Commonwealth legislation

AD/VAT/37 - Wing Ribs - Inspection and Modification

In ForceCTH

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This directive requires owners/operators of Victa and A.E.S.L. Airtourer aeroplanes (unless already modified per AESL SB No.019) to remove the walkway top skin to inspect three specific wing ribs for cracks around the lower flange-to-web radius near the landing-gear attachments, and to repair any defects per SB No.019 or a Secretary‑approved alternative before flight.

Inspections follow an initial timing tied to aircraft hours and recur every 3,500 hours; owners/operators bear inspection and repair costs, creating downtime and an incentive to adopt SB No.019.

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Current sections

Direct links to the current provisions in AD/VAT/37 - Wing Ribs - Inspection and Modification.

AD/VAT/37 - Wing Ribs - Inspection and Modification

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Victa and A.E.S.L. Airtourer Series Aeroplanes

AD/VAT/37 Wing Ribs - Inspection and Modification 6/72

Applicability: All models not modified to AESL SB No. 019.

Requirement: Remove the walkway top skin sufficiently for wing ribs P/Nos. 10217/1 and /2 and 102109/1 to be inspected for cracks. Particular attention should be paid to the lower flange to web radius in the vicinity of the attachment points for the landing gear legs.

Prior to further flight defective ribs shall be repaired in accordance with AESL SB No. 019 or to a scheme approved by the Secretary.

Compliance: For aircraft which have exceeded 3500 hours time in service as at 30 June 1972 - within 300 hours time in service and thereafter at intervals not exceeding 3500 hours time in service.

For aircraft which have not exceeded 3500 hours time in service at 30 June 1972 - before achieving 3800 hours time in service and thereafter at intervals not exceeding 3500 hours time in service.

Source text

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

1 AD/VAT/37 - Wing Ribs - Inspection and Modification