Airworthiness Directives; Bombardier, Inc. Airplanes

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes. This proposed AD was prompted by reports of cracked forward door members of the inboard main landing gear (MLG) doors. This proposed AD would require repetitive inspections of the inboard MLG doors, repairs if necessary, and replacement of the inboard MLG doors. This proposed AD also would provide optional terminating action for the door replacement. We are proposing this AD to prevent loss of an MLG door during flight, which could result in damage to the airplane.