# SDR ASAA0852873

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2008
- Submitted: May 5, 2008
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 4,816 hours, 1,408 cycles
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Computer
- Part number: 4082499903
- Condition: Faulty
- Location: Cockpit
- Stage of operation: TX
- 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/ASAA0852873

## Discrepancy

SPEED TRIM FAIL AND MACH TRIM FAIL LIGHTS CAME ON DURING RECALL CHECK AFTER ENGINE START.  F/O'S FD FLAG ALSO CAME ON.  VERIFIED FAULT.  FCC "B" COMPUTER INOP.  REPLACED FCC "B" COMPUTER.  PERFORMED LRU TEST FOR FCC & LAND VERIFY TEST.  HGS SENSOR TEST FOR FCC PASS.

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