Service difficulty report · Fitting · Swrngn SA227AC

Difficulty date
August 30, 2003
Submitted
October 15, 2003
Operation
General aviation
Make and model
Swrngn SA227AC
Engine
Garrtt TPE33111U
Propeller
Rotol R321482F8
Part
Fitting
Part number
2743062913
Condition
Cracked
Location
H/S Actuator
Part time
24,718 cycles
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

(AUS) HORIZONTAL STABILIZER PITCH TRIM ACTUATOR UPPER ATTACHMENT BRACKETS CRACKED ALONG LUG. FURTHER INVESTIGATION REVEALED THAT THERE WAS CONSIDERABLE CLEARANCE BETWEEN THE BUSHINGS AND ACTUATOR ROD ENDS WHICH RESULTED IN THE LUGS BEING STRESSED WHEN THE ATTACHING HARDWARE WAS TORQUED UP. COMPARISON WITH REPLACEMENT BRACKET FOUND THAT THE BUSHES INSTALLED IN BOTH BRACKETS WERE TOO SHORT THEREFORE ALLOWING THE LUGS TO BE STRESSED INWARDS PRIOR TO CLAMPING ONTO THE ROD END. THIS CAUSED BOTH BRACKETS TO CRACK ALONG THE OUTBOARD LUG. FOUND DURING INSPECTION IAW AD/SWSA226/68.