Working on my dad's Spectrum this morning and was swapping some pedals out. I noticed an irregularity on the left side crank arm at the bolt hole and started investigating a little further. His slow speed crash last week due to inattention may have been a good thing - this looks like it could be seriously catastrophic. Cracks on both sides all the way through. Who knows how long they've been there.
Too bad - these are really cool Sampson lightweight cranks from the mid to late 90's. Guess I'll be on the look out for a lightweight 130bcd square taper crankset