# SDR ASAA2021051534821

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2021
- Submitted: May 17, 2021
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 45,873 hours, 13,574 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Eec
- Part number: 2118966222
- Part serial: 50F0335
- Condition: Faulted
- Location: Apu
- Part time: 46,931 hours, 21,120 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021051534821

## Discrepancy

APU WONT START (LOW OIL PRESSURE AND FAULT LT ON). GROUNDED - YES. PERFORMED APU BITE B737-800 FIM 49-60-TASK 801. NO ACTIVE FAULTS FOUND. HISTORY SHOWED SEVERAL 49-15004. DUE TO HISTORY REMOVED AND REPLACED ECU REF B737-800 49-61-12/401. STARTED AND RAN APU 4X WITH NO DEFECTS. REF AMM 49-11-00-860-801. SYS OPS NML.

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