Document ID: chunk:federal_register_of_legislation:F2008L02506:body:0:p3
Version: federal_register_of_legislation:F2008L02506
Segment Type: other
Provision Reference: 
Character Range: 5427–6754

at the 45° configuration, except for emergency situations, and mandated the installation of a mechanical stop along with new markings through ATR modification (Mod) 01192 (ATR Service Bulletin (SB) ATR 42-27-0008).  However the DGAC AD let the possibility for some operators to request an operational exemption, based on the aircraft operating network, granted by their National Aviation Authority.  For these specific cases, the mechanical stop could be removed and the markings modified, in accordance with Mod 01314 (SB ATR42-27-0080).

             These days, with second-hand aircraft movements worldwide, it is likely that some aircraft which were previously granted with an operational exemption can be currently operated without the flaps 45° limitation in geographic locations where the use of the 45° configuration may represent an unsafe condition.

             This AD mandates AFM TR No.51 of the AFM with modification of the aircraft so as to restrict the maximum flaps extension to 30°.  These actions are intended to prevent an uncontrollable nose pitch-down at low altitude resulting from a tail plane stall caused by ice accretions on tail surfaces in conjunction with full flaps down at 45° and the aircraft at approach speeds.

James Coyne
Delegate of the Civil Aviation Safety Authority

10 July 2008