Summary
This document proposes to supersede Airworthiness Directive (AD) 2000-11-16, which currently applies to certain Quality Aerospace, Inc. (Quality Aerospace) (formerly Ayres Corporation) S2R series and Model 600 S2D airplanes. AD 2000-11-16 requires you to repetitively inspect the 1/4-inch and 5/16-inch bolt hole areas on the lower spar caps for fatigue cracking; replace or repair any lower spar cap where fatigue cracking is found; and report any fatigue cracking found. AD 2000-11-16 resulted from an accident of an Ayres S2R series airplane where the wing separated from the airplane in flight. Since AD 2000-11- 16, additional airplanes have been identified that were manufactured with a similar design to those affected by the AD and a third repair option has been developed. This proposed AD would retain the repetitive inspections and replacement (if necessary) requirements of the lower spar caps that are currently required in AD 2000-11-16, add additional airplanes to the Applicability of the AD, and add a third repair option. The actions specified by this proposed 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.