# SDR SWAA2017110817670

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 6, 2017
- Submitted: November 8, 2017
- Operation: Air carrier
- Aircraft: [N8646B](https://openairdocs.org/aircraft/N8646B), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36935
- Aircraft time: 11,752 hours, 5,045 cycles
- System (JASC): [7321 · Fuel Control/Turbine Engines](https://openairdocs.org/jasc/7321)
- Part: Hmu
- Part number: 1853MB6P16
- Part serial: BECWC194
- Condition: Faulty
- Location: Nr 1 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2017110817670

## Discrepancy

AIR TURNBACK/DECLARED EMERGENCY, NR 1 ENGINE WOULD NOT INCREASE TO FULL POWER.  R&R HYDRO MECHANICAL UNIT PER MT.

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