| 1977 Israeli Air Force Sikorsky CH-53 Sea Stallion crash | |
| Image Upright: | 1.15 |
| Type: | Controlled flight into terrain |
| Occurrence Type: | Accident |
| Site: | Jordan Valley |
| Fatalities: | 54 |
| Aircraft Type: | Sikorsky CH-53 Sea Stallion |
| Tail Number: | 960 |
| Occupants: | 54 |
| Passengers: | 44 |
| Crew: | 10 |
| Survivors: | 0 |
On May 10, 1977, an Israeli Air Force Sikorsky CH-53 Yas'ur helicopter crashed during an exercise in the Jordan Valley, killing all 54 on board (including the 10-member flight crew). The disaster became known as Ason HaNun-Daled, or "Disaster of the 54".[1]