# SDR IPXA10M61245

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2010
- Submitted: July 23, 2010
- Operation: Air carrier
- Aircraft: [N254UP](https://openairdocs.org/aircraft/N254UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48406
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Cadc
- Part number: 4059060901
- Part serial: 92040455
- Condition: Inoperative
- Location: Cockpit
- 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/IPXA10M61245

## Discrepancy

DURING CLIMBOUT AT ABOUT 8000', ALT COMPARATOR WARNING FOLLOWED SHORTLY BY WINDSHEAR FAIL ALERT. NR 1 AP IN USE.  ACFT ON A/P WOULD NOT LEVEL OFF, AT 12000' IAS COMPARATOR CAME. ALT ALERT WINDOW SHOWED ALL DASHES. SWITCHED F/O TO NR 1 CADC. INDICATIONS RETUNED TO NORMAL.  A/P 1 & 2 BOTH WORKED AFTER F/O ON CADAC.  R AND R NR 2 CADC IAW AMM 34-16-01-4. PERFORMED PITOT STATIC CHECK IAW AMM 34-11-00-2 WITH NO DEFECTS NOTED.

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