Service difficulty report · Probe · Doug MD11F

Difficulty date
November 25, 2018
Submitted
November 26, 2018
Operation
Air carrier
Aircraft
N584FE
Make and model
Doug MD11F
Aircraft serial
48436
Aircraft time
83,486 hours, 19,144 cycles
Part
Probe
Part number
851DK
Condition
Failed
Location
Pitot/Static Sys
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON CLIMBOUT FLIGHT DIRECTOR WAS GIVING INACCURATE INFO, BUT IT STARTED WORKING AT ALTITUDE IAS COMPARATOR WITH MOMENTARY ELEVN & YAW WARNING ACCOMPANIED BY AUTO-PILOT FAIL. ON RETURN RECEIVED FADEC ALT ALERT. QRH DIRECTED AIRSPEED UNRELIABLE CHECKLIST. SELECTED CAPTAIN STATIC AIR SOURCE TO ALT AND INSTRUMENTS AGREED WITH STBY & FO ALSO RECEIVED THRUST LIMIT MISMATCH ON MCDU. REMOVED & REPLACED CAPTS PITOT PROBE IAW AMM 34-11-01-2. ALL TESTS PASSED, AWAITING SEALANT CURE TIME.

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