AD/R22/49 - Main Rotor Drive Shaft Yoke Half Assembly (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Robinson R22 Series Helicopters

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AD/R22/49 Main Rotor Drive Shaft Yoke Half Assembly 12/2000 TX

Applicability: Model R22 helicopters, with a yoke half assembly part number A203-5 installed. Requirement: 1. Inspect each yoke for evidence of cracking, refer to Figure A. If a yoke is cracked, before further flight, replace the yokes with serviceable yokes, part number A203-7. Both yokes must be replaced with yokes part number A203- 7.

2. Determine the Lot identifier of each yoke, P/N A203-5.

If the Lot identifier is from 24 through 43, if it is in letter code, or if it is illegible, replace yokes part number A203-5, with serviceable yokes part number A203-7. Yoke part number A203-7 cannot be installed with yoke part number A203-5.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Note: Emergency FAA AD 2000-20-51 and Robinson R22 Service Bulletin SB-88A refer.