MANUFACTURER: Short SUBJECT: Airworthiness Directive 2005-17-13 SUMMARY: The FAA is
adopting a new airworthiness directive (AD) for all Short Brothers
Model SD3-60 airplanes. This AD requires an inspection of the
rudder for damage, an inspection of the balance weight attachment
for discrepancies, an inspection of the rudder horn spar and cleats
for cracking and corrosion, and corrective action if necessary.
This AD results from events in which fatigue cracking was found on
the rudder horn spar. We are issuing this AD to detect and correct
cracking and corrosion of the rudder horn spar, which could lead to
detachment of the mass balance weight of the rudder. The detachment
of the mass balance weight could jam or restrict the movement of
the rudder, which could result in reduced controllability of the
airplane. Loss of a mass balance weight could also damage other
parts of the airplane, which could result in reduced
controllability of the airplane, or could result in an injury to a
person or damage to property on the ground.