Why doesn't the FAA usually implement the changes the NTSB raises after learning from crashes?
They do when appropriate after considering all concerns. The NTSB is solely concerned with safety. The best rulemaking is not literally safety-first or nothing would actually get done.
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They do when appropriate after considering all concerns. The NTSB is solely concerned with safety. The best rulemaking is not literally safety-first or nothing would actually get done.