COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
DHC-2 (Beaver) Series Aeroplanes
AD/DHC-2/16 Aileron Centre Hinge Bracket - Inspection 2/71
Applicability: All models with brackets P/N 02-B-58 and P/N 02-B-58-1.
Requirement: Remove the mass balance assembly from the stub tube of each centre hinge bracket and visually inspect the elliptical tube using a 4X magnifying glass for cracks in the weld areas at the connection to the torque tube and around the extremities of welded bushes.
Compliance: For components with less than 400 hours total time in service as at 31 March 1971 - at or before achieving 500 hours total time in service; or
For components with more than 400 hours total time in service as at 31 March 1971 - within 100 hours time in service after 31 March 1971; and
Thereafter at intervals not exceeding 100 hours time in service.