AD NUMBER: 2009-06-05
MANUFACTURER: Bombardier
SUBJECT: Airworthiness Directive 2009-06-05
SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAIdescribes the unsafe condition as: [S]everal cases of wing anti-ice piccolo duct failure reported on CL-600-2B19 (CRJ) aircraft. Although there have been no failures reported on Challenger aircraft,similar ducts are installed on the above Challenger models. * * * * * Cracking of the wing anti-ice piccolo ducts could result in air leakage, with an adverse effect on the anti-ice air distribution pattern and a possible unannunciated insufficient heat condition. * * * The unsafe condition is anti-ice system air leakage with a possible adverse effect on the anti-ice air distribution pattern and anti-ice capability without annunciation to the flight crew, and consequent reduced controllability of the airplane. We are issuing this AD to require actions to correct the unsafe condition on these products.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/