# SDR AALA201911019005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2019
- Submitted: November 1, 2019
- Operation: Air carrier
- Aircraft: N192AN
- Make and model: Boeing 757223
- Aircraft serial: 32386
- Aircraft time: 64,090 hours, 16,737 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: False Indication
- 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/AALA201911019005

## Discrepancy

AIRCRAFT NOT GROUNDED: IN CRZ AT FL 390 DUAL FMC FAILURE. LNAV RECOVERED IN 5 MINUTES VNAV REMAINED INOP. QRH CALLED  FOR SELECTION OF ALTERNATE NAV SELECTOR, THIS DID NOT CLEAR PROBLEM. ACCOMPLISHED FMC BITE IAW FIM 34-61-00 ALL CKD NORMAL.

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