# SDR ASAA2016070317226

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2016
- Submitted: July 5, 2016
- Operation: Air carrier
- Aircraft: [N402AS](https://openairdocs.org/aircraft/N402AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41189
- Aircraft time: 14,454 hours, 4,694 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Left
- 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/ASAA2016070317226

## Discrepancy

LEFT FMC FAILED AT CRUISE ALTITUDE WITH VTK, THEN MAP ON CAPTAIN'S NAV AND NO FMC DATA ON EITHER CDU. AFTER 1 MINUTE, NORMAL FUNCTION RETURNED WITH NO CREW ACTION.  ACFT GROUNDED.  REBOOTED THE LT FMC PRECAUTIONARY.  LT FMC BITE TEST OK, IAW FIM 34-61TASK 804. THE FAULT WAS ONLY ON THE LT SIDE & THE SYSTEM RESET ITSELF IN FLIGHT, BOTH SIDES REBOOOTED TO MATCH UP. NO FAULTS NOTED ON RT FMC.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.