When did Bruce McCandless use a jet pack?

Bruce McCandless used a jet pack during the STS-41B Space Shuttle mission on February 7, 1984. He became the first astronaut to fly untethered in space using the Manned Maneuvering Unit (MMU), allowing him to maneuver freely outside the shuttle. This groundbreaking event showcased the potential for astronauts to conduct spacewalks without being tethered to the spacecraft.