# SDR ASAA2016101818392

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 2016
- Submitted: October 24, 2016
- Operation: Air carrier
- Aircraft: [N569AS](https://openairdocs.org/aircraft/N569AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35184
- Aircraft time: 36,821 hours, 11,361 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Malfunctioned
- Stage of operation: NR
- 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/ASAA2016101818392

## Discrepancy

AUTOTHROTTLE DISENGAGED, WOULD NOT RE-ENGAGE.  ACFT GROUNDED. PERFORMED AUTOTHROTTLE BITE/CURRENT STATUS CHECK AND FOUND NO CURRENT FAULTS. UNDER INFLIGHT FAULTS FOUND VARIOUS OCCURRENCES OF FAULT 22-31502 NO ASM DATA FOR ASM 2 ON FLIGHT LEG 17. PERFORMED  FIM 22-31 TASK 805 INITIAL EVALUATION AND NUMEROUS SERVO MOTOR TESTS. NO CURRENT FAULTS FOUND. PERFORMED A/T OPERATIONAL TEST, IAW AMM 22-31-00. NO FAULTS FOUND. AIRCRAFT UPGRADED TO CAT IIIA AUTOLAND AND HGS, IAW AMM 22-00-01. CAT STATUS PLACARD SCREW MOVED TO REFLECT SAME.

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