Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all SD3-30, SD3-60, SD3-60 SHERPA, and SD3 SHERPA series airplanes. This proposal would require repetitive visual inspections of the flap levers and bracket assembly of the inner flap sub-assembly of the left and right wings to detect certain discrepancies; and corrective actions, if necessary. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to detect and correct failure of the levers and bracket assembly, which could result in uncommanded retraction of the inner flap assembly and consequent reduced controllability of the airplane.