# SDR ASAA2013100596116

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2013
- Submitted: October 8, 2013
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 1,676 hours, 550 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Servo
- Part number: 305RAA1
- Part serial: AS09128
- Condition: Malfunctioned
- Location: Autothrottle
- Part time: 1,562 hours, 506 cycles
- 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/ASAA2013100596116

## Discrepancy

AUTO THROTTLE WILL NOT ARM.  ACFT GROUNDED.  VERIFIED ASM-1 FAULTS ON A/T FLT FAULT HISTORY.  REMOVED & REPLACED ASM -1 REF MM 22-31-91, ASM-1. OPS NORMAL REF SAME MM AND SERVO MOTOR TEST.

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