AD NUMBER: 1968-17-03R1
MANUFACTURER: Pilatus
SUBJECT: Airworthiness Directive 68-17-03R1 SUMMARY: We are adopting a
new airworthiness directive (AD) to revise AD 68-17-03, which
applies to all Pilatus Aircraft Ltd. (Pilatus) PC-6 series
airplanes. AD 68-17-03 requires you to repetitively inspect the
rudder end rib for cracks and replace the rudder end rib with a
modified rudder end rib when you find cracks. Installing the
modified rudder end rib terminates the repetitive inspection
requirements of AD 68-17-03. Under a licensing agreement with
Pilatus, Fairchild Republic Company (also identified as Fairchild
Industries, Fairchild Heli Porter, or Fairchild-Hiller Corporation)
produced Model PC-6 series airplanes (manufacturer serial numbers
2001 through2092) in the United States. AD 68-17-03 was intended to
apply to all affected serial numbers of Model PC-6 series airplanes
listed on Type Certificate Data Sheet (TCDS) No. 7A15, includingthe
Fairchild-produced airplanes. Consequently, this AD clarifies that
all models of the PC-6 airplane on TCDS No. 7A15 (including those
models produced under the licensing agreement by Fairchild Republic
Company) are included in the applicability. We are issuing this AD
to detect and correct cracks in the rudder end rib, which could
result in failure of the rudder end rib. This failure could result
in loss of rudder control.
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