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