Document ID: chunk:federal_register_of_legislation:F2006B02214:body:0
Version: federal_register_of_legislation:F2006B02214
Segment Type: other
Provision Reference: 
Character Range: 0–1129

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

 Ayres Thrush (Snow) Commander Series Aeroplanes

AD/AC-SNOW/23 Vertical Fin Rear Spar 10/95

            Applicability: All aircraft with model and serial number listed in Ayres Corporation Service Bulletin SB-AG-38.

            Requirement: Visually inspect the vertical fin rear spar for cracks at the upper, centre and lower rudder hinge bearing mounts.

            Compliance: Initially inspect before 100 hours' time in service after 14 September 1995. Re-inspect at intervals not to exceed 100 hours.

            Modification in accordance with Ayres Corporation Service Bulletin SB-AG-38 or a scheme accepted by the Authority cancels the Requirement of this Directive.

            Background: When installing the modification of Ayres Corporation Service Bulletin SB-AG-38 on one aircraft the vertical fin rear spar was found to be cracked in several locations.
            The cracks may be aggravated by internal corrosion of the bearings restricting free movement.