# SDR 2005FA0000508

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2005
- Submitted: April 19, 2005
- Operation: General aviation
- Aircraft: N39DK
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 480
- Engine: Garrtt TFE73122B
- System (JASC): [3414 · Airspeed/Mach Indicator](https://openairdocs.org/jasc/3414)
- Part: Adc
- Part number: 702490031304
- Part serial: 04100951
- Condition: Inoperative
- Location: Cockpit
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000508

## Discrepancy

THE PILOTS ALTIMETER FLAGGED DURING PREFLIGHT.  THERE ARE NO PRIOR REPORTS OF PROBLEMS ON THE ALTIMETRY SYSTEM.  THE ADC WAS REPLACED AND TESTED WITH NO FURTHER DEFECTS NOTED.  (K)

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