# SDR UIEA2018030500322

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2018
- Submitted: March 15, 2018
- Operation: Air carrier
- Aircraft: [N1321A](https://openairdocs.org/aircraft/N1321A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27957
- Aircraft time: 81,870 hours, 18,955 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Control Valve
- Part number: 97980612
- Part serial: 2517C
- Condition: Failed
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018030500322

## Discrepancy

APU FAILED AND FAILED TO RESTART.   ACCOMPLISHED AN APU BITE IAW FIM 49-11 FT 958.   FOUND REVERSE FLOW FAULT,  ACCOMPLISHED FIM 49-11 FAULT TREE 965,  REMOVED AND REPLACED THE APU SURGE CONTROL VALVE IAW AMM 49-53-01.  OPS CHECKED GOOD.

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