The second of three star fighters launched by the Oraki immediately after the war with the Word of Creation, the Wasp is a short-flight, non atmospheric fighter designed for heavy firepower and survivability.
Cramped crawl spaces, virtually all starships have them, and usually most players ignore them. Unless a nasty alien gets loose inside the ship, even many Gms don't give them a second thought..
Here are 30 other issues that could require some crawl space access and provide an interesting sub plot.
The player characters, experienced and somewhat well known, hear rumors and travelers' tales about a distant area being overrun by dragons (or other terrifying monstrosities). The locals have sent them a message, begging for heroic aid.
When they investigate, they discover that nothing of the sort is going on. It turns out that a group of thieves wanted them out of the way so that they could rob them (or someone who would normally receive their protection).