# SDR ASAA2018121327378

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2018
- Submitted: December 15, 2018
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 16,857 hours, 5,532 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Computer
- Part number: 8221604102
- Part serial: 43RHM0
- Condition: Failed
- Location: Autothrottles
- Part time: 16,864 hours, 5,534 cycles
- Stage of operation: DE
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018121327378

## Discrepancy

AUTO THROTTLES DISCONNECTED IN DESCENT W/RED AUTO THRUST LIGHT. TRIED TO REENGAGE, DID NOT WORK. "RETARD" STILL DISPLAYED ON FMA. GROUNDED - YES. REMOVED AND REPLACED FCC-AA. OPS TEST GOOD. ALL REQUIRED TESTS PASSED. REF B737-900 AMM 22-11-33.

---
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.