I've written about this before!
Am afraid this story really annoys the hell out of me, especially it being called a classic, I wish it would just go away, the first time I read it years and years ago it upset me, it got under my skin and didn't leave for a long time!
Now I am much older, much more cynical, no wiser but a hell of a lot grumpier, this story just plain p****s me off, it is so badly flawed throughout!
The design of the living quarters/cockpit, the practice of putting just enough fuel for one approach and no more with everything weighed to the nearest pound, which is very, very bad engineering practice and just asking for trouble, plus the behavior of the pilot knowing there have been stowaways in the past, and why is there a heat sensor in the closet???
If on getting to the planet only to find the landing delayed because of bad weather, he would not have enough fuel to go into orbit and then land when things are clear, thus he would be up a well known creek without a paddle, which is why it is very bad practice never to have spare fuel!
If stowaways have been a problem in the past then why doesn't the pilot take all of five seconds to open the closet door to check if anyone is there before even sitting to do the pre-flight checks, this should be standard practice!
Basically it's a poorly thought out story, no classic, which relays way too, too much on its shock value/horrific ending, as it doesn't have much else going for it!!!!!