Service difficulty report · Pitot Tube · Doug MD11F

Difficulty date
July 16, 2025
Submitted
July 16, 2025
Operation
Air carrier
Aircraft
N521FE
Make and model
Doug MD11F
Aircraft serial
48478
Aircraft time
91,598 hours, 18,005 cycles
Part
Pitot Tube
Part number
851DK
Condition
Clogged
Location
Zone 100
Stage of operation
CL
How discovered
O
Nature of condition
C, J
Precautionary procedure
A

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

What was found

RECEIVED ALT AND IAS ON TAKEOFF. ONCE AIRBORNE, IDENTIFIED #1 AIRSPEED/CADC WAS ERRONEOUS. COMPLETED CHECKLIST AND RETURNED FOR LANDING. PURGED CAPTAIN PITOT TUBE AND FOUND DEBRIS IN TUBE. LEAK CHECKED CAPTAIN AND STANDBY PITOT STATIC SYSTEM WITH NO LEAKS UP TO 26,000 FEET AND 300 KNOTS. NO FAULTS ON CAPTAIN'S ADC. ALL OPERATIONAL CHECK NORMAL

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