# SDR DXTA200501023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2005
- Submitted: October 17, 2005
- Operation: Air carrier
- Aircraft: N338QS
- Make and model: Cessna 680CE
- Aircraft serial: 6800011
- Aircraft time: 835 hours, 577 cycles
- System (JASC): [3414 · Airspeed/Mach Indicator](https://openairdocs.org/jasc/3414)
- Part: Air Data Module
- Part number: HG1153CA02
- Part serial: 04050669
- Condition: Failed
- Location: Cockpit
- Part time: 835 hours, 577 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: S
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA200501023

## Discrepancy

AIR SPEED RT PFD FAILED, NO AIRSPEED INDICATION ON TAKEOFF ROLL.  LEAK CHECKED COPILOT PITOT STATIC SYSTEM WITH NO DEFECTS NOTED.  SYSTEM OPERATED NORMALLY.  SWAPPED NR 1 AND NR 2 AIR DATA MODULES FOR FURTHER TROUBLESHOOTING IAW CE680 M/M CH 34-12-00, 34-11-00.  PERFORMED STATIC LEAK CHECK IAW FAR 91.411.  LEAK AND OPERATIONAL CHECKS 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.