Leak

A leak occurs when something escapes from a structure designed to contain it.

Plasma leak

 * A faked plasma leak.
 * Enterprise had a plasma leak caused by the unidentified aliens in 2151.
 * In 2368, a plasma leak aboard the USS Enterprise (NCC-1701-D) caused a warp core breach after a collision with the USS Bozeman.
 * A Skrreean starship suffered a plasma leak in its engine core in 2370.
 * Deep Space 9's Lower Pylon One suffered a leak in 2370.
 * A leak in a plasma injector caused a runabout to cross over into the mirror universe.
 * In 2372, an attempt at creating an artificial wormhole caused significant damage to the USS Defiant (2370), including a plasma leak in the engine room. )
 * The suffered a plasma leak on deck five in 2374, after the primary plasma injector was damaged in a Jem'Hadar attack.
 * In 2376, Harry Kim was fixing a plasma leak on deck five when he began having a panic attack.

Coolant leak

 * In 2153, a coolant leak was part of a simulated shuttle flight.
 * Shuttlepod 2 leaked plasma coolant when its thrusters were damaged after it grazed a rock face.
 * In 2266, the toxic fumes from a coolant leak in the phaser system killed USS Enterprise (NCC-1701) crewman Robert Tomlinson during an engagement with a Romulan Bird-of-Prey.
 * A coolant leak was caused by collision with a quantum filament.
 * A coolant leak occurred during an alternate timeline battle with Klingons.
 * In 2371, a coolant leak caused by battle damage led to the warp core breach that destroyed the USS Enterprise-D for the final time.

Radiation leak

 * In 2366, radiation that had leaked from Doctor Nel Apgars station in orbit of Tanuga IV threatened the USS Enterprise-D's antimatter pod. If the radiation had surged in or near them, it would have destroyed the ship.
 * In 2367, the USS Enterprise-D discovered a small Talarian observation craft adrift in Sector 21947. The craft had developed a serious radiation leak in its propulsion system.
 * In 2367, a massive radiation leak from a waste barge threatened to exterminate all life on Gamelan V.
 * In 2370, a high-energy radiation leak was ignited by phaser fire, destroying a Skrreean ship.
 * A radiation leak from a loose plasma coil on an Antares-class transport prevented the beam-off of an injured Vedek Bareil Antos.
 * An antimatter radiation leak from Earth probe Friendship 1 caused radiation sickness to occur on a planet in the Delta Quadrant.
 * Malon waste export vessels could jettison their Theta storage tanks if a radiation leak occurred.

Other leaks

 * A small gas leak.
 * A chlorinide leak.
 * A beer leak occurred when the glass holding it was contaminated with invidium.
 * A thorium leak.
 * Tamal became concerned about a neutrino leak in the port nacelle when Thomas Riker and the Maquis stole the USS Defiant (2370).
 * A fuel converter leaking veridium isotopes could cause a warp core breach.
 * In 21st century Earth slang, to "take a leak" means to urinate.
 * A fuel converter leaking veridium isotopes could cause a warp core breach.
 * In 21st century Earth slang, to "take a leak" means to urinate.