# SDR ASAA2019051229318

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2019
- Submitted: May 16, 2019
- Operation: Air carrier
- Aircraft: [N536AS](https://openairdocs.org/aircraft/N536AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35203
- Aircraft time: 28,534 hours, 8,197 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Unknown
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019051229318

## Discrepancy

APU WILL NOT START / NO ROTATION. GROUNDED - YES. T/S APU WOULD NOT START 4 TIMES AND THREW MAINT MESSAGE 49-41012 NO APU ROTATION SHUTDOWN EACH TIME SHUTDOWN & RESET POWER TO A/C. PERFORMED FIM 49-40 TASK 803, APU STARTS AND OPERATES NRML ON ALL SUBSEQUENT ATTEMPTS WITH NO FAILURES OR FAULTS.

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