Document ID: chunk:federal_register_of_legislation:F2008L02100:body:0:p2
Version: federal_register_of_legislation:F2008L02100
Segment Type: other
Provision Reference: 
Character Range: 2781–3687

The potential therefore exists for a hazardous condition in which both engines on the same helicopter are simultaneously affected.
   The original issue of this Directive required a hardware modification to the ECU that allows recovery from the 65% backup mode if the loss of N2 speed signals is determined to be temporary.  The modification applies to the Selector-Comparator board in the ECU.
   This Amendment limits the applicability to civil helicopters and continues the requirement for ECU Selector-Comparator board to be modified, extending the compliance until 30 November 2009 for both engines.  The Amendment also requires that at least one engine of each helicopter has a modified ECU Selector-Comparator board installed after 30 November 2008.
   The original issue of this Directive became effective on 5 July 2007.

James Coyne
Delegate of the Civil Aviation Safety Authority

13 June 2008