# SDR ASAA2019042929199

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2019
- Submitted: May 14, 2019
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 41,773 hours, 12,670 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Servo Motor
- Part number: 305RAA1
- Part serial: AS09632
- Condition: Intermittent
- Location: Autotrottle Sys
- Part time: 17,776 hours, 5,537 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019042929199

## Discrepancy

AUTO THROTTLES WILL NOT STAY ENGAGED. GROUNDED - YES. RELEASED PER MEL 22-4B, MEL 22-9B, AUTO THROTTLES INOP. ACCOMPLISHED AUTOTHROTTLE BITE AND OPS TEST. NO FAULTS. REMOVED AND REPLACED NR 2 ASM DUE TO FAULT HISTORY ON 4/29/2019 LEG SHOWING FAULT 22-31688 FLAGGED SEVERAL TIMES. ALL REQUIRED TESTS PASSED. REF AMM 22-31-91. THIS CLEARS MEL 22-4B AND MEL 22-99B.

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