# SDR SWAA2026010859145

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2026
- Submitted: January 8, 2026
- Operation: Air carrier
- Aircraft: [N231WN](https://openairdocs.org/aircraft/N231WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32499
- Aircraft time: 65,509 hours, 39,378 cycles
- Engine: Cfmint CFM567B242
- System (JASC): [7314 · Engine Fuel Pump](https://openairdocs.org/jasc/7314)
- Part: Pump
- Condition: Failed
- Location: Nr 1 Fuel Sys
- Stage of operation: TO
- How discovered: O
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026010859145

## Discrepancy

ON TAKEOFF ROLL, NR 1 ENGINE ONLY PRODUCED 80.7% N1 WITH 85% COMMANDED,  NR 2 WAS NORMAL. EECS WERE ON.  NO CAUTIONS OR WARNINGS. AIRBORNE NR 1 WOULD ONLY PRODUCE 83.3% AT 5000'. WHEN BACK AT THE GATE, NR 1 WOULD NOT SHUT DOWN ON ITS COMMAND TO CUTOFF.  IT DID SHUTDOWN ON SECOND ATTEMPT IDLE BACK TO CUT OFF.   REMOVED AND REPLACED NR 1 ENGINE FUEL PUMP PACKAGE IAW MT773-11-00. ENGINE RUN AND LEAK CHECKED NORMAL.

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