# SDR IPXA2014071183577

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2014
- Submitted: July 11, 2014
- Operation: Air carrier
- Aircraft: [N257UP](https://openairdocs.org/aircraft/N257UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48451
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Cadc
- Condition: Inoperative
- Location: Nr 2
- 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/IPXA2014071183577

## Discrepancy

AFTER TAKEOFF,  AIRSPEEDS SHOWED 80KTS CAPTAIN`S AIRSPEED AND STBY NORMAL. SELECTED CADC ON F/O SIDE TO RECOVER DATA. MULTIPLE CADC MESSAGE DISAPPEARED AFTER F/O ON 1 CADC STATIC  AIR AFTER F/O ON 1 CADC.  R & R NR 2 CADC. REF AMM 34-16-01. R & R FMC-2, REF AMM 34-63-01.  R & R F/O PITOT TUBE REF AMM 34-11-01. NO LEAKS NOTED. F/O AIRSPEED CHECKED NORMAL.

---
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.