# SDR ASAA2022062638853

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2022
- Submitted: July 6, 2022
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 50,833 hours, 15,156 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Apu
- Part number: 38007021
- Part serial: P7222
- Condition: Faulty
- Location: Apu Compartment
- Part time: 16,448 hours, 27,965 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022062638853

## Discrepancy

APU FAULT LIGHT ON INITIAL START AT GATE. GROUNDED - YES. C/W B737-800 FIM 49-40- TASK 803. APU DID NOT START FAULT LIGHT CAME ON. PERFORMED BIT TEST FOUND MAINTENANCE MESSAGE 49-41012, RELEASED PER MEL 49-1B. VERIFIED NO HEAT DAMAGE OR DELAMINATION ON TAIL CONE. REPLACED THE APU PER ASA T/C 78349010. LEAK AND OPS CK GOOD.

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