Mishap Classification Changes and Other NPR Revisions Mean Fewer Type B Mishaps and Better Investigations Policy Byte September 12, 2014 Gerry Schumann explains the four major changes to NPR 8621.1B for Mishap and Close Call Reporting, Investigating and Record-keeping and what they mean for you. More Videos Feature Videos Learn about the Office of Safety and Mission Assurance, its disciplines and programs, and much more in these feature videos. Safety Messages Guest speakers deliver the monthly Safety Messages in these live recordings. Knowledge Bytes These short videos provide expert insight on various safety and mission assurance topics. Policy Bytes Policy owners explain recent changes to policies and standards in these short videos. Event Videos Video captures of live events on Safety and Mission Assurance topics.