EASA 2019-0231

Requires a one-time inspection of both left- and right-hand inboard flap fairings aft (IFFA) and, depending on findings, a follow-on inspection of the associated front inboard tension rod for chafing and modification or replacement of affected parts. On the PC-12 final assembly line, IFFAs were detected having an incorrect shape. Consequently, chafing between the IFFA and the associated front inboard tension rod could occur, possibly causing corrosion of the bare rod aluminum tube and reduce aluminum thickness. If not detected and corrected, this condition could lead to failure of the inboard flap drive arm with consequent asymmetric flap extension, EASA said.