AD NUMBER: 2003-14-20
MANUFACTURER: AeroSpace Technologies of Australia Pty
Ltd. SUBJECT: Airworthiness Directive 2003-14-20
SUMMARY: This amendment supersedes Airworthiness
Directive (AD) 82-12-06, which applies to certain AeroSpace
Technologies of Australia Pty Ltd. (ASTA) Models
N22B and N24A airplanes. AD
82-12-06 currently requires repetitive visual inspections of all
rudder control lever shaft assemblies for cracks and discrepancies,
and, if cracks or discrepancies are found, it requires replacement
with new or serviceable rudder control shafts, and a check of the
fit of all rod end bearings in lever shafts. AD 82-12-06 also
allows you to inspect all lever shafts by magnetic particle
inspection or dye penetrant methods as terminating action for the
repetitive visual inspections. This AD is the result of recent
reports of failures of the upper control lever torque shaft due to
fatigue loading on the affected airplanes, including those that
included the terminating actions. This AD requires more detailed
repetitive inspections (than there are in AD 82-12-06) of the upper
and lower rudder pedal torque shafts and a one-time inspection for
discrepancies in the thickness of the lever shaft side plates with
appropriate follow-up action. The actions specified by this AD are
intended to detect and correct cracks in the rudder control lever
torque shafts and discrepancies in the thickness of the lever shaft
side plates, which could result in failure of the rudder control
lever torque shaft. Such failure could lead to reduced
controllability of the airplane.
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