# SDR FDEA201211234136

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2012
- Submitted: December 18, 2012
- Operation: Air carrier
- Aircraft: [N625FE](https://openairdocs.org/aircraft/N625FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48753
- Aircraft time: 62,322 hours, 11,081 cycles
- System (JASC): [2200 · Auto Flight System](https://openairdocs.org/jasc/2200)
- Part: Dadc
- Part number: 91010302
- Part serial: 92030447
- Condition: Failed
- Stage of operation: TO
- How discovered: O
- Nature of condition: P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201211234136

## Discrepancy

FIRST OFFICER LOST AIRSPEED INFORMATION DURING TAKEOFF ROLL, SUSPECT DADC FAILURE.  AT 300FT AGL, CAPTAIN LOST FLT DIRECTOR CONTROL OF FCP ALT-SELECTOR AIRSPEED SEEMED OK.  WHEN F/O SWITCH TO CAPTAIN'S ADC, CAPTAIN'S SIDE GOT FLT DIRECT, AUTO PILOT, AUTO THROTTLES BACK. CAPTAIN'S SIDE AIRSPEED WAS GOOD BUT LOW SPEED FOOT WAS  APPROX 10-12 KTS.

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