Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed 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 MCAI describes the unsafe condition as:
Bombardier Aerospace has completed a system safety review of the CL-600-2C10/CL-600-SD24 aircraft fuel system against the new fuel tank safety standards. * * * The assessment showed that a single failure due to chafing of fuel system wiring with high power wiring at the centre fuel tank front spar could result in overheating of the fuel boost pump. The assessment also showed that chafing of the high power wiring with the centre fuel tank front spar structures could result in overheating of the fuel tank wall. Overheating of the fuel tank wall could lead to hot surface ignition resulting in a fuel tank explosion.
The proposed AD wouldrequire actions that are intended to address the unsafe condition described in the MCAI.