COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes AD/CESSNA 170/49 Right Hand (Co-Pilots) Control Wheel Yoke Guide 11/83 Applicability: All models 172 and R172 with S/Nos. 17266940 through 17275759; R1722000 through R1723454; F17201445 through F17202194; FR17200591 through FR17200675. All models 172 with S/Nos. 17275760 through 17275762, 17275764, 17275765, 17275769, 17275770, 17275788, 17275792, 17275793, 17275796, 17275798, 17275800 through 17275803, 17275806 and 17275818. Requirement: Action in accordance with Cessna S.I.L. SE82-38 and Cessna S.I.L. SE82-38 Rev 1. Note: FAA AD 83-10-03 refers. Compliance: Unless already accomplished, within 100 hours time in service after 30 November 1983. Background: The possibility exists for the control wheel guide roller to become dislodged and restrict control if the R/H control wheel is rapidly forced against the down stop limit.