# SDR UIEA2018031900436

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2018
- Submitted: March 19, 2018
- Operation: Air carrier
- Aircraft: [N1321A](https://openairdocs.org/aircraft/N1321A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27957
- Aircraft time: 81,938 hours, 18,982 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Valve
- Part number: 97980612
- Part serial: 343C
- Condition: Failed
- Location: Apu
- 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/UIEA2018031900436

## Discrepancy

APU INOPERATIVE.  ACCOMPLISHED AN APU BITE IAW FIM 49-11/ 958,  FOUND REVERSE FLOW FAULT. ACCOMPLISHED 49-11 FAULT TREE 965. REMOVED AND REPLACED APU SURGE VALVE IAW AMM 49-53-01, OPS CHECKED NORMAL.

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