# SDR ASAA2013102796243

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 27, 2013
- Submitted: October 30, 2013
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 20,635 hours, 6,434 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Malfunctioned
- Stage of operation: CR
- 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/ASAA2013102796243

## Discrepancy

AUTOTHROTTLE ALLOWS MACH TO INDICATE .02 GREATER THAN SELECTED BEFORE BEGINNING TO REDUCE THROTTLE.  EXAMPLE SET TO .76, SPEED WENT TO .785 NEAR REDLINE BEFORE REDUCING. FL 360, TAT -21.  WORKED OK ON APPROX FOR HOLDING INDICATED AIRSPEED.  ACFT GROUNDED.  NO INFLT FAULTS, A/T CURRENT STATUS AND A/T SERVO MOTOR TESTS GOOD.  NO HISTORY LAST 60 DAYS PLUS.

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