This Directive is prompted by numerous instances of false fire and overheat warnings that have resulted in engine in-flight shutdowns and aircraft diversions. This condition, if not corrected, could result in unnecessary engine in-flight shutdowns and aircraft diversions that unduly jeopardise continued safe operation of the aircraft.
Amendment 1 to this Directive was issued to reflect additional work required by Revision 2 of the Service Bulletin.
Amendment 2 is issued following release of Revision 3 of the Service Bulletin, which requires additional work for some aircraft.