# SDR AALA202008109038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 2020
- Submitted: August 11, 2020
- Operation: Air carrier
- Aircraft: [N916AN](https://openairdocs.org/aircraft/N916AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29517
- Aircraft time: 61,879 hours, 25,164 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1741010301
- Condition: Defective
- Stage of operation: CR
- 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/AALA202008109038

## Discrepancy

AIRCRAFT GROUNDED - COMMAND B AUTOPILOT DISENGAGED IN FLIGHT, CAUTION & WARNING SYSTEM: R & AP/P/RST (RIGHT AUTOPILOT, PUSH TO RESET) ILLUMINATED, COULD NOT RE-ENGAGE.  FIRST OFFICER'S FLIGHT DIRECTOR ALSO FAILED.  REPLACED LEFT AND RIGHT FMCS (FLIGHT MANAGEMENT COMPUTER SYSTEM).  ACCOMPLISHED SOFTWARE UPLOAD FOR BOTH, PER AMM 34-61-00, ALL CHECKS OKAY.  ACCOMPLISHED LAND VERIFICATION PER AMM 22-11-00, ALL CHECKS PASSED, OKAY FOR SERVICE.

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