Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier Model CL600-1A11 (CL-600), Model CL-600-2A12 (CL-601), and Model CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series airplanes. This proposed AD would require operators to assign serial numbers or part numbers to certain landing gear parts; and to establish the number of landings on the parts, if necessary. This proposed AD also would require operators to revise the Airworthiness Limitations section of the Instructions for Continued Airworthiness to reflect the new life limits of the landing gear parts. This proposed AD is prompted by reports that landing gear parts that have safe-life limits but do not have serial numbers or part numbers can be removed from one landing gear and re-installed on another, making tracking difficult. We are proposing this AD to prevent life-limited landing gear parts from being used beyond their safe-life limits, which could lead to collapse of the landing gear.