Service difficulty report · Lever · Grob G120A

Difficulty date
September 29, 2003
Submitted
October 8, 2003
Operation
General aviation
Aircraft
N867AF
Make and model
Grob G120A
Aircraft serial
85007
Engine
Lyc AEIO540D4D5
Part
Lever
Part number
120A4240
Condition
Binding
Location
Aileron
Part time
639 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

DURING FLEET WIDE INSPECTION, FOUND BEARINGS IN AILERON LEVER 2 ASSY. PN 120A4242 TO BE DAMAGED AND BINDING. DAMAGE APPEARS TO BE CAUSED BY THE BUSHING PN 120A4435.02 IN THE FORK ENDS PN 120A4435.01. IT APPEARS THAT DESIGN LIMITATIONS OF THE BEARINGS ALLOWING BUSHING TO APPLY EXCESSIVE FORCE ON BEARING DURING FULL DEFLECTION. RECOMMEND REDESIGN OF FLIGHT CONTROL SYSTEM OR REPLACE BEARINGS WITH NEW BEARINGS WITH NEW BEARINGS THAT HAVE GREATER LIMITS.

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