Document ID: chunk:federal_register_of_legislation:F2006B04662:body:0
Version: federal_register_of_legislation:F2006B04662
Segment Type: other
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

 Bell Helicopter Textron 412 Series Helicopters

 AD/BELL 412/27 Tailboom Upper Longeron 12/90

DM

 Applicability: Model 412 with serial numbers:

            33001 through 33211

            34001 through 34013

            36001 through 36013

 Requirement: 1. Action in accordance with Part 1 of Bell Alert Service Bulletin No 412-90-49.

 2. Action in accordance with Part II of Bell Alert Service Bulletin No 412-90-49. Compliance:              1. Prior to 30 November 1990.
             2. At intervals not exceeding 300 hours time in service after incorporation of Requirement 1.

            Background:  Incidents of cracked longeron splices have created a requirement for additional access to inspect upper longeron splices, and modification action to increase structural integrity.