The NTSB Aircraft Accident Report for Aloha Airlines Flight 243 states that a passenger boarding the aircraft noticed a crack in the fuselage but did not mention it to the airline staff. During the short flight from Hilo to Honolulu, the aircraft suffered explosive decompression resulting in a huge section of aircraft's skin being torn away. After seeing pictures of the damaged aircraft, I'm amazed that the flight crew was able to maintain control of the aircraft and guide it to an emergency landing in Kahului.

After reading about the accident, I always take a quick look around the fuselage as I'm boarding.