Document ID: chunk:federal_register_of_legislation:F2006L01065:body:0:p2
Version: federal_register_of_legislation:F2006L01065
Segment Type: other
Provision Reference: 
Character Range: 2825–4154

For Requirement 1:

             For Castings with 4,500 or more hours time in service; within 250 hours time in service after 11 May 2006, and thereafter at intervals not to exceed 250 hours time in service.

             For Castings with less than 4,500 hours time in service; before the accumulation of 4,750 hours time in service, and thereafter at intervals not to exceed 250 hours time in service.

                2. Before further flight; except that the aircraft may be flown at a cabin pressure differential of zero p.s.i. to a base where the replacement can be accomplished.

                3. Within 250 hours time in service after detection of the initial cracking; with operating restrictions Requirements 3.a. and 3.b. in place until replacement.

             Note:  Operators who do not have records of hours time in service of individual Castings, shall substitute aircraft hours time in service in lieu.
             This Airworthiness Directive becomes effective on 11 May 2006.
Background:  The FAA received numerous reports of cracks in the Pilot and Co-pilot Direct Vision Window Frame Castings.  Such cracking affects the structural integrity of the Casting, and in some cases has caused loss of cabin pressurisation.

David Villiers
Delegate of the Civil Aviation Safety Authority

31 March 2006