Lower landing legs.
4 seconds sound clip from the Santa Claus Conquers the Martians (1964) movie soundboard.
You can hear this line at 00:51:08 in the Blu-ray version of the movie.
Quote context
[...]
- Well, you're talking to Santa Claus, son.
- Well, well now, you wouldn't want me to tell my secret, would you?
- Oh... oh, oh, poor man. He's fainted, just like someone who's seen a ghost.
- We've landed. Hatch open. Ladder down. Power off. Ship secured.
- All right, on your feet, come on.
[...]