# SDR ASAA2023110846077

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 2023
- Submitted: November 13, 2023
- Operation: Air carrier
- Aircraft: [N990AK](https://openairdocs.org/aircraft/N990AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67424
- Aircraft time: 506 hours, 154 cycles
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: Fuel Control
- Part number: 707223652
- Part serial: CUC29439
- Condition: Faulty
- Location: Apu
- Part time: 233 hours, 350 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/ASAA2023110846077

## Discrepancy

FAULT CODE 49-31161 "FCU RESOLVER CIRCUIT SHOWS SHORT" FOUND WHILE PERFORMING T/C 05-020-01. GROUNDED - YES. (RESOLVED ON W/O: 1977120 TASKCARD: N/R-00001 ) REMOVED AND REPLACED APU FCU PER AMM 49-31-11NO LEAKS NOTED.PERFORMED APU BITEPER AMM 49-61-00NO EXISTING FAULTS FOUND.THIS CLEARS MEL 49-11-01MAINTENANCE PROCEDURES REVERSEDPLACARD REMOVED.

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