Airworthiness Directives; Bombardier, Inc., Airplanes

We are revising an earlier proposal for certain Bombardier, Inc., Model DHC-8-401 and -402 airplanes. This action revises the notice of proposed rulemaking (NPRM) by adding certain airplanes to the applicability and adding specified actions. We are proposing this airworthiness directive (AD) to address the unsafe condition on these products. Since these changes increase the scope of the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.