Commonwealth legislation

AD/BEECH 90/58 - Wing Fatigue Life Limitation

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Commonwealth

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legislative instrument

Plain English Summary

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This airworthiness directive requires owners/operators of Beechcraft F90-series aeroplanes to retire the wing main spar and the wing centre‑section carry‑thru spar lower cap before those parts exceed 10,300 hours in service. It applies to all F90 models and obliges replacement planning and parts tracking by operators. The manufacturer may revise the life limit after further testing (Note 1), and only one spar replacement is permitted to extend lifetime once (Note 2), so operators must plan around that single permitted extension.

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AD/BEECH 90/58 - Wing Fatigue Life Limitation

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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 Beechcraft 90 and 65-90 (King Air) Series Aeroplanes

AD/BEECH 90/58 Wing Fatigue Life Limitation 3/81

Applicability: All model F90 Series.

Requirement: Retire the wing main spar and wing centre section carry-thru spar lower cap. Compliance: Before exceeding 10,300 hours in service.

Note 1: This life may be revised following the completion of further tests and analysis currently being carried out by the manufacturer.

Note 2: On the basis of currently available fatigue substantiating data only one spar replacement is permitted. This will allow a single lifetime extension from spar cap replacement.

Background: Analysis and test data supplied by the manufacturer has established the above retirement life for the wing spar.

Source text

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