# SDR ASAA2013090295915

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2013
- Submitted: September 4, 2013
- Operation: Air carrier
- Aircraft: [N409AS](https://openairdocs.org/aircraft/N409AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41733
- Aircraft time: 2,133 hours, 686 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Servo
- Part number: 305RAA1
- Part serial: AS09015
- Condition: Failed
- Location: Autothrottle
- Part time: 2,156 hours, 692 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013090295915

## Discrepancy

AUTOTHROTTLE WONT STAY ENGAGED, DISENGAGES AUTOMATICALLY FAULT 223-130-00.  ACFT GROUNDED. FOUND NUMEROUS FAULT CODE 22-31687 FOR ASM 1. UNABLE TO DUPLICATE.  REPLACED NR 1 ASM. INSTALLLATION TEST GOOD.  REF A/C MM 22-31-91.

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