Category B rotorcraft are defined as:

Category B rotorcraft are defined as:

• A. Single-engine or multiengine rotorcraft that fully meet all Category A standards.
• B. Single-engine or multiengine rotorcraft that do not fully meet all Category A standards; no guaranteed stay-up after engine failure.
• C. Rotorcraft designed for hover-only operation.
• D. Rotorcraft equipped with two or more engines.

Answer: (B)

The main idea is how rotorcraft are classified by engine-out performance. Category A describes rotorcraft that meet the required standards to guarantee staying airborne after an engine failure during takeoff or hover, ensuring a safe flight path to a landing. Category B, then, refers to rotorcraft that do not meet all of those Category A standards, so there is no guaranteed stay-up after engine failure. So the best description is rotorcraft that do not fully meet all Category A standards and have no guaranteed stay-up after an engine failure. The other options aren’t correct because meeting Category A standards would place the aircraft in Category A, hover-only design isn’t how the categories are defined, and the number of engines doesn’t alone determine the category.

The main idea is how rotorcraft are classified by engine-out performance. Category A describes rotorcraft that meet the required standards to guarantee staying airborne after an engine failure during takeoff or hover, ensuring a safe flight path to a landing. Category B, then, refers to rotorcraft that do not meet all of those Category A standards, so there is no guaranteed stay-up after engine failure.

So the best description is rotorcraft that do not fully meet all Category A standards and have no guaranteed stay-up after an engine failure. The other options aren’t correct because meeting Category A standards would place the aircraft in Category A, hover-only design isn’t how the categories are defined, and the number of engines doesn’t alone determine the category.