Investigation Summary
The mission involved transporting soldiers from the Nahal Brigade and munitions to the Beaufort Castle and 'Pumpkin' outposts in Lebanon. Due to the high risk of roadside bombs on ground routes, the IDF had shifted to aerial transport. On the night of the accident, the helicopters took off just seconds apart from the Mahanayim landing site near Rosh Pina. Investigation findings indicated that the rotor of one helicopter struck the tail of the other at an altitude of approximately 600 feet. The resulting impact caused both aircraft to plummet and explode. The investigation was complicated by the lack of flight data recorders (FDR) and cockpit voice recorders (CVR) on the military helicopters, as well as the fact that the crews were flying without lights to avoid detection by Hezbollah insurgents. An external commission of inquiry, headed by retired General David Ivri, was established to ensure transparency following public criticism of internal military investigations.
Final Conclusions
The official commission of inquiry failed to reach a definitive conclusion regarding the specific cause of the collision. The final seconds of the flight remain a mystery as there were no survivors and no cockpit voice recordings. However, the report noted that the crews were likely surprised and unaware of the impending collision. While technical failure was ruled out, the operational environment, involving night flying in close proximity without external lights and carrying heavy loads of ammunition, contributed to the catastrophic outcome.
Video Analysis
No video analysis linked for this case file yet.
Systems & Failure Modes
Sikorsky S-65C-3 Yas'ur 2000
An upgraded version of the CH-53 Sea Stallion used by the IAF for heavy transport.
Main Rotor System
The rotor of one helicopter struck the tail section of the other, leading to immediate loss of control.
Interesting Facts
- 01The accident is the deadliest military air disaster in Israeli history.
- 02The helicopters were flying without external lights to avoid detection by Hezbollah guerrillas.
- 03One helicopter crashed into a residential bungalow, but there were no casualties on the ground.
- 04The disaster is cited as a major factor in the eventual Israeli withdrawal from southern Lebanon in 2000.
- 05The investigation was led by an external committee headed by David Ivri, a former Air Force commander.
Safety Actions & Advisories
Establishment of External Inquiry
The Defense Minister appointed an external committee headed by David Ivri to investigate, departing from the standard practice of internal military-only investigations.
Flight Safety Review
The IAF conducted a comprehensive review of night-flying protocols and formation procedures for transport helicopters in combat zones.