COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F50 (F27 Mk 50) Series Aeroplanes AD/F50/72 Main Landing Gear Lock Link 3/97 DM Applicability: All serial numbers. Requirement: Unless already accomplished, action in accordance with Fokker SB F50-32-033. Note: Netherlands BLA nr: 1996-146(A) refers. Compliance: Within 7 days after 22 January 1997. This Airworthiness Directive becomes effective on 22 January 1997. Background: A MLG collapsed on roll out after landing. Investigation revealed that one of the two bolts that secure the downlock platform of the MLG locklink was missing. As a result of an AOT another operator reported broken lockwire and one of the affected bolts was loose. This unsafe condition if not corrected may result in further landing incidents.