# SDR ASAA2023103045857

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2023
- Submitted: October 30, 2023
- Operation: Air carrier
- Aircraft: [N954AK](https://openairdocs.org/aircraft/N954AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44104
- Aircraft time: 3,541 hours, 1,017 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 016092
- Condition: Faulty
- Location: E/E Bay
- Part time: 3,596 hours, 1,030 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023103045857

## Discrepancy

IN CRUISE FLIGHT, CAPT'S NAV DISPLAY SHOWED VTK AND LOST ALL NAV DATA. FO'S MCDU DEFAULTED TO MENU FOR 30 SECONDS, THEN ALL RETURNED TO NORMAL OPS. GROUNDED - YES. (RESOLVED ON W/O: 1974809 TASKCARD: N/R-00001 ) REMOVED AND REPLACED CAPT FMC REF MM 34-61-02-400-801, OPS NML REF MM 34-61-00-750-803 AND MM 34-61-00-710-801. THIS CLEARS MEL 34-61-01A, REMOVED PLACARD C/N 26044954, SEAMC " PIDDIE " NOTIFIED. FMC SW MOVED TO NORMAL POSITION. OPENED AND CLOSED TWO C/B'S.

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