COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 150, F150, 152 & F152 Series Aeroplanes AD/CESSNA 150/39 Rudder Pedal Torque Tube 4/84 Applicability: All models listed in Cessna Service Information Letter SE83-31 which have not been modified in accordance with that document. Requirement: Visually inspect the rudder pedal torque tubes for cracking in the vicinity of the welded joints between the torque tube and the pedal arm spigots. Compliance: Prior to issue of the next Maintenance Release after 30 April 1984, and thereafter at each issue of a new Maintenance Release. Background: Several failures of rudder pedal torque tubes have occurred in Cessna 150 series aircraft causing loss of rudder and braking control.