# SDR BSYA2011015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2011
- Submitted: April 4, 2011
- Operation: Air carrier
- Aircraft: [N27BL](https://openairdocs.org/aircraft/N27BL), registered now
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 163
- Aircraft time: 27,572 hours, 24,154 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 702490031304
- Condition: Failed
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BSYA2011015

## Discrepancy

AIRCRAFT TAXIING OUT OF MSN FOR DEPARTURE IN A HEAVY DOWN POUR WHEN THE AIR DATA COMP FAILED FLAGGING ALTIMETER, ALTITUDE ALERTER HORN AND FLAGS.  TAXIED BACK TO WISCONSIN AIR.  REMOVED AND REPLACED AIR-DATA COMPUTER, AIRCRAFT REMAINS RVSM COMPLIANT.

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