# SDR SWAA2026071320137

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 9, 2026
- Submitted: July 14, 2026
- Operation: Air carrier
- Aircraft: [N8789Q](https://openairdocs.org/aircraft/N8789Q), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 67776
- Aircraft time: 11,881 hours, 5,933 cycles
- Engine: Cfmint LEAP1B28
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Fmu
- Condition: Fluctuates
- Location: Nr 1 Engine
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026071320137

## Discrepancy

NR 1 ENGINE THRUST ALERT APX 3 SECONDS FOLLOWED BY W/ENGINE INDICATIONS FLUCTUATING FLUCTUATING N1, EGT, N2, FF MINOR FLUCTUATIONS. IN DESCENT WITH PARTIAL THRUST APX 75% N1. INDICATIONS STABLE DURING APPROACH.   ACCOMPLISHED IFIM 73-00-00-810-C05.  REMOVED AND REPLACED NR 1 ENGINE FUEL METERING UNIT IAW AMM 73-21-04.

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