# SDR ASAA2020091403167

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2020
- Submitted: September 15, 2020
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 44,851 hours, 13,681 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Servo Motor
- Part number: 305RAA1
- Part serial: AS00910
- Condition: Intermittent
- Location: Autothrottles
- Part time: 24,987 hours, 9,341 cycles
- Stage of operation: NR
- 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/ASAA2020091403167

## Discrepancy

AUTOTHROTTLES WILL NOT REMAIN ENGAGED.  WILL MOMENTARILY ENGAGE, BUT KICKS OFF AFTER 3-5 SECONDS.  GROUNDED - YES.  INTERROGATED FMC, FOUND MULTIPLE FAULTS FOR ASM 1.  REMOVED AND REPLACED AUTOTHROTTLE SERVO MOTOR, IAW B737-800 AMM 22-31-91/401.  GROUND VERIFICATION TEST IS GOOD.

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