# SDR FDEA201611103955

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 10, 2016
- Submitted: November 11, 2016
- Operation: Air carrier
- Aircraft: [N643FE](https://openairdocs.org/aircraft/N643FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48486
- Aircraft time: 60,717 hours, 13,695 cycles
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Adc
- Part number: 4059060901
- Part serial: 95100697
- Condition: Failed
- Location: Nr 2
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201611103955

## Discrepancy

FIRST OFFICER`S AIRSPEED FAILED AFTER TAKEOFF.  RAN CHECKLIST AND DETERMINED THAT CADC 2  HAD FAILED. RETURNED TO DEPARTURE.  R & R F/O'S ADC IAW AMM 34-16-01-4. OPS CHECKED GOOD. OK FOR SERVICE.

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