Definition
Emergency flotation devices fitted to certain helicopters operating over water. The floats are stowed in a deflated, packed condition along the skids or fuselage and are inflated rapidly by a compressed gas system when the pilot activates them, allowing the helicopter to remain afloat after a forced landing on water.
Plain English
Tightly folded inflatable bags attached to a helicopter that the pilot can blow up quickly with high-pressure gas, so the helicopter floats if it has to land on water.
Context Anchor
Seen in aircraft emergency equipment descriptions, especially for helicopters or other aircraft operated over water.
Derivation
Called pop-out because the floats burst out of their stowed covers and inflate suddenly when the gas system fires, much like an automotive airbag deploys.
Why Pilots Care
Deployment gives the crew and passengers time to evacuate before the helicopter submerges, directly affecting survival rates in water landings.
Analogy
They are like a life jacket packed flat until needed. It is not useful while packed away, but once released and filled with air, it helps keep something on the surface of the water.
Intuition Check
Do not assume “pop-out” means the floats always come out automatically. Some systems require pilot action, and the aircraft manual gives the correct procedure for that aircraft.
Example Sentence 1
Before crossing the bay, the pilot armed the pop-out floats so they could be inflated instantly if the engine failed over water.
Example Sentence 2
After the engine failure the pilot selected the emergency switch and the pop-out floats inflated on contact with the sea.