Caution: With EMER PWR switch in ON, battery cannot be relied upon for more than 30 minutes. Use emergency power only as required.
Use emergency power as long as phase of flight is critical, then turn emergency power off.
IF Captain’s Flight Instruments Not Restored:
EMER PWR Switch ......................................................... OFF
- - - - - PHASE OF FLIGHT IS NOT CRITICAL - - - - -IF Captain’s Flight Instruments Are Normal:
EMERGENCY AC BUS SENSING CB (Overhead Panel)...................................RESET IF TRIPPED
OR
* * * *
IF Captain’s Flight Instrument Flags Are In View:
EMER AC BUS FEED CB (K-7) AND ALTERNATE EMER AC BUS FEED CB (L-8).............................................CHECK
Both CB’s Are Tripped Or ALTERNATE EMER AC BUS FEED CB Has
Tripped:
ALTERNATE EMER AC BUS FEED CB (L-8) (One Time Only) ....................................................... RESET
Caution: If circuit breaker will not reset or trips again, do not reset EMER AC BUS FEED circuit breaker and do not move
OR
EMER PWR switch to ON.
IF
ALTERNATE EMER AC BUS FEED CB Resets:
Do not reset EMER AC BUS FEED CB (if tripped).
OR * * * *
(Continued)
~
~
MD-80 Sec. 3 Page 25
Flight Manual Continental Rev. 12/01/00 #29
~~
IF ALTERNATE EMER AC BUS FEED CB Will Not Reset Or Trips Again:
EMER PWR Switch............................................................OFF
Continue flight with affected instruments inoperative. Refer to emergency AC bus portion of overhead circuit breaker panel to determine affected circuits.
* * * *
IF ALTERNATE EMER AC BUS FEED CB Has Not Tripped:
Continue flight with affected instruments inoperative. Refer to emergency AC bus portion of overhead circuit breaker panel to determine affected circuits.
At Captain’s discretion:
EMER PWR Switch.....................................................................ON
EMER AC BUS OFF Light Is Off:
Use emergency power only as required.
Caution: With EMER PWR switch in ON, battery cannot be relied upon for more than 30 minutes.
Note: Flight instruments may take up to 3 minutes to erect OR before flags disappear. Fly airplane with wings straight and level.
Note: Battery charger will not operate while EMER PWR switch is ON.
* * * *
IF EMER AC BUS OFF Light is On:
EMER PWR Switch............................................................OFF
Continue flight with affected instruments inoperative.
* * * *
Sec. 3 Page 26 MD-80
Rev. 12/01/00 #29 Continental Flight Manual
CIRCUIT BREAKER(S) OUT
WARNING: Resetting of any tripped fuel boost pump, fuel quantity indication system, or lavatory flush motor circuit breaker is prohibited.
Caution: Indiscriminate pulling or resetting of circuit breakers for systems or components may cause unanticipated results because of systems interrelationships.
Note: A circuit breaker found in the out position may be the result of:
.
Tripped condition due to electrical fault.
.
Inadvertent pulling by contact/catching with an object.
. Intentional pulling during mx/ops procedure and failure to reset. IF Prior to Block Out:
A circuit breaker that is found in the out position (not known whether it tripped or was pulled) may be reset one time, unless:
.
There is reason to believe that it tripped due to electrical fault.
.
The crew heard the CB pop or observed a change in the associated aircraft system/warning light which was previously normal but is now unpowered as a result of the CB being out.
.
There is a previous logbook entry about the same CB being tripped in the previous 3 days.
.
There is associated electrical smoke/smell, or evidence of overheating
of any aircraft system. If any of the above conditions exist, the crew should not reset the CB. Enter the findings in the logbook and call maintenance.
IF After Block Out but Prior to Takeoff: Any circuit breaker that is confirmed to have tripped, should not be reset by the crew. The crew can continue the flight with the CB left in the tripped mode provided the affected system is not required as per the MEL, and all appropriate MEL procedures are complied with. Also there must be no electrical smoke/smell, or evidence of overheating of any aircraft system. In all cases a logbook entry is required. IF After Takeoff but Prior to Block In: One reset of a tripped circuit breaker may be attempted after a cooling period of approximately two minutes if called for by an emergency /abnormal checklist, or unless, in the judgement of the Captain, resetting the CB is necessary for the safe completion of the flight. If the circuit breaker trips again, do not attempt another reset. In all cases a logbook entry is required.
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