# SDR AALA2020022549034

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2020
- Submitted: March 13, 2020
- Operation: Air carrier
- Aircraft: [N949AN](https://openairdocs.org/aircraft/N949AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29537
- Aircraft time: 57,701 hours, 23,852 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Gearbox
- Part number: 254A11473
- Condition: Faulty
- Location: Autothrottle Sys
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2020022549034

## Discrepancy

AIRCRAFT NOT GROUNDED: AUTO THROTTLE DISCONNECTED DURING TAKEOFF. ***SUPPLEMENTAL ACTION SECT 4 AND 5: REMOVED AND REPLACED LH AUTOTHROTTLE GEARBOX IAW AMM 22-31-91.***(CLOSED)

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