# SDR CALA2026022414051

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2026
- Submitted: February 24, 2026
- Operation: Air carrier
- Aircraft: [N17326](https://openairdocs.org/aircraft/N17326), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 67580
- Aircraft time: 8,298 hours, 2,789 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Navi Database
- Condition: Disengaged
- Location: Zone 200
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026022414051

## Discrepancy

VNAV DISENGAEGED AFTER TAKEOFF. WAS ABLE TO RENGAGE THROUGH ABT 7000 FEET PICTURE ATTACHED PERFORMED SENSOR STATUS CHECK ON BOTH FLIGHT MANAGEMENT COMPUTERS AND BOTH THE LEFT AND RIGHT FMC FAILED THE NETWORK FILE SERVER. FOLLOWED FIM 22-11 TASK D21. FOUND MSG 34-21122. PERFORMED FIM 34-21 TASK 827. VERIFIED POWER AT CONNECTOR D277 PIN 1 (115 VCA). VERIFIED CONTINUITY BETWEEN PINS 3&4 AT CONNECTOR D277 AND H8&J8 AT CONNECTOR D3687A. REMOVED AND REPLACED TOTAL AIR TEMP  PROBE IRW AMM 34-21-06. BONDING CHECKS GOOD. OPS CHECKS GOOD.

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