| Date: | March 27, 1977 |
| Location: | Tenerife, Canary Islands |
| Aircraft: | Boeing B-747-121 / Boeing B-747-206B |
| Reg: | N736PA/PH-BUF |
| Airline: | Pan American World Airways / KLM |
| Flight No: | 1736 / 4805 |
| Fatalities: | 644 : 583 |
| The remains of a Pan Am B747 (top) and KLM B747 (bottom) in Tenerife, Canary Islands in the second worst aviation disaster in history, which killed a total of 583 people. The KLM 747 collided with a Pan Am 747 after the captain of the KLM plane started his takeoff roll without clearance. |