You say a survival story...
trying to get off the planet implies that there is someway to do that. This would also imply that the reason the ship crashed is reversible, so how and why did it crash? (I am just trying to show you my train of thought when I build a story)
Several options off the top of my head...
-Electro-magnetic field that caused the ship's instruments to malfunction. Fixing it may require destroying the field or discovering what it is so that the instruments can be recalibrated.
-Damage from anything. Could be natural (meteor shower, solar wind, gravity wells, etc.) to synthetic (sabotage, attack, mistaken identity as a military vessel in protected space, etc.). To "fix" this is obvious as the ship will not be ready to fly until fixed, but the cause of the crash must be dealt with. In the natural case, time may be the answer. The synthetic is more difficult to deal with as it doesn't just go away. Perhaps they need to find a working radio to call in someone to eliminate the pirate outpost and pick them up.
-Miscalculation of flight time led to lack of resources necessary to reach the destination. In short, we ran out of fuel...
-The crash was on purpose. The ship was actually programmed to crash land on the planet for some reason (escape pod, experiment and we are the subjects, exile, etc.).
Hope this helps!