# SDR P5CA0300979

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2003
- Submitted: November 10, 2003
- Operation: Air carrier
- Aircraft: N524UP
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 21446
- Aircraft time: 68,099 hours, 18,116 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 19039254
- Part serial: 761102
- Condition: Failed
- Location: E/E Bay
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA0300979

## Discrepancy

NR 2 CADC FAILED EN ROUTE (AIRTURN BACK).  REMOVED AND REPLACED NR 2 CADC, TEST OK PER MM 34-12-00.

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