# SDR 9800399944

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N1309T](https://openairdocs.org/aircraft/N1309T), registered now
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 47316
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Cadc
- Part number: 2587400176
- Condition: Inoperative
- Location: E/E Compt
- Part time: 33,610 hours
- Stage of operation: CL
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9800399944

## Discrepancy

DURING CLIMB-OUT, CAPTAIN'S ALTIMETER AND VERTICAL AIRSPEED INDICATOR BECAME INOPERATIVE.  AIRCRAFT RETURNED TO ORIGINATION AND LANDED WITHOUT INCIDENT.  MAINTENANCE REPLACED THE NR 1 CENTRAL AIR DATA COMPUTER.  OPERATIONAL CHECK OK.

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