# SDR ASAA2023101145565

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2023
- Submitted: October 16, 2023
- Operation: Air carrier
- Aircraft: [N448AS](https://openairdocs.org/aircraft/N448AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36356
- Aircraft time: 26,822 hours, 8,367 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023101145565

## Discrepancy

WHILE PERFORMING TC 78222000 - SYS. FAILS AILERON TEST. BITE 60-31. MSG 1111340 CAME UP SEVERL TIMES. PER FIM AN FFC SWAP IS REQ. FOR T/S. RMVD AND INSATLLED NEW FCC B. NO HELP. NEW FAIL MSG 22-11146. "AILERON SENSOR 2M937" REQ REPLACEEMENT. REINSTALLED ORIGINAL FCC B, PERFORMED OPS TESTS. AND REQUIRED LLM TESTS. ALL TESTS PASSED. GROUNDED - YES. ON DEFERRAL.

---
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.