Service difficulty report · Support · Bell 206B

Difficulty date
December 6, 1998
Submitted
March 26, 2000
Operation
General aviation
Make and model
Bell 206B
Engine
Allsn 250C20
Part
Support
Part number
206001397001
Condition
Cracked
Location
Cyclic
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

(CAN) PILOT REPORTED NOT BEING ABLE TO ADJUST CYCLIC FRICTION. THE FRICTION ADJUSTMENT WOULD TURN, BUT FRICTION WOULD NOT INCREASE. ATTEMPTS AT ADJUSTING THE MINIMUM FRICTION DID NOT WORK. WHEN REMOVING SUPPORT ASSY TO CHANGE THE FRICTION BEARING, A CRACK IN THE PAINT WAS NOTED IN THE RELIEF HOLE AT THE END OF THE SLOT. THE PAINT WAS REMOVED AND THE CRACK WAS VERIFIED UNDER MAGNIFICATION. IT IS POSSIBLE THAT THE FRICTION BEARING BEING WORN HAD CAUSED ATTEMPTS TO OVERTIGHTEN THE ASSY THEREBY CAUSING EXCESSIVE STRESS IN THE RELIEF HOLE AREA LEADING TO THE CRACK. REPAIRED/REPLACED.

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