# SDR 9WGA512201511204

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 2015
- Submitted: December 7, 2015
- Operation: Air carrier
- Aircraft: [N512JN](https://openairdocs.org/aircraft/N512JN), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48512
- Aircraft time: 94,482 hours, 12,768 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Pitot Line
- Condition: Blocked
- Location: Pitot/Static Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: G, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9WGA512201511204

## Discrepancy

IAS ALERT DISPLAYED AFTER 250 KNOTS.  CAPTAINS AIRSPEED DECREASING WHILE FIRST OFFICERS AIRSPEED WAS INCREASING, THEN LOSS ROLL BARS BOTH SIDES.  THEN LOSS OF BOTH CAPTAIN & FIRST OFFICERS PITCH BARS.  SELECTED AIRSPEED ALT LEVEL II & ELEVATOR FEEL LEVEL II.  PERFORMED PITOT TEST ON BOTH 1 & 2 CADC & FOUND 1 CMDC WITH 10 KNOTS DIFFERENCE BETWEEN COCKPIT INDICATION & PITOT TESTER.  FOUND DEBRIS IN CAPTAIN'S PITOT LINE.  CLEARED DEBRIS & REPLACED CAPTAINS CADC.  PERFORMED PITOT & STATIC TEST ALL NORMAL.

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