# SDR ASAA2021030734264

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 2021
- Submitted: March 11, 2021
- Operation: Air carrier
- Aircraft: [N495AS](https://openairdocs.org/aircraft/N495AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41728
- Aircraft time: 18,881 hours, 5,982 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Faulted
- 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/ASAA2021030734264

## Discrepancy

AUTOPILOT A WILL NOT ENGAGE. GROUNDED - YES. DFCS A F.F.R. SHOWED FOUND FAULT LOGGED ON ONLY 1 FLT LEG. PERFORMED B737-900 FIM 22-13 TASK 804, INITIAL EVALUATION TEST, AILERON TEST 20.31 GOOD NUMEROUS TIMES. PERFORMED LAND VERIFY BITE #49 , PASS WITH NO FAULTS.

---
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.