# SDR ASAA2022051238313

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2022
- Submitted: May 16, 2022
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 48,472 hours, 14,439 cycles
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: Fcu
- Part number: 4419215
- Part serial: CUC16789
- Condition: Faulty
- Location: Apu
- Part time: 259 hours, 158 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022051238313

## Discrepancy

APU FAULT LIGHT CAME ON DURING START OF APU. GROUNDED - YES. PERFORMED WIRE CHECKS IAW B737-800 FIM 49-32 TASK 805 NO FAULTS FOUND IN WIRING. REMOVED AND REPLACED APU FCU. PERFORMED GROUND TEST NO DEFECTS NOTED.

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