# SDR ASAA1159279

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2011
- Submitted: March 22, 2011
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 16,869 hours, 5,301 cycles
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: Fuel Control
- Part number: 4419215
- Part serial: CUC11593
- Condition: Faulty
- Location: Apu
- Part time: 4,089 hours, 3,975 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1159279

## Discrepancy

APU WILL NOT START FAULT LIGHT ON.  ACCOMPLISHED APU BITE TEST.  FOUND FAULT CODES: 49 31175 49 52192 49 31160 49 31168 & 49 52188.  REPLACED APU FUEL CONTROL UNIT REF MM 49 31 11 000 801 / 49 31 11 400 80.  PERFORMED FUEL CONTROL UNIT INSTALLATION TEST NO DEFECTS NOTED.  PERFORMED APU BITE PROCEDURE NO CURRENT MAINT MESSAGES.

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