Service difficulty report · Bearing · Urocop EC120B

Difficulty date
March 29, 2019
Submitted
August 17, 2020
Operation
General aviation
Make and model
Urocop EC120B
Aircraft time
4,756 hours
Engine
Tmeca ARRIUS2F
Part
Bearing
Condition
Seized
Location
Flex Cable
Part time
2,060 hours
Stage of operation
NR
How discovered
O
Nature of condition
F
Precautionary procedure
O

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

What was found

(CAN) FOLLOWING A REPORT OF THE COLLECTIVE JAMMING DURING TAKEOFF, THE AIRCRAFT FLIGHT AND ENGINE CONTROLS WERE INSPECTED. THERE WAS NO FAULT FOUND AT FIRST. THE HYDRAULIC CART WAS CONNECTED TO THE AIRCRAFT SERVOS AND THE COLLECTIVE WAS CYCLED UP AND DOWN MULTIPLE TIMES WHILE THE AME OBSERVED THE MOVEMENT THROUGHOUT THE LENGTH OF THE CYCLIC AND COLLECTIVE CONTROL SYSTEM. THE ROTOR BRAKE WAS INITIALLY SUSPECTED AND THEREFORE WAS DISASSEMBLED CLEANED AND INSPECTED BUT NO ISSUES WERE FOUND WITH IT. ALL THE CONTROL ROD BEARINGS WERE INSPECTED FOR FREE MOVEMENT AND ROTATION AND WERE FOUND TO BE OPERATING NORMALLY. FINALLY THE ANTICIPATOR CABLE WAS CHECKED AND THE AME FOUND A ROUGH SPOTS IN ITS TRAVEL AND THE BEARING ON THE GOVERNOR SUPPORT WAS FOUND SEIZED THEREBY PREVENTING THE FREE MOVEMENT OF THE CABLE THROUGHOUT ITS FULL TRAVEL. THE GOVERNOR CABLE AND BEARING WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE. FACTUAL FINDING REVEALED THAT THE INSPECTION OF THE ANTICIPATOR CABLE AND BEARING ARE SCHEDULED AT AN INTERVAL OF 500 HOUR OR 24 MONTH (WHICHEVER OCCURS FIRST) AS PER THE MANUFACTURER MASTER SERVICING MANUAL. AND THE AIRCRAFT HAS FLOWN 290 HOUR AND 11 MONTH SINCE THE LAST INSPECTION WAS CARRIED OUT. THIS INSPECTION WAS CARRIED OUT AND SIGNED OFF BY TWO AMES.

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