The phrase "airlock open" is correct and usable in written English.
It can be used in contexts related to space travel, science fiction, or any situation involving controlled environments where an airlock is present.
Example: "The crew received the signal that the airlock open, allowing them to proceed with their spacewalk."
Alternatives: "airlock is ajar" or "airlock is unlocked".
When the airlock opened and the green light was on, turned the holder slowly clockwise about 30° until stopped, made sure to hold it firmly so that it was sucked in slowly by vacuum.
The pair will enter an airlock before opening its hatch and heading outside.
She puts on a spacesuit and opens the shuttle's airlock, causing explosive decompression which forces the Alien into the shuttle's open doorway.
The Engineer forces open the lifeboat's airlock and attacks Shaw, who releases her alien offspring onto the Engineer; it thrusts an ovipositor down the Engineer's throat, subduing him.
They opened the spaceship's airlock door fantastically well.
Go, go, go!" so I stepped into the airlock, closed the hatch, depressurised it, opened it – and away I went.
Engineers later said a valve in the suit, possibly activated by a power surge in the airlock where it was stored, had opened when it should not have and released part of the nine pounds of water stored in a suit tank.
Having to let go of Poole, Bowman manually opens the ship's emergency airlock and enters the ship risking death from exposure to vacuum but survives.
If there is an airlock or gowning room on the way in, open only one door at a time.
This would yield us at least four U.S. companies capable of flying NASA astronauts into space within three years and create a new American frontier in low Earth orbit with multiple space stations opening their airlocks for business and science, even as China struggles to loft its first small space station module.
