Helicopter Landing on Mount Everest: Possible, Extreme, and Rarely Done

Landing a helicopter on Mount Everest is technically possible but remains one of aviation's most extreme feats—achieved only a handful of times under exceptional conditions by elite pilots with specialized aircraft.

The Physics Barrier

Air density at 8,848 m (29,029 ft): ~33% of sea level. Rotor lift ∝ density. Engine power ∝ density. Both critically reduced.
Hover ceiling (OGE — Out of Ground Effect): Most helicopters: 3,000–4,500 m. Everest summit: 8,848 m. **No conventional helicopter can hover at summit altitude.**

The Two Successful Landings

1. Eurocopter AS350 B3 "Ecureuil" — May 14, 2005
Pilot: Didier Delsalle (test pilot, 15,000+ hrs).
Location: Summit (8,848 m).
Conditions: Perfect — calm wind, -20°C, high pressure (density altitude ~8,500 m).
Duration on summit: 3 minutes 50 seconds.
Modifications: Lightweight configuration, minimal fuel, no passengers. **First and only summit landing.**

2. Russian Mil Mi-17 — September 2013
Location: South Col (7,906 m / 25,938 ft) — saddle between Everest and Lhotse.
Duration: Several hours (troop insertion simulation).
Significance: Higher payload (twin-engine, 13+ troops), but **lower altitude** than summit. Demonstrated operational capability, not summit access.

Why Not Routine?

Margins are nonexistent: Any wind gust, temperature deviation, or weight miscalculation = loss of control.
No rescue possible: If helicopter fails, no second aircraft can reach it.
Physiological risk: Pilot/passengers at death zone altitude without acclimatization.
Regulatory prohibition: Nepal CAA and international norms prohibit commercial summit landings. Only experimental/test flights with special permission.

Practical Helicopter Use on Everest

Helicopters **routinely operate** to:
• Everest Base Camp (5,364 m) — standard for evacuations, supply, VIP transport.
• Camp 2 (6,400 m) — advanced rescues, high-altitude capable machines (AS350 B3, Bell 407).
• Long-line rescues from 7,000+ m — helicopter hovers *below* victim, raises them on line.

Summit landing remains a stunt, not a service. Climbers ascend on foot; helicopters serve the mountain's lower reaches.