTES PRIOR - - - - -TO GATE ARRIVAL
DC TRANSFER BUS FEED
Circuit Breaker (N-36).................................................. PULL CHARGER & TRANSFER RELAY CONTROL Circuit Breaker (N-38).................................................. PULL
Battery should restore power to DC transfer bus. Battery charger will be inoperative.
Note: Battery is time limited at 45 amperes for 30 minutes.
* * * *
Sec. 3 Page 34 MD-80
Rev. 05/15/95 #23 Continental Flight Manual
GEN OFF LIGHT ON
Note: This procedure addresses loss of generator due to action of fault protection.
Check CSD oil outlet temperature and for illumination of CSD OIL or CSD OIL PRESS LOW light for affected generator.
IF CSD OIL / CSD OIL PRESS LOW Light is On Or CSD Oil Outlet
Temperature Is High:
Proceed to either CSD OIL LIGHT ON, CSD OIL PRESS LOW
OR LIGHT ON, or CSD OIL OUTLET TEMP HIGH checklist this section, as appropriate. Do not continue this checklist.
* * * *
IF CSD OIL / CSD OIL PRESS LOW Light is Not On And CSD Oil Outlet
Temperature Is Normal:
GEN Switch (Affected System) .................................RESET, OFF
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.
AC Volts / Frequency (Affected System) ..........................CHECK
IF Within Allowable Limits:
GEN Switch (Affected System).....................................ON
AC Volts / Freq / Load (Affected System) ............CHECK
IF Within Allowable Limits:
Monitor system. Consider starting APU for use as backup.
OR
* * * *
IF Not Within Allowable Limits Or Will Not Stay On Line:
GEN Switch (Affected System)..............................OFF
Continue checklist at .
(Continued)
MD-80 Sec. 3 Page 35
Flight Manual Continental Rev. 05/15/95 #23
IF Not Within Allowable Limits:
. Note: All busses will be powered through AC crosstie
relay.
IF APU Generator Is Available:
APU L Or R Bus Switch (Side With Inoperative Generator).............................ON
Note: The AC loadmeter for operating engine generator should decrease and APU generator loadmeter should increase as AC crosstie relay automatically opened.
OR
Note: While airborne, if operating engine generator should fail, APU generator will crosstie. If this occurs, move remaining APU bus switch to ON. Verify one AIR CONDITIONING SUPPLY switch and GALLEY switch are in OFF before landing.
* * * *
IF APU Generator Is Not Available:
Monitor load of operating engine generator.
- - - - - PRIOR TO LANDING - - - - -
One AIR CONDITIONING SUPPLY Switch........... OFF
GALLEY Switch ....................................................... OFF
* * * *
Sec. 3 Page 36 MD-80
Rev. 12/01/00 #29 Continental Flight Manual
INTERMITTENT AC POWER INTERRUPTIONS
Note: This condition may be characterized by a loud buzzing / chattering sound from the EPC and any combination of random circuit breaker trips, inappropriate CAWS messages, loss of some flight instruments, flashing cockpit annunciators, and loss of left or right AC bus(es).
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