# SDR ASAA2021041834595

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 18, 2021
- Submitted: April 22, 2021
- Operation: Air carrier
- Aircraft: [N419AS](https://openairdocs.org/aircraft/N419AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41734
- Aircraft time: 30,000 hours, 9,672 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Malfunctioned
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021041834595

## Discrepancy

AUTOTHROTTLES WILL NOT ENGAGE. GROUNDED - YES. MX MSG 22-31687 LOGGED ON FLT LEGS 10 AND 13 FOR ASM 1. ACCOMPLISHED B737-900 FIM 22-32 TASK 819 INITIAL EVALUATION. SERVO MOTOR TEST PASSES. TORQUE TEST PASSES REF B737-900 AMM 22-31-00-710-802.

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