Service difficulty report · Thrust Bearing · Snias AS350BA

Difficulty date
March 28, 2011
Submitted
September 14, 2015
Operation
General aviation
Make and model
Snias AS350BA
Aircraft time
6,053 hours
Engine
Tmeca ARRIEL1B
Part
Thrust Bearing
Part number
LB4123111
Condition
Cracked
Location
M/R Head
Part time
1,683 hours
Component
Head · Snias
Component part number
350A31000004
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) ELASTOMERIC PORTION OF SPHERICAL THRUST BEARING FOUND CRACKED BEYOND ALLOWABLE LIMITS. MAX ALLOWED DEPTH=10MM, AS FOUND=19MM. MAX ALLOWABLE LENGTH= 20MM, AS FOUND=58MM. PART NOTED TO HAVE ONLY BEEN IN SERVICE FOR 26 PERCENT OF THE COMPONENT RETIREMENT LIFE OF 6400 HRS. THIS CRACK WAS DETECTED DURING A SCHEDULED 100 HR INSPECTION.