# SDR UIEA2017052200825

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2017
- Submitted: May 23, 2017
- Operation: Air carrier
- Aircraft: [N661GT](https://openairdocs.org/aircraft/N661GT), registered now
- Make and model: Boeing 767-36N
- Registry model: [Boeing 767-36N](https://openairdocs.org/model/boeing-767-36n) (OpenAirDocs)
- Aircraft serial: 30110
- Aircraft time: 74,243 hours, 9,355 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Valve
- Part number: 97980612
- Part serial: 758CNBSP
- 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/UIEA2017052200825

## Discrepancy

APU FAULT AND AUTO SHUTDOWN,  APU FAULT ON ECU GEN FILTER.  FOLLOWED FIM TASK 49-11, FAULT TREE 969.  FOUND SCAVENGE FILTER ELEMENT BAD. R & R IAW AMM 49-29-03-004 001. OPS CHECKED GOOD.  INSPECTED MAGNETIC CHIP DETECTOR, NO METAL FOUND IAW 49-27-04-206-0014. R & R THE LOW OIL PRESSURE S/W AND ECU.  NO HELP.  ORIGINAL ECU REINSTALLED.  REMOVED AND REPLACED APU SURGE VALVE, OPS CHECKED IAW 49-53-01, OPS CHECKED GOOD.

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