# SDR ASAA0853222

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2008
- Submitted: July 31, 2008
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 8,217 hours, 2,417 cycles
- Engine: Ge CFM567B24
- System (JASC): [4960 · APU Controls](https://openairdocs.org/jasc/4960)
- Part: Ecu
- Part number: 2118966222
- Part serial: 11F0465
- Condition: Failed
- Location: Apu
- Part time: 28,257 hours, 10,926 cycles
- Stage of operation: NR
- 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/ASAA0853222

## Discrepancy

EAPU FAULT LIGHT ILLUMINATED. TURNED OFF 3 TIMES DURING PREFLT WITH APU IN OFF POSITION PERFORMED FIM 49-60-00-810.  FOUND FAULT CODE 4961156 IN FAULT HISTORY.  REMOVED AND REPLACED APU ECU. OPS TEST AND BITE TEST GOOD REF FIM 49-60-00-810.

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