# SDR SCNA202409303122

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2024
- Submitted: October 1, 2024
- Operation: Air carrier
- Aircraft: [N821SY](https://openairdocs.org/aircraft/N821SY), registered now
- Make and model: Boeing 737-8FH
- Registry model: [Boeing 737-8FH](https://openairdocs.org/model/boeing-737-8fh) (OpenAirDocs)
- Aircraft serial: 39952
- Aircraft time: 29,000 hours, 9,544 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Condition: Inoperative
- Location: Zone 100
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SCNA202409303122

## Discrepancy

UPPON ARRIVAL FOUND APU INOP, VSAL AIR START CART TO  START #1 ENGINE WITH NO ISSUES CROSS BLEED START #2 ENGINE ALSO HASD NO ISSUES. BOTH IDG'S PICKUP WITH GOOD ELECTRICAL POWER. REPAIRED APU. REPLACED HMU AND FUEL PUMP OK TO INSTALL PERFORMED BY 31619. INSTALLED PER AMM 73-21-10&73-91-01 TESTED PER AMM 71-00-00-801-811 FOUND NO LEAKS WHEN NOTED AND ALL TESTS PASSED.RAN BOTH ENIGINES MULTIPLE TIMES SHUTTING ONE ENGINE OFFAT A TIME , TO MAKE SURE ELECTRICAL POWER SWITCH BUSSES AND NO PROBLEMS WHEN NOTED. ALSO RAN FLAPS AND SPEED BRAKES WITHOUT ANY ISSUES

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