1AD/PC-6/38 - Horizontal Stabiliser Inspection

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Pilatus Porter PC-6 Series Aeroplanes

AD/PC-6/38 Horizontal Stabiliser Inspection 7/93

Applicability: All Pilatus Porter PC-6 series aircraft. Requirement: Retire the horizontal stabiliser; or

Modify the horizontal stabiliser and inspect for cracks in accordance with a scheme approved by the Authority.

Note: Aeronautical Designs Australia Pty Ltd EO-934 is an approved scheme for the purpose of this Directive.

Compliance: Retire before 10000 hours component time in service; or

Modify and inspect before 10000 hours component time in service. Re-inspect at intervals not exceeding 100 hours.

Background: The Pilatus Porter horizontal stabiliser has a history of fatigue cracking in service.

Inspection access to some cracking sites is very restricted.

This AD gives two options: retire before cracks are likely to start; or improve access and inspect.