AD 2000-11-16 65 FR 36055 Active

This amendment supersedes Airworthiness Directive (AD) 97-17- 03, which currently requires you to accomplish the following on Ayres Corporation (Ayres) S2R Series and Model 600 S2D airplanes: inspect the \1/4\-inch and \5/16\-inch bolt hole areas on the lower spar caps for fatigue cracking; replace any lower spar cap where fatigue cracking is found; and report any fatigue cracking. This AD retains the inspection and replacement (if necessary) requirements of the lower spar caps that are currently required in AD 97-17-03. This AD also makes these inspections repetitive, adds additional airplanes to the Applicability of the AD, changes the initial compliance time for all airplanes, and arranges the affected airplanes into groups (six) based on usage and configurations. The existing AD was the result of an accident of an Ayres S2R series airplane where the wing separated from the airplane in flight. The actions specified by this AD are intended to detect and correct fatigue cracking of the lower spar caps, which could result in the wing separating from the airplane with consequent loss of control of the airplane.