# SDR DALA2025122309339

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2025
- Submitted: December 23, 2025
- Operation: Air carrier
- Aircraft: [N947DZ](https://openairdocs.org/aircraft/N947DZ), registered now
- Make and model: Boeing 737-9GPER
- Registry model: [Boeing 737-9GPER](https://openairdocs.org/model/boeing-737-9gper) (OpenAirDocs)
- Aircraft serial: 38689
- Aircraft time: 32,118 hours, 17,551 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Servo Motor
- Condition: Faulted
- Location: Autothrottle
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025122309339

## Discrepancy

ATO- APPROX. 5 KNOTS DUE TO LEFT THROTTLE DID NOT ADVANCE WHEN TOGA SELECTED.   FORWARD TO MEL VIA FLIGHT CREW PLACARD. RECORDED FAULT CODE 22-31687 (ASM-1 RATE MON). NEED ASM-1 REPLACED. CONTINUE ON MEL. 22DEC25 REPLACED LEFT AUTO THROTTLE SERVO MOTOR PER B737 AMM 22-31. (LP 1356655)

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