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B757 departs with 1 generator failed. Aircraft is flown with APU supplying power as second generator APU fails; flight crew declares emergency; diverts for landing.
| Attributes | |
| ACN | 694015 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zzz.artcc |
| State Reference | US |
| Altitude | msl single value : 31000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 225 flight time total : 16000 flight time type : 7000 |
| ASRS Report | 694015 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency flight crew : landed as precaution flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Company Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Prior to takeoff we noticed that the left generator was not online and the field was open. We contacted maintenance and he advised us to shut down/restart the left engine to verify that the left generator would come online automatically. We accomplished this and found that the generator field tripped at about 50% N1 and the generator did not come online. Maintenance advised us to disconnect the left generator idg and continue with the left generator deferred inoperative. The APU was working normally. After takeoff; climbing out of approximately FL305; the APU faulted and shut down. We attempted to restart the APU and it came online for 20 seconds and then faulted and shut down again. We advised ZZZ center that we had an electrical problem; declared an emergency and requested a return to ZZZ. We received a clearance for a right turn direct ZZZ and proceeded to an uneventful landing.
Original NASA ASRS Text
Title: B757 DEPARTS WITH 1 GENERATOR FAILED. ACFT IS FLOWN WITH APU SUPPLYING PWR AS SECOND GENERATOR APU FAILS; FLT CREW DECLARES EMER; DIVERTS FOR LNDG.
Narrative: PRIOR TO TKOF WE NOTICED THAT THE L GENERATOR WAS NOT ONLINE AND THE FIELD WAS OPEN. WE CONTACTED MAINT AND HE ADVISED US TO SHUT DOWN/RESTART THE L ENG TO VERIFY THAT THE L GENERATOR WOULD COME ONLINE AUTOMATICALLY. WE ACCOMPLISHED THIS AND FOUND THAT THE GENERATOR FIELD TRIPPED AT ABOUT 50% N1 AND THE GENERATOR DID NOT COME ONLINE. MAINT ADVISED US TO DISCONNECT THE L GENERATOR IDG AND CONTINUE WITH THE L GENERATOR DEFERRED INOP. THE APU WAS WORKING NORMALLY. AFTER TKOF; CLBING OUT OF APPROX FL305; THE APU FAULTED AND SHUT DOWN. WE ATTEMPTED TO RESTART THE APU AND IT CAME ONLINE FOR 20 SECONDS AND THEN FAULTED AND SHUT DOWN AGAIN. WE ADVISED ZZZ CTR THAT WE HAD AN ELECTRICAL PROB; DECLARED AN EMER AND REQUESTED A RETURN TO ZZZ. WE RECEIVED A CLRNC FOR A R TURN DIRECT ZZZ AND PROCEEDED TO AN UNEVENTFUL LNDG.
Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.