# SDR ASMF200509013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2005
- Submitted: September 23, 2005
- Operation: Air carrier
- Aircraft: [N804AM](https://openairdocs.org/aircraft/N804AM), registered now
- Make and model: Boeing 757-2Q8
- Registry model: [Boeing 757-2Q8](https://openairdocs.org/model/boeing-757-2q8) (OpenAirDocs)
- Aircraft serial: 26271
- Aircraft time: 36,760 hours, 14,400 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Valve
- Part number: 97980611
- Part serial: 494
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASMF200509013

## Discrepancy

AIRCRAFT RETURNED TO PLATFORM AS A CONSEQUENCE OF DURING ENGINES START, APU SHUT DOWN, FAULT LIGHT TURNED ON AND EICAS MESSAGE APU FAULT WAS DISPLAYED.  THE FIM 49-11-00 PROCEDURES WAS PERFORMED.  THE ENGINES START WAS PERFORMED WITH GROUND EQUIPMENT, ALL CORRECT.  DURING OVERNIGHT CHECK SURGE VALVE AND GEARBOX VALVE WERE REPLACED IAW MM 49-53-01 AND MM 49-27-11, RESPECTIVELY.  TESTS WERE PERFORMED AND BOTH ENGINE WERE MOTORIZED AT 30 PERCENT OF N2 IAW MM 49-00-00, OPERATING CORRECTLY THE APU.

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