# SDR ASAA2013081695813

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2013
- Submitted: August 20, 2013
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 19,895 hours, 6,217 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Converter
- Condition: Failed
- Location: Apu
- Component: Apu
- Component part number: 1152466250
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013081695813

## Discrepancy

APU FAILED TO START.  ACFT GROUNDED.  PERFORMED APU BIT.  FAULT CODE 49-41250 PRESENT. REMOVED APU START CONVERTER UNIT IAW AMM 49-41-61-000-801 INSTALLED APU START CONVERTER UNIT IAW AMM 49-41-61-400-801 3.F.(1).  OPS CK GOOD,  REF MM  49-41-61.

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