Commonwealth legislation

AD/CESSNA 400/77 - Aft Auxiliary Wing Spar Attachment - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

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This Airworthiness Directive is a safety order requiring a specific mechanical fix on certain Cessna aircraft before they can legally fly in Australia.

Who it affects: Owners and operators of Cessna 421C aircraft with serial numbers 421C0801 through 421C0886.

What you must do: Before the aircraft can be issued an Australian Certificate of Airworthiness (the official document allowing it to fly), you must replace specific fasteners (screws and locking collars) where the rear auxiliary wing spar connects to the stub wing. The old parts must be replaced with NAS517-3-5 screws and HL70-6 Hylok collars.

Why it matters: The manufacturer identified that the original fasteners could fail, potentially causing structural problems with the wing attachment. This modification prevents a safety hazard that could endanger the aircraft in flight.

Compliance deadline: This must be completed before the aircraft receives its Certificate of Airworthiness.

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AD/CESSNA 400/77 - Aft Auxiliary Wing Spar Attachment - Modification

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Cessna 400 Series Aeroplanes

AD/CESSNA 400/77 Aft Auxiliary Wing Spar Attachment - Modification

Applicability: All model 421C with S/Nos. 421C0801 to 421C0886. Document: Cessna Multi-Engine Customer Care SIL ME80-38. Compliance: Before issue of Australian Certificate of Airworthiness.

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Background: The manufacturer advises that fasteners used in the attachment of the Aft Auxiliary Wing Spar Caps to the stub wing require replacement with NAS517-3-5 Screws and HL70-6 Hylok collars.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.