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Notice of proposed rulemaking (NPRM).

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-2A12 airplanes. This proposed AD was prompted by a report that certain environmental control system (ECS) pre-cooler clamp assemblies may not conform to specifications. This proposed AD would require an inspection of the pre-cooler clamps and replacement of non-conforming pre-cooler clamps. The FAA is proposing this AD to address the unsafe condition on these products.

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