In the space of a few years, USAir lost five planes:
Pittsburg, 737, jet upset
LA, 737, collision on landing
LaGuardia, 737, pilot error
Charlotte, DC9, mishandling in windshear
LaGuardia, F28, ice
All were serious fatal accidents (except the LaGuardia 737, where the death toll was luckily only two, all of these accidents killed between 50 and 130 people each).
This is a streak completely unrivalled by any other Western airline, yet they always seemed safe and I flew them a lot. I really liked their service and thought their engineering ops (as much as I could tell from a passenger's eye view) were extremely good and the planes were well-maintained and always spotlessly clean. Never left a minute late on any of about 20 flights (including 4 trans-Atlantic) with them, and never felt at all unsafe with them. They didn't pick up an undue number of FAA fines a la Eastern (whose actual safety record was near-perfect) either, so why all these terrible crashes? Just bad luck?
fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz