# SDR SWAA2019072235148

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2019
- Submitted: July 23, 2019
- Operation: Air carrier
- Aircraft: N744SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29490
- Aircraft time: 70,547 hours, 42,004 cycles
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: Fuel Control
- Part number: 4419215
- Part serial: CUC12999
- Condition: Faulty
- Location: Apu
- Stage of operation: UK
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2019072235148

## Discrepancy

DIVERSION, AUXILIARY POWER UNIT GEN OFF BUS LIGHT ILLUMINATED IN FLIGHT DURING / USE SHOWS 0 VOLTS.  R&R AUXILIARY POWER UNIT FUEL CONTROL UNIT PER AMM.

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