# SDR ASAA2016041516425

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2016
- Submitted: April 18, 2016
- Operation: Air carrier
- Aircraft: [N409AS](https://openairdocs.org/aircraft/N409AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41733
- Aircraft time: 12,899 hours, 4,211 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Warning Message
- Condition: Activated
- Stage of operation: IN
- 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/ASAA2016041516425

## Discrepancy

WHILE PERFORMING NR 49 LAND VERIFY BITE STEP 49.35, FAILS FCC A AND FCC B FOR AILERON POSITION SENSOR NR 1 AND AILERON POSITION SENSOR NR 2, FAULT MAINTENANCE MESSAGES 22-11145 & 22-11146.  ACFT GROUNDED.  PERFORMED BITES 49.35 AND 60.35 NUMEROUS TIMES.  NO HELP, REF FIM 22-12, TASK 813 FOR T/S.  RAN LAND VERIFY IAW AMM 22-01-05, OPS NORMAL.

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