# SDR ASAA2016082317787

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2016
- Submitted: August 29, 2016
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 30,629 hours, 9,218 cycles
- System (JASC): [4960 · APU Controls](https://openairdocs.org/jasc/4960)
- Part: Warning Light
- Condition: Illuminated
- Location: Apu
- 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/ASAA2016082317787

## Discrepancy

APU FAULT LIGHT ILLUMINATED DURING START ATTEMPT.  LIGHT EXTINGUISHED ONE MINUTE AFTER SWITCH TURNED OFF. NO SUBSEQUENT START ATTEMPTED. ACFT GROUNDED.   PERFORMED APU BITE, FOUND MESSAGE 49-41012, NO ROTATION SHUTDOWN.  INSPECTED MAGNETIC CHIP DETECTOR, IAW AMM 49-91-81. NO DEFECTS NOTED AT THIS TIME.  PERFORMED SECOND BITE CHECK OF APU, MESSAGE 49-41012 STILL EXISTS IN FAULT AFTER PERFORMING SECOND SUCCESSFUL GROUND START.  INFLIGHT APU START ATTEMPT WAS SUCCESSFUL.

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