# SDR UIEA2020062981430

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 2020
- Submitted: June 29, 2020
- Operation: Air carrier
- Aircraft: [N640GT](https://openairdocs.org/aircraft/N640GT), registered now
- Make and model: Boeing 767-3S1
- Registry model: [Boeing 767-3S1](https://openairdocs.org/model/boeing-767-3s1) (OpenAirDocs)
- Aircraft serial: 25221
- Aircraft time: 91,317 hours, 19,446 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Gcu
- Part number: 734284F
- Part serial: 4347
- Condition: Failed
- Location: Apu Generator
- 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/UIEA2020062981430

## Discrepancy

APU UNRELIABLE FOR ENGINE START.   REMOVED AND REPLACED APU GEN / CONTROL UNIT IAW AMM 24-22-02, OPS CHECK OK. NO FAULTS NOTED. STARTED ENGS / SEVERAL TIMES. APU GEN STAYED ON LINE, NO FAULTS NOTED. GOOD START. AMM 71-00-00.

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