Document ID: chunk:federal_register_of_legislation:F2006B06439:body:0
Version: federal_register_of_legislation:F2006B06439
Segment Type: other
Provision Reference: 
Character Range: 0–1078

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

 Robinson R22 Series Helicopters

AD/R22/34 Suspect Bolts  5/92 DM

            Applicability: Model R22 with serial numbers 1880 through 2060, and 2073. Also any R22 which has been overhauled or repaired by RHC since 9 July 1991 and all R22 regardless of serial number for which maintenance was performed since 9 July 1991 in the locations where the suspect bolts may have been used.

 Requirement: Action in accordance with Robinson SB No 69.

            Note: FAA Telex AD 92-06-17 refers.

            Compliance: Within 10 hours time in service after 26 March 1992 or by 9 April 1992, whichever occurs first.

            Background: A Robinson Helicopter experienced a failure of an NAS1304-16 AF bolt installed in the tail rotor controls of an R22 helicopter. Examination indicated the bolt failed due to hydrogen embrittlement which occurred during cadmium plating. In-flight failure of this bolt could be catastrophic.