# SDR 2022FA0000555

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2022
- Submitted: September 29, 2022
- Operation: General aviation
- Aircraft: [N314RC](https://openairdocs.org/aircraft/N314RC), registered now
- Make and model: Cndair CL6002B16
- Aircraft serial: 5388
- Aircraft time: 8,740 hours, 3,673 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Air Data Module
- Part number: 8220842421
- Part serial: 2277
- Condition: Defective
- Location: Pilots
- Stage of operation: TO
- How discovered: O
- Nature of condition: N
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000555

## Discrepancy

PILOTS DISPLAY LOST ALL VSPEEDS DURING TAKEOF ROLL, TAKEOF WAS ABORTED.  V-SPEEDS REAPPEARED UPON TAXI BACK TO RAMP.  TROUBLESHOT SYSTEM USING PITOT/STATIC CART AT ALL AIRSPEEDS AND ALTITUDES, NOT DEFECTS NOTED.  CREW PERFORMED 2 HIGH SPEED TAXI WITH NO DEFECTS NOTED.  SWAPPED J#1 AND #2 ADC AND DISCREPANCY REAPPEARED ON CO-PILOT DISPLAY.  REPLACED THE SUSPECT #2 ADC UNIT, AND OPS TESTED GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.