# SDR ASAA2015112413995

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2015
- Submitted: December 1, 2015
- Operation: Air carrier
- Aircraft: [N568AS](https://openairdocs.org/aircraft/N568AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35183
- Aircraft time: 33,771 hours, 10,432 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Warning Light
- Condition: False Activation
- Location: Apu
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015112413995

## Discrepancy

APU FAULT LIGHT ILLUMINATED.  ACFT GROUNDED.  ACCOMPLISHED APU BITE PROCEDURE REF FIM TASK 49-60, TASK 801.  SHOWED FAULT CODE 49-41245, START CONVERTER UNIT SHOWS GENERATOR UNDER VOLTAGE.  PERFORMED START CONVERTER UNIT SHOWS GEN UNDER VOLTAGE FAULT ISOLATION NO DEFECTS NOTED REF FIM TASK 49-40, TASK 807.  ACCOMPLISHED APU OPS TEST GROUND VERIFICATION TEST PASS REF AMM 49-11-00.  APU OPS CK NORMAL. ACCOMPLISHED APU BITE PROCEDURE AGAIN CURRENT STATUS PAGE AND MAINT HISTORY PAGE SHOWED NO NEW FAULTS.

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