AD NUMBER: 2006-15-03
MANUFACTURER: Pilatus
SUBJECT: Airworthiness Directive 2006-15-03 SUMMARY: We are adopting a
new airworthiness directive (AD) that supersedes AD 2003-13-04,
which applies to certain Pilatus Aircraft Ltd (Pilatus) Model PC-6
airplanes. AD 2003-13-04 currently requires you to inspect the
integral fuel tank wing ribs for cracks and the top and bottom wing
skins for distortion, repair any cracks or distortion before
further flight, and do a fuel tank ventilating system installation.
Since we issued AD 2003-13-04, the FAA determined the actionshould
also apply to all the models of the PC-6 airplanes listed in the
type certificate data sheet ofType Certificate (TC) No. 7A15 that
were produced in the United States through a licensing agreement
between Pilatus and Fairchild Republic Company (also identified as
Fairchild Industries, Fairchild Heli Porter, or Fairchild-Hiller
Corporation). In addition, the intent of theapplicability of AD
2003-13-04 was to apply to all the affected serial numbers of the
airplane models listed in TC No. 7A15. This AD retains all the
actions of AD 2003-13-04, adds those Fairchild Republic Company
airplanes to the applicability of this AD, and lists the individual
specific airplane models. We are issuing this AD to detect and
correct cracks in the ribs of the inboard integral fuel tanks in
the left and right wings, which could lead to wing failure during
flight with consequent loss of control of the airplane.
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