Document ID: chunk:federal_register_of_legislation:F2009L03644:body:0:p2
Version: federal_register_of_legislation:F2009L03644
Segment Type: other
Provision Reference: 
Character Range: 2825–4632

in service.

                  2. b. Initially, upon accumulating 5,000 hours time in service or within the next
                  10 hours time in service after 30 July 2009, or within the next 100 hours time in service from the last inspection performed, whichever occurs later.  Repetitively thereafter at intervals not to exceed 100 hours time in service.

                  The compliance times remain unchanged by this issue of the Directive.
             This Amendment becomes effective on 22 October 2009.
Background:  The FAA received reports of cracked engine mounts.  Such cracking, unless detected and corrected, could result in failure of the engine mount and possible separation of the engine from the aircraft.

             Amendment 1 was prompted by reports received by the FAA of two Model AT-802A aircraft with cracked engine mounts below the initial compliance time.  The FAA determined that the initial inspection is required when the aircraft reaches a total of 1,300 hours time in service.

             Amendment 2 retained the inspection actions of FAA AD 2007-13-17 and required incorporation of engine mount gussets as a mandatory terminating action for the repetitive inspection requirement.

             Amendment 3 was prompted by a report of a Model AT-602 aircraft with a crack completely through the gusset that was installed as required in FAA AD 2008-10-12.  Consequently, this Directive requires repetitive inspections of engine mounts of all previously affected aircraft with or without gussets installed.

             Amendment 4 is issued to correct minor typographical errors in Compliance section paragraphs 1.b. and 2.b.  There is no change to the technical requirements.

David Villiers
Delegate of the Civil Aviation Safety Authority

4 September 2009