AD NUMBER: 2006-09-08
SUBJECT: Airworthiness Directive 2006-09-08 SUMMARY: The FAA is
adopting a new airworthiness directive (AD) for certain Bombardier
Model CL-600-2B19 (Regional Jet Series 100 & 440)
This AD requires modifying the wiring on an alternating current
(AC) service bus contactor that is located in the avionics bay.
This AD results from incidents of short circuit failures of certain
AC contactors located in the avionics bay.
We are issuing this AD to prevent short circuit failures of
certain AC contactors, which could result in arcing and consequent
smoke or fire.