# SDR SWAA2025100722152

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2025
- Submitted: October 7, 2025
- Operation: Air carrier
- Aircraft: [N8312C](https://openairdocs.org/aircraft/N8312C), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 38809
- Aircraft time: 42,977 hours, 20,443 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: R, Y
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025100722152

## Discrepancy

NUMBER 1 ENGINE ROLLED BACK/FAILED ON TAXI OUT.  R & R NR 1 ENGINE HMU PER AMM 73-21-10. OPS AND LEAK CHECK GOOD.

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