You mean like this?
U.S. Sailors from the aviation intermediate maintenance department jet shop performs a jet engine test cell on an F/A-18 Super Hornet jet engine on the fantail aboard the aircraft carrier USS Dwight D. Eisenhower (CVN 69) in the Atlantic Ocean, April 14, 2019.
IKE is underway conducting flight deck certification during the basic phase of the Optimized Fleet Response Plan (OFRP). (U.S. Navy photo by Mass Communication Specialist 3rd Class Andrew Waters)
ALL US Navy carriers have a Jet Shop on the fantail to repair jet engines as necessary..jet engines do break..