# SDR ASAA2019101230999

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2019
- Submitted: October 22, 2019
- Operation: Air carrier
- Aircraft: [N585AS](https://openairdocs.org/aircraft/N585AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35683
- Aircraft time: 45,874 hours, 13,763 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Malfunctioned
- Stage of operation: CL
- 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/ASAA2019101230999

## Discrepancy

AUTO THROTTLE DISENGAGED ON TAKEOFF WHEN TOGA BUTTON WAS PRESSED. AUTO THROTTLE ARM SWITCH RELEASED TO OFF AND RED AUTOTHROTTLE ALERT LIGHT FLASHED UNTIL RESET. TRIED TO RE-ENGAGE AUTO THROTTLE ON TAKE OFF, CLIMB AND CRUISE WITHOUT SUCCESS. GROUNDED - YES.   PERFORMED FIM 22-31TASK 801 SYSTEM OP CHECKS GOOD NO DEFECTS NOTED AT THIS TIME. PERFORMED LLM TEST REFERENCE AMM 22-00-01 NO DEFECTS NOTED. AIRCRAFT IS HGS/AUTOLAND QUALIFIED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.