# SDR ASAA2021093036153

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 30, 2021
- Submitted: October 4, 2021
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 54,166 hours, 16,011 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: DE
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021093036153

## Discrepancy

FMC DISAGREE-VERTICAL MESSAGE PRIOR TO TOP OF DESCENT. UPON DESCENDING VERTICAL PROFILE BOTH SIDES APPEARED THE CAM. RAN QRH, MESSAGE DID NOT RETURN. GROUNDED - YES. RAN B737-800 FIM 34-61 TASK 835, NO FAULT NOTED, CLEAN HISTORY, NO EXISTING FAULTS. A/C OK FOR CONTINIOUS SERVICE.

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