Atlas/ Glossary/ Category B, with respect to transport category rotorcraft,
General
Category B, with respect to transport category rotorcraft,.
Category B, with respect to transport category rotorcraft,
single-engine or multiengine rotorcraft which do not fully meet all Category A standards. Category B rotorcraft have no guaranteed stay-up ability in the event of engine failure and unscheduled landing is assumed.
Source
14 CFR § 1.1 →