# SDR ASAA2017021419816

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2017
- Submitted: February 16, 2017
- Operation: Air carrier
- Aircraft: [N518AS](https://openairdocs.org/aircraft/N518AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35693
- Aircraft time: 30,996 hours, 9,188 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Unknown
- Condition: Malfunctioned
- Location: Autotrottle Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017021419816

## Discrepancy

AUTOTHROTTLES WILL NOT STAY ENGAGED. GROUNDED - YES. LAST FLT, A/T FLT FAULT SHOWS A/T ENG 28V DC INV 22-31543. PERFORMED FIM 22-31 TASK 802 / 22-31 TASK 801, A/T CURRENT STATUS AND A/T INTERACTIVE SERVO MOTOR TESTS NUMEROUS TIMES WITH NO FAULTS. NO HISTORY LAST 6 MONTHS. GROUND VERIFICATION TEST GOOD. REF LWMP SYSTEM TABLE: A/T OPERATIONAL TEST REF AMM 22-31-00 GOOD. A/C REMAINS CAT IIIA AUTOLAND AND HGS. STATUS SCREW SHOWS SAME.

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