COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 400 Series Aeroplanes AD/BEECH 400/2 MLG Door Uplock Links 4/93 Applicability: Model 400A series with serial numbers RK-1 through RK-32. Model 400T series with serial numbers TT-1 through TT-6. Requirement: Replace the existing link assembly from the uplock mechanism of the main landing gear door with an improved link assembly, in accordance with Beechcraft Service Bulletin 2447. Note: FAA AD 93-01-07 Amdt 39-8461 refers. Compliance: Within 100 hours time in service after 1 April 1993. Background: An investigation conducted by the manufacturer has revealed that the uplock links installed on certain aircraft were undersized. The actions specified by this Directive are intended to prevent snagging of the end clevis fitting and kinking (and subsequent failure) of the emergency release cable of the main landing gear.