# SDR AALA20170906007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2017
- Submitted: September 7, 2017
- Operation: Air carrier
- Aircraft: [N936NN](https://openairdocs.org/aircraft/N936NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31176
- Aircraft time: 13,016 hours, 5,226 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 009385
- Condition: Failed
- Location: Left
- Part time: 3,860 hours, 1,602 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20170906007

## Discrepancy

EMERGENCY DECLARED.   RETURNED TO DEPARTURE DUE TO BOTH AUTO PILOTS AND NAVIGATIONAL AIDS FAILED.  LANDING UNEVENTFUL.  REMOVED AND REPLACED LEFT FLIGHT MANAGEMENT COMPUTER IAW AMM 34-61-02.  OPS CHECKED GOOD.  AIRCRAFT WAS GROUNDED.

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