# SDR SWAA2026061612718

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2026
- Submitted: June 17, 2026
- Operation: Air carrier
- Aircraft: [N917WN](https://openairdocs.org/aircraft/N917WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36624
- Aircraft time: 58,387 hours, 35,479 cycles
- Engine: Cfmint CFM567B242
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Condition: Slow
- Location: Nr 1 Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026061612718

## Discrepancy

NR 1 ENG SLOW TO SPEED (NR 2 AT +50% BEFORE NR 1 MOVED FROM 10%) (6-8 SECONDS BEHIND NR 2) ONCE STABILIZED ALL INDICATIONS NORMAL. RESPONDED NORMAL ONCE ABOVE 45%.  REMOVED AND REPLACED NR 1 HMU IAW AMM 73-21-10 AND MT 773-21-10.  PERFORMED TEST NR 8 IAW AMM 71-00-00.

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