Continue checklist at .
IF  Temperature Increases And Stabilizes In Danger (Red) Zone Or Frequency Is Out Of Limits:
GEN Switch (Affected System) ............................................. OFF

.  Caution: Next switch action is irrevocable.  Make certain switch selected is for malfunctioning CSD.
Note:  CSD disconnect can be confirmed by observing AC volts and frequency below scale. CSD disconnect may cause temporary loss of associated AHRS unit. Realignment in flight will require 45 seconds.

(Continued)
MD-80 Sec. 3 Page 29
Flight Manual Continental Rev. 01/01/97  #25

CSD Disconnect Switch (Affected System)
(Hold for three seconds).......................................................DISC

Utilize APU generator if available. IF APU Generator is Available:
APU BUS Switch (Affected Side).....................................ON

Note:  If Remaining engine generator should fail, APU generator will crosstie. If this occurs, move remaining APU switch to ON.
IF Only One Generator (Engine or APU) is Operating:
- - - - - PRIOR TO LANDING - - - - -
One AIR CONDITIONING SUPPLY Switch......... OFF
GALLEY Switch ..................................................... OFF

* * * *
Sec. 3 Page 30 MD-80
Rev. 01/01/97 #25 Continental Flight Manual

CSD OIL PRESS LOW LIGHT ON

GEN OFF Light Is On:
GEN Switch (Affected System) ............................................. OFF

Utilize APU generator if available. Continue checklist at ..
IF  APU Generator Is Not Available: 
Continue operation of engine generator at Captain’s discretion. 
IF  * * * * APU Generator Is Available: 
APU BUS Switch (Engine With CSD OIL PRESS LOW Light On)............ ON 
GEN Switch (Affected System) ...................................... OFF 

GEN OFF Light Is Out:
APU Generator Availability ................................. DETERMINE

.  Caution: Next switch action is irrevocable. Make certain switch selected is for malfunctioning CSD.
Note:  CSD disconnect can be confirmed by observing AC volts and frequency below scale. CSD disconnect may cause temporary loss of associated AHRS unit. Realignment in flight will require 45 seconds.
CSD Disconnect Switch (Affected System)
(Hold for three seconds) ................................................DISC

Note:  If remaining engine generator should fail, APU generator will crosstie. If this occurs, move remaining APU switch to ON.
IF Only One Generator (Engine or APU) is Operating:
- - - - - PRIOR TO LANDING - - - - -
One AIR CONDITIONING SUPPLY Switch......... OFF
GALLEY Switch ..................................................... OFF

* * * *
MD-80 Sec. 3 Page 31
Flight Manual Continental Rev. 08/01/98  #27

DC BUS OFF LIGHT ON

IF DC Load Meters Indications are Normal:

DC BUS OFF SENSING Circuit Breaker (R-23).................................RESET IF TRIPPED
OR
If DC BUS OFF Light remains on, sensing circuit is faulty.

* * * *
IF DC Load Meters Indications are Abnormal:
Affected T/R Circuit Breakers .........................................CHECK

Left T/R #1: K-1, 2, 3 Left T/R #2: K-4, 5, 6 Right T/R #1: L-1, 2, 3 Right T/R #2: Ground Service Bus upper left corner IF Tripped:

T/R #1 OR T/R #2 Circuit Breakers........................... RESET

If circuit breakers will not reset, try resetting circuit breakers for other T/R. If second T/R circuit breakers will not reset, continue with affected equipment inoperative.
OR
Caution:  Do not attempt to move DC BUS X-TIE switch to CLOSE if T/R circuit breakers cannot be reset.

* * * *
IF Not tripped:
DC BUS X-TIE Switch (If desired).............................CLOSE

Monitor DC load meters of operative T/Rs.
* * * *
Sec. 3 Page 32 MD-80
Rev. 05/15/95 #23 Continental Flight Manual

DC EMER BUS OFF LIGHT ON

Note:  Continue with affected equipment inoperative until time is
available to complete this procedure.

IF CAPT PITOT HEATER CURRENT Is Normal:

Emergency DC Bus Sensing Circuit Breaker (Overhead Panel B-11 or 12) .......................RESET IF TRIPPED
Note:  DC EMER BUS OFF light may be illuminated by a malfunctioning sensing circuit or by a tripped circuit
OR
breaker. Resetting this circuit breaker may restore normal
operation.
* * * *

IF CAPT PITOT HEATER CURRENT Is Not Normal:
EMERGENCY DC BUS FEED Circuit Breaker (N-37)......................................................CHECK

IF Tripped:
Reset circuit breaker one time only.
Caution: If circuit breaker will not reset, or trips again, do OR not move EMER PWR switch to ON; a bus fault may exist.
　
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