# SDR AALA20110502TUL01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2011
- Submitted: May 5, 2011
- Operation: Air carrier
- Aircraft: [N476AA](https://openairdocs.org/aircraft/N476AA), registered now
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49651
- Aircraft time: 65,883 hours, 34,425 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Cadc
- Condition: Malfunctioned
- Location: Nr 1
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20110502TUL01

## Discrepancy

AUS - CREW REPORTED CAPTAINS AIRSPEED INDICATOR BECAME UNRELIABLE.  EMERGENCY DECLARED FLIGHT LANDED AUS WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED NUMBER ONE CENTRAL AIR DATA COMPUTER.  SYSTEM GROUND CHECK NORMAL OPERATION.

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