# SDR FDEA202605020532

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2026
- Submitted: May 4, 2026
- Operation: Air carrier
- Aircraft: [N156FE](https://openairdocs.org/aircraft/N156FE), registered now
- Make and model: Boeing 767-3S2F
- Registry model: [Boeing 767-3S2F](https://openairdocs.org/model/boeing-767-3s2f) (OpenAirDocs)
- Aircraft serial: 63096
- Aircraft time: 13,048 hours, 6,230 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Condition: Faulted
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202605020532

## Discrepancy

WHEN I TRIED TO SWITCH FROM EXTERNAL POWER TO APU  POWER, THE APU WOULDN T HOLD THE LOAD. EVERYTHING  IN THE COCKPIT FLICKERED WITH AUDIBLE CLICKING AND  GRINDING SOUNDS AND THERE WAS A STRONG ELECTRICAL  BURNING ODOR.  SWITCHED BACK TO EXTERNAL POWER AND  THE APU STILL RUNS WITH AIR BUT AFTER MAINTENANCE  HAD US TRY AGAIN, THE APU STILL WILL NOT HOLD THE LOAD.   AMM 24-50-00-5 P-34 PANEL REMOVAL, REPAIR AND REINSTALLATION AS WELL AS FEEDER WIRING REPAIRS ARE DOCUMENTED ON INDIVIDUAL WRI'S TSI 24-00/6632 ADDRESSED INDIVIDUAL MAINTENANCE OPS CHECK TASKS. ELECTRICAL LOAD DISTRIBUTION ADJ/TESTS WERE PERFORMED AND CHECK NORMAL, REF AMM 24-50-00-5.  ALL TASKS COMPLETED & ACFT OK FOR SERVICE.

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