Fri, Aug 27, 2004
AD/PC-12/43 Crew Seats Bucket Assembly Tubes 11/2004 DM
Applicability:
All Model PC-12 and PC-12/45 aircraft, equipped with Israel
Aircraft Industries Ltd. pilot seats, Pilatus part numbers
9593001111, 9593001121, 9593001131, and 9593001133, and co-pilot
seats Pilatus part numbers 9593001112, 9593001122, 9593001132, and
9593001134; which have accumulated 6,000 hours or more time in
service as at the effective date of this Directive.
Requirement: Perform a fluorescent
dye-penetrant inspection to detect cracks at the grooved area of
the left hand and right hand bucket assembly tubes of the pilot and
co-pilot seats, in accordance with Pilatus PC-12 Service Bulletin
No. 25-031, dated 21 July 2004, or later revision approved by
FOCA.
Report the inspection findings to Pilatus Aircraft Ltd. If
during the inspection cracks are detected, before further flight,
replace the affected bucket assembly. Contact Pilatus Aircraft Ltd.
for a replacement repair procedure.
Note:
Switzerland FOCA AD HB-2004-329 refers.
Compliance: Within 2 calendar weeks after 1
September 2004. This Airworthiness Directive becomes effective on 1
September 2004.
Background: A report was received of the
failure of a crew seat’s bucket assembly tubes, which was
detected during a maintenance inspection. Investigation revealed
the tubes failed at the location of the energy device pins. The
lower tubes remained attached, but the upper parts were completely
disconnected. This could lead to reduced ability of the pilots to
control the aircraft.
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