# SDR ASAA2022061138613

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 11, 2022
- Submitted: June 13, 2022
- Operation: Air carrier
- Aircraft: [N933AK](https://openairdocs.org/aircraft/N933AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44098
- Aircraft time: 758 hours, 221 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Apu
- Part number: 11519681
- Condition: Failed
- Location: P91, Panel 1
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022061138613

## Discrepancy

AC WILL NOT TAKE GROUND POWER. GROUNDED - YES. FLIGHT CREW FURTHER CLARIFIED THAT APU WOULD NOT START, NO GROUND SERVICE POWER (SYMPTOMS DESCRIBED IN B737-9 IFIM TASK 24-22-00-810-801). REMOVED AND REPLACED AUXILIARY POWER BREAKER C803 PER B737-9 AMM 24-21-41. ALSO REMOVED AND RE-INSTALLED #1 GCB C801 FOR ACCESS. ALL INSTALLATION TESTS PASS. GROUND POWER, APU, AND APU GENERATOR ALL OPERATE NORMALLY. ETOPS GROUND VERIFICATION SUCCESSFUL.

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