AD/DHC-6/58 - Wing Struts Internal Beam Corrosion

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

DHC-6 (Twin Otter) Series Aeroplanes

AD/DHC-6/58 Wing Struts Internal Beam Corrosion 9/85

All models.

Action in accordance with De Havilland Aircraft of Canada Service Bulletin No.

6/474.

As per “Requirement” Document.

The manufacturer reports two struts on the same aircraft displaying exfoliation corrosion in the strut beam flanges enclosed by the strut skins.