# SDR ASAA2016051016689

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2016
- Submitted: May 16, 2016
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 12,232 hours, 3,950 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Warning Light
- Condition: False Activation
- Location: Apu
- Stage of operation: TX
- 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/ASAA2016051016689

## Discrepancy

1ST ATTEMPT ON APU START AFTER LANDING GOT AN APU FAULT LIGHT.  RAN QRH TURNED OFF APU SWITCH.  AFTER APPROX 3 MIN LIGHT EXTINGUISHED.  STARTED APU NORMALLY ON SECOND ATTEMPT.  ACFT GROUNDED.  FOUND FAULT 49-41254 LOGGED IN HISTORY.  FOLLOWED FIM 49-40 TASK 821, NO HISTORY 30 DAYS.  STARTED APU 3 TIMES, ALL STARTS GOOD. FAULT 49-41254 IN HISTORY ONLY.  NO CURRENT FAULTS.

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