# SDR ASAA2012122393525

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2012
- Submitted: December 26, 2012
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990
- Aircraft serial: 41731
- Aircraft time: 53 hours, 26 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Malfunctioned
- Stage of operation: TX
- 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/ASAA2012122393525

## Discrepancy

AUTOTHROTTLE WILL NOT ENGAGE. FYI - T/O DATA AT PUSH BACK CALLED FOR 27K MAX N1S 102.   ACCOMPLISHED AUTOTHROTTLE BITE TEST REF AMM 22-31-00-710-801. ACCOMPLISHED DFCS BITE TESTS 32 & 49.  ACCOMPLISHED HGS SENSOR TEST FOR FCC/AT. ALL TESTS PASSED GROUND VERIFICATION SUCCESSFUL.  AC IS CAT IIIA AUTOLAND  HGS QUALIFIED.  MOVED LWMP PLACARD STATUS SCREW TO REFLECT SAME.

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