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A B737-800 dispatched with a single generator and pack cruised at FL250 when the APU shutdown. The APU was restarted but shutdown a second time with a low oil pressure warning. The flight returned to the departure airport with a single generator.
| Attributes | |
| ACN | 1278684 |
| Time | |
| Date | 201507 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | APU |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
The aircraft on this flight had two mels; the first was the right pack and the second was the left generator. The single pack limited our altitude to a maximum of 25;000 feet; and the single generator required us to run the APU for the entire flight. I decided to take the airplane because the weather was good along the entire route. We were also carrying 16;000 lbs of ferry fuel. The flight proceeded normally until we were airborne about an hour when we noticed a master caution light illuminated because of an electric problem. We noticed the APU had shut down giving us the source off light. The APU was restarted; but the APU low pressure light remained illuminated and the APU shut down again. We realized we were down to a single generator and discussed airports to divert to. After talking to dispatch; we decided to come back to the departure airport. I [advised] ATC and told them we were down to a single generator and would be landing overweight. The arrival and landing were uneventful. The first officer landed the airplane and I taxied to the gate with no further problems.
Original NASA ASRS Text
Title: A B737-800 dispatched with a single generator and pack cruised at FL250 when the APU shutdown. The APU was restarted but shutdown a second time with a low oil pressure warning. The flight returned to the departure airport with a single generator.
Narrative: The aircraft on this flight had two MELs; the first was the right pack and the second was the left generator. The single pack limited our altitude to a maximum of 25;000 feet; and the single generator required us to run the APU for the entire flight. I decided to take the airplane because the weather was good along the entire route. We were also carrying 16;000 lbs of ferry fuel. The flight proceeded normally until we were airborne about an hour when we noticed a Master Caution light illuminated because of an electric problem. We noticed the APU had shut down giving us the Source Off light. The APU was restarted; but the APU Low Pressure light remained illuminated and the APU shut down again. We realized we were down to a single generator and discussed airports to divert to. After talking to dispatch; we decided to come back to the departure airport. I [advised] ATC and told them we were down to a single generator and would be landing overweight. The arrival and landing were uneventful. The First Officer landed the airplane and I taxied to the gate with no further problems.
Data retrieved from NASA's ASRS site 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.