# SDR ASAA2013121696904

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 16, 2013
- Submitted: December 18, 2013
- Operation: Air carrier
- Aircraft: [N408AS](https://openairdocs.org/aircraft/N408AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41732
- Aircraft time: 4,041 hours, 1,282 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013121696904

## Discrepancy

MOMENTARY 1-2 MINUTE LOSS OF BOTH FMCS CDU DISPLAY AS WELL AS LNAV-VNAV DISENGAGING.   NO SPECIFIC QRH FOR THIS PROBLEM, SYSTEMS RETURNED TO NORMAL AFTER 2 MINUTES.  NAV DISPLAYS ON BOTH CAPT & F/O FINE DURING PROBLEM.  ACFT GROUNDED. PULLED AND RESET NR 1 AND 2 FMCS COMPUTER C/B AND PERFORMED FMCS SYS OPS TEST.  ALL TESTS PASS IAW MM 34-61-00.

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