# SDR DL76G091024

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 11, 2009
- Submitted: June 26, 2009
- Operation: Air carrier
- Aircraft: N154DL
- Make and model: Boeing 767-3P6
- Registry model: [Boeing 767-3P6](https://openairdocs.org/model/boeing-767-3p6) (OpenAirDocs)
- Aircraft serial: 25241
- Aircraft time: 77,558 hours, 16,038 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Turbine
- Part number: 380029817
- Part serial: P2760
- Condition: Failed
- Location: Apu
- Part time: 13,515 hours, 16,437 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL76G091024

## Discrepancy

APU GENERATOR FAILED.FIELD OFF LIGHT ILLUMINATED.  LONG HISTORY BIT BPCU FAULTS UNDERVOLTAGE TRIP REPLACE GCU-67. REPLACED GCU NO HELP.REPLACED BPCU AND ECU.ALL NO HELP.REINSTALLED ORIGINAL UNITS. SAME FAULT ALL THE TIME.  R & R APU PER AMM.  REQUIRES LEAK CHECK. INSTALLED NEW MOUNT NUTS.OPS AND LEAK CHECK GOOD.  OK FOR SERVICE.  ETOPS CATEGORY 'F': ANY OTHER EVENT DETRIMENTAL TO ETOPS

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.