# SDR ASAA2016112918886

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2016
- Submitted: December 1, 2016
- Operation: Air carrier
- Aircraft: [N472AS](https://openairdocs.org/aircraft/N472AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60580
- Aircraft time: 6,661 hours, 2,140 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Right
- Stage of operation: CR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016112918886

## Discrepancy

ENROUTE FL320 MACH .80 RIGHT FMC FAILED. RIGHT VTK ON F/O MAP APPEARED. LNAV-VNAV DISENGAGED, A/P WENT TO CWS ROLL, ALTITUDE HOLD. AFTER 20 SECONDS THE RIGHT FMC RESTORED ITSELF, LNAV-VNAV FUNCTION NORMAL. GROUNDED - YES. PERFORMED FMCS BITE PER B737-900 FIM 34-661 TASK 801. CURRENTLY NO SENSOR FAULTS. LEFT FMC SHOWED INFLIGHT FAULT FOR RIGHT FMC AS INTERMITTENT, MESSAGE " FMC-R DATE RATE I." PERFORMED B737-900 FIM 34-61-TASK 807, BOTH FMC PASSED. CHECKS GOOD FOR SERVICE.

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