# SDR SWAA118000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2011
- Submitted: November 21, 2011
- Operation: Air carrier
- Aircraft: N417WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29822
- Aircraft time: 35,429 hours, 20,648 cycles
- Engine: Cfmint CFM567B22
- System (JASC): [7321 · Fuel Control/Turbine Engines](https://openairdocs.org/jasc/7321)
- Part: Hmu
- Part number: 442355
- Part serial: CW1731
- 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/SWAA118000

## Discrepancy

AIR TURNBACK/DECLARED EMERGENCY  - COMPRESSOR STALL SUSPECTED ON NR 1 ENGINE DURING CLIMBOUT 11,000FT WITH THRUST LEVERS STABILIZED NO ABNORMAL INDICATOINS AFTER INITIAL STALL.  REMOVED AND REPLACED NR 1 ENG HMU PER MM.

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