AD NUMBER: 2004-09-37
MANUFACTURER: Bombardier
SUBJECT: Airworthiness Directive 2004-09-37
SUMMARY: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Bombardier transport category airplanes, that currently requires a detailed inspection to detect cracks of the vane brackets of the inboard flap actuator beam, and follow-on repetitive detailed inspections or corrective actions, as applicable. That AD also provides for two optional terminating actions for the detailed inspection(s). This action requires performing one or the otherof the terminating actions. The actions specified by this AD are intended to detect and correct gaps between the flap vane bracket and the adjacent lower skin and between the flap vanebracket and vane actuator beam, and premature cracking of the flap vane brackets, which couldresult in failure of the flap vane bracket(s) when the flaps are extended and the flap vane is aerodynamically loaded, and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

FMI: http://www.avantext.com/DailyADIndex.ASP?AD=20040937