The 1972 Andes crash, involving Uruguayan Air Force Flight 571, is one of history’s most harrowing survival stories. On October 13, 1972, a plane carrying 45 people crashed in the remote Andes Mountains. After 72 days of extreme cold and starvation, only 16 survivors were rescued, having endured the unthinkable to stay alive.
The Origin of Flight 571 and the Initial Impact
The journey began on October 12, 1972, when a Fairchild FH-227D twin-turboprop aircraft departed from Montevideo, Uruguay, bound for Santiago, Chile. On board was the Old Christians Club rugby team, along with several family members, friends, and the five-person flight crew. Because of severe mountain weather, the plane was forced to stay overnight in Mendoza, Argentina, before attempting the final leg of the trip the following day.
On October 13, the aircraft resumed its flight. Navigating the Andes requires precise timing and visual confirmation, as the peaks often exceed the flight ceiling of smaller turboprops. The pilots, mistakenly believing they had already passed the Curicó waypoint based on dead reckoning, began a premature descent into what they thought was the Chilean central valley. In reality, they were still deep within the high cordillera.
The aircraft struck a mountain ridge, shearing off both wings and the tail section. The remaining fuselage slid down a steep glacier—later named the "Glacier of Tears"—at high speed before coming to an abrupt halt in a snowbank at an altitude of approximately 11,710 feet (3,570 meters). Twelve people died during or immediately after the initial impact.
Immediate Aftermath: The First Seventy-Two Hours
The survivors found themselves in a landscape of total isolation. The temperature at that altitude regularly dropped to -30°C (-22°F) at night. Most passengers were dressed for a spring day in Santiago, wearing light jackets or blazers. The fuselage, though shattered at both ends, became their only refuge against the lethal wind.
The leadership of the group initially fell to the team captain, Marcelo Pérez. Under his direction, the survivors converted the wreckage into a makeshift shelter, using luggage to wall off the open end of the fuselage. Two medical students, Roberto Canessa and Gustavo Zerbino, began triaging the wounded with almost no supplies. They used seat covers as bandages and fashioned makeshift splints from plane debris.
By the second day, five more people succumbed to their injuries. The group faced an immediate and desperate lack of resources. There was no vegetation, no wildlife, and no natural source of liquid water at that altitude. They eventually learned to melt snow by placing it on thin sheets of aluminum scavenged from the seat backs, using the sun’s radiation to produce small amounts of water.
The Decisions that Defined Survival
As the days turned into weeks, the meager food supplies—a few chocolate bars, crackers, and a tin of jam—were exhausted. The survivors were faced with a biological reality: without protein, their bodies were consuming their own muscle tissue. The 1972 Andes crash is famously defined by the group's collective decision to resort to anthropophagy (consuming the bodies of the deceased) to survive.
This was not a decision made lightly. For days, the survivors discussed the ethical, religious, and legal implications of their choice. Most members of the group were devout Catholics; they eventually viewed the act through a theological lens, comparing it to the Eucharist or a "pact of souls" where they agreed that if they died, the others could use their bodies to live. This collective agreement provided the psychological framework necessary to endure the trauma of their situation.
On October 29, sixteen days after the crash, a new disaster struck. An avalanche swept down the mountain while the survivors were sleeping in the fuselage, burying them under several feet of snow. Eight more people died of suffocation. The survivors were trapped inside the buried fuselage for three days before they were able to dig themselves out. This event significantly reduced the group's numbers but also provided a grim "renewal" of their food source, which had been nearly depleted.
Technical Analysis of the Survival Timeline
The survival of the 16 individuals was a result of accidental advantages combined with intentional ingenuity. The following table highlights the critical phases of the 72-day ordeal.
| Phase | Duration | Key Challenges | Outcome |
|---|---|---|---|
| The Impact | Day 1 | High-altitude trauma, immediate fatalities | 33 initial survivors. |
| Isolation | Days 2–10 | Extreme cold, starvation, failed search efforts | Search called off on Day 11. |
| The Pact | Day 11–16 | Ethical crisis, biological starvation | Decision to use deceased for food. |
| The Avalanche | Day 17 | Suffocation, total burial of fuselage | 8 more fatalities; survivors trapped 3 days. |
| Expeditions | Days 18–60 | Physical atrophy, altitude sickness | Identification of "The Final Expedition" team. |
| The Trek | Days 61–71 | 38-mile hike, 15,000ft peaks | Encounter with Sergio Catalán. |
| Rescue | Day 72 | Logistics of helicopter extraction | 16 survivors safely evacuated. |
The Final Trek: Parrado and Canessa’s Journey
By December, the survivors knew they would not be found by search parties. The white fuselage was invisible against the snow from the air, and the Uruguayan and Chilean authorities had officially abandoned the search after only eight days. The group realized that the only way to survive was for a small team to hike out and find help.
Nando Parrado, Roberto Canessa, and Antonio Vizintín were selected for the final expedition due to their relative health. They spent weeks preparing, fashioning a sleeping bag from the plane's insulation and waterproof fabric to survive nights on the open mountain. On December 12, they began their ascent. They believed that if they climbed the mountain to the west, they would see the green valleys of Chile.
When they finally reached the summit—a peak of approximately 15,260 feet—they did not see a valley. Instead, they saw an endless sea of snow-capped mountains. Realizing the journey would be much longer than expected, Vizintín gave his rations to the other two and returned to the fuselage to save resources. Parrado and Canessa continued for another ten days, trekking nearly 38 miles through some of the most rugged terrain on Earth.
Their journey ended when they reached the Rio Azufre. On the opposite bank, they spotted a Chilean muleteer named Sergio Catalán. Because of the roar of the river, they could not hear each other. Catalán threw a rock wrapped in paper and a pencil across the water. Parrado wrote the famous note explaining they were from the "plane that fell in the mountains" and had been walking for ten days.
Legacy and Historical Perspective in 2026
As of 2026, the 1972 Andes crash remains a foundational case study in survival psychology and group dynamics. The site of the crash, the Glacier of Tears, has become a place of pilgrimage. While the fuselage was eventually burned and buried by the Chilean Air Force to prevent looting, a memorial cross stands at the site to honor those who perished.
The survivors, often referred to as "The 16," went on to lead varied lives, but many became motivational speakers, authors, and doctors. Roberto Canessa became a renowned pediatric cardiologist, frequently citing his experience in the mountains as the catalyst for his dedication to saving lives. Nando Parrado became a successful businessman and producer.
The story has been preserved through numerous books, most notably Alive by Piers Paul Read and Society of the Snow by Pablo Vierci. These accounts, along with various cinematic adaptations, have ensured that the lessons of the Andes—resilience, teamwork, and the will to live—continue to resonate more than half a century later.
Frequently Asked Questions
Why was the flight search called off so early?
The search was officially suspended after eight days because the white fuselage of the Fairchild FH-227D was nearly impossible to distinguish from the surrounding snow and glaciers. Furthermore, the search parties were looking in the wrong area because the pilot's last reported location was inaccurate. The survivors actually heard the news of the search being cancelled on a small transistor radio they had managed to get working on the eleventh day.
How did the survivors keep from freezing at night?
The survivors used several methods to combat the cold. They huddled together in the remains of the fuselage to share body heat and used seat covers and luggage to block the openings. For the final expedition, they used a makeshift sleeping bag sewn together from the aircraft’s thermal insulation, which was vital for surviving the nights during the ten-day trek across the mountains.
Did the survivors face legal consequences for their actions?
No. Upon their return, the survivors faced intense media scrutiny regarding how they stayed alive. However, the Catholic Church in Uruguay and Chile issued statements clarifying that under the extreme circumstances of "necessity," their actions were not considered a sin. Legally, no charges were ever brought, as the acts were recognized as a matter of biological survival in an "extreme state of necessity."
Who were the 16 survivors of the 1972 Andes crash?
The survivors were José Pedro Algorta, Roberto Canessa, Alfredo "Pancho" Delgado, Daniel Fernández, Roberto "Bobby" François, Roy Harley, José Luis "Coche" Inciarte, Álvaro Mangino, Javier Methol, Carlos Páez Rodríguez, Nando Parrado, Ramón "Moncho" Sabella, Adolfo "Fito" Strauch, Eduardo Strauch, Antonio Vizintín, and Gustavo Zerbino.
Is it possible to visit the crash site today?
Yes, guided expeditions to the "Glacier of Tears" are possible, usually departing from the Argentinian side of the Andes in Mendoza. These trips typically involve multi-day treks or horseback rides. Visitors are expected to treat the area with extreme respect, as it remains a gravesite for the 29 people who did not return.
Recommendations for Further Study
For those interested in the technical and psychological aspects of the 1972 Andes crash, a multi-disciplinary approach is recommended:
- Read Primary Accounts: Prioritize memoirs written by the survivors, such as Nando Parrado's Miracle in the Andes or Roberto Canessa's I Had to Survive. These provide deep insight into the internal decision-making processes of the group.
- Study Aviation Safety Records: Research the flight characteristics of the Fairchild FH-227D and the specific navigational challenges of the "Planchon Pass" to understand the technical failures that led to the accident.
- Visit Museums: The Andes 1972 Museum in Montevideo, Uruguay, offers an extensive collection of artifacts, photographs, and detailed explanations of the survival equipment fashioned by the group.
- Analyze Group Dynamics: Use the event as a case study for "The Social Contract" in extreme environments, focusing on how the group maintained order and morale despite repeated catastrophes.
