Document ID: chunk:federal_register_of_legislation:F2007L01096:body:0:p3
Version: federal_register_of_legislation:F2007L01096
Segment Type: other
Provision Reference: 
Character Range: 6058–7980

or 3,600 landings, whichever occurs first.  Inspect thereafter at intervals not to exceed 600 flight hours or 250 landings, whichever occurs first.

                2.a. Before further flight.  Repeat the inspections before accumulating 4,500 flight hours or 4,500 landings, whichever occurs first, from the first inspections.  Inspect thereafter at intervals not to exceed 4,500 flight hours or 4,500 landings, whichever occurs first.

                2.b. Within 200 flight hours or 100 landings after 23 April 2007, whichever occurs first.  Repeat the inspections before reaching a threshold of 15,000 flight hours or 15,000 landings, whichever occurs first.  Inspect thereafter at intervals not to exceed 4,500 flight cycles or 4,500 landings, whichever occurs first.
             This Amendment becomes effective on 23 April 2007.
Background:  Initial investigation of a recent C-212 Maritime Patrol aircraft accident has revealed cracks in the centre wing lower skin at STA Y=1030.  The aircraft had accumulated 17,000 flight hours and 7,300 flight cycles.  Fatigue cracking is suspected to be the cause.

             The suspect element is identified in document C-212-PV-02-SID as a Principal Structural Element with No. 57.212.06 and an inspection threshold of 20,000 landings.

   Spain AD 02/88 Revision 3 (AD/CASA/1 Amdt 5) remains valid and relevant inspections have to be performed in addition to the requirements of this Directive.

   Undetected fatigue cracking could lead to reduced structural integrity of the aircraft.

   Amendment 1 required a revised inspection procedure and the inclusion of aircraft not previously affected.

   Amendment 2 is issued in response to a new EASA AD, which introduces a High Frequency Eddy Current procedure, as an additional inspection to detect cracks with higher reliability.

David Villiers
Delegate of the Civil Aviation Safety Authority

19 April 2007