# SDR ASAA2017011119320

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2017
- Submitted: January 13, 2017
- Operation: Air carrier
- Aircraft: [N468AS](https://openairdocs.org/aircraft/N468AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41735
- Aircraft time: 10,115 hours, 3,360 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Switch
- Part number: C2006
- Condition: Failed
- Location: Autothrottle Sys
- 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/ASAA2017011119320

## Discrepancy

AUTOTHROTTLES WILL NOT ENGAGE.  ACFT GROUNDED. A/T CURRENT STATUS ATTEMPTED, A/T WILL NOT ENGAGE. FOUND THE NR 1 A/T SWITCH NOT CLICKING, SUSPECT BAD SWITCH. FAULT CONFIRMED WITH INPUT FAILED THE TEST. REMOVED AND REPLACED A/T DISENGAGE SWITCH. INSTALLATION TESTED GOOD, OPS TESTED GOOD IAW AMM 22-31-51 AND 22-31-00.

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