# SDR AALA202001189009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2020
- Submitted: January 18, 2020
- Operation: Air carrier
- Aircraft: [N858NN](https://openairdocs.org/aircraft/N858NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30904
- Aircraft time: 29,105 hours, 11,871 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Defective
- Location: Cockpit
- Stage of operation: TO
- 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/AALA202001189009

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: TAKEOFF WITH NR 1 F/D ENGAGED - AUTOTHROTTLE SET T/O POWER WHEN TO/GA WAS SELECTED BUT TO/GA WOULD NOT DESELECT WHEN VNAV LVL CHG OR VERT SPEED MODES WERE SELECTED CONTINUED. CA FMA PITCH MODE BLANKED AND A YELLOW PITCH MODE WARNING DISPLAYED ON CAPT NAVDISP. NR 1 F/DSELECTED OFF NR 2 F/D A/P SELECTED ON AND ALL PITCH FUNCTIONS WORKED. REPLACED REPLACED RIGHT FLIGHT MANAGEMENT COMPUTER PER AMM 34-61-02. FLIGHT MANAGEMENT COMPUTER OPERATIONAL TEST NORMAL.

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