# SDR AMTA200700215

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2007
- Submitted: May 8, 2007
- Operation: Air carrier
- Aircraft: [N522AT](https://openairdocs.org/aircraft/N522AT), registered now
- Make and model: Boeing 757-23N
- Registry model: [Boeing 757-23N](https://openairdocs.org/model/boeing-757-23n) (OpenAirDocs)
- Aircraft serial: 29330
- Engine: Rroyce RB211535E4
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter
- Condition: Dirty
- Location: Apu Oil Sys
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AMTA200700215

## Discrepancy

APU FAILED TO START, APU FAULT MESSAGE - ECU SHOWS LOP SHUTDOWN.  FOUND DELTA P ON OIL PRESS FILTER POPPED REPLACED FILTER.  RESET DELTA P, RAN APU NO FAULTS NOTED.  (K)

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