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A B767's right gen tripped and would not reset at FL370. The crew descended to FL270 where the APU started. The flight continued to its destination.
| Attributes | |
| ACN | 804601 |
| Time | |
| Date | 200809 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : zzz.vor |
| State Reference | US |
| Altitude | msl single value : 37000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 804601 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 804602 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : electrical panel other flight crewa other flight crewb |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
In cruise at FL370; the right engine driven generator dropped off line; and because of that both utility busses shed also. Immediately initiated the APU start; and then went to the QRH and went through the generator off procedure. The reset of the right generator resulted in the illumination of the right generator drive light on the overhead panel. The APU did not start. Because we had only 1 electrical power source; declared an emergency and we initiated a descent in preparation for a diversion and also because we thought that another APU start attempt at a lower altitude would be successful. The APU did start when we were below 30000 ft. At that point; we could see no reason not to continue on to ZZZ now that we had 2 good generators. We canceled our emergency with ATC and resumed our normal altitude and route to ZZZ also spoke with dispatch and they agreed with our decision to press on. Supplemental information from acn 804602: requested lower to attempt APU start at lower altitude and began looking for VFR alternate. APU started at FL270.
Original NASA ASRS Text
Title: A B767'S R GEN TRIPPED AND WOULD NOT RESET AT FL370. THE CREW DSNDED TO FL270 WHERE THE APU STARTED. THE FLT CONTINUED TO ITS DEST.
Narrative: IN CRUISE AT FL370; THE R ENG DRIVEN GENERATOR DROPPED OFF LINE; AND BECAUSE OF THAT BOTH UTILITY BUSSES SHED ALSO. IMMEDIATELY INITIATED THE APU START; AND THEN WENT TO THE QRH AND WENT THROUGH THE GENERATOR OFF PROC. THE RESET OF THE R GENERATOR RESULTED IN THE ILLUMINATION OF THE R GENERATOR DRIVE LIGHT ON THE OVERHEAD PANEL. THE APU DID NOT START. BECAUSE WE HAD ONLY 1 ELECTRICAL PWR SOURCE; DECLARED AN EMER AND WE INITIATED A DSCNT IN PREPARATION FOR A DIVERSION AND ALSO BECAUSE WE THOUGHT THAT ANOTHER APU START ATTEMPT AT A LOWER ALT WOULD BE SUCCESSFUL. THE APU DID START WHEN WE WERE BELOW 30000 FT. AT THAT POINT; WE COULD SEE NO REASON NOT TO CONTINUE ON TO ZZZ NOW THAT WE HAD 2 GOOD GENERATORS. WE CANCELED OUR EMER WITH ATC AND RESUMED OUR NORMAL ALT AND RTE TO ZZZ ALSO SPOKE WITH DISPATCH AND THEY AGREED WITH OUR DECISION TO PRESS ON. SUPPLEMENTAL INFO FROM ACN 804602: REQUESTED LOWER TO ATTEMPT APU START AT LOWER ALT AND BEGAN LOOKING FOR VFR ALTERNATE. APU STARTED AT FL270.
Data retrieved from NASA's ASRS site as of May 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.