# SDR REXA2025041000405

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2025
- Submitted: April 10, 2025
- Operation: Air carrier
- Aircraft: [N314PQ](https://openairdocs.org/aircraft/N314PQ), registered now
- Make and model: Cndair CL6002D24
- Aircraft serial: 15314
- Aircraft time: 23,775 hours, 18,066 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Computer
- Part number: 8220372638
- Condition: Inoperative
- Location: Air Data
- Stage of operation: CR
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/REXA2025041000405

## Discrepancy

OBSERVED UP TO 50 KNOT AIRSPEED DIFFERENCE BETWEEN CA AND ISI DURING CRUISE @ FL350, ALSO RECEIVED MACH TRIM CAUTION, RUD LIMIT FAULT 2, R FADEC FAULT 2, AND L FADEC FAULT 2 MESSAGES. FOLLOWED QRH FOR UNRELIABLE AIRSPEED. R/R ADC #1 IAW CRJ900 AMM 34-13-01. BITE TEST GOOD. OPS TEST GOOD. LEAK CHECK PERFORMED, NO LEAKS DETECTED AT THIS TIME.

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