It was a plane crash that changed commercial aviation forever.
I’m not going to lie, those preflight safety talks by the crew before takeoff on a flight annoy the heck out of me because we’ve all heard them so many times before, and I always conjur up dark thoughts like, “If we’re in a situation where we need to pull out those flotation cushions from under our seats, we’re probably about to die anyway.”
I’m going to be a little more respectful from now on.
Such mandated warnings were a direct result of a tragedy that occurred some 74 years ago, when a Pan Am flight carrying 64 passengers and five crew members took off from San Juan, Puerto Rico on its way to New York City when it lost power and crashed into the Atlantic Ocean. Although 17 lucky souls survived the crash, 52 did not. And while the general area where the craft went down has been known for decades, its exact location has eluded investigators.
Until now.
Josh Gates, host of “Expedition Unknown” on the Discovery Channel, explains:
In April 1952, Pan Am’s Clipper Endeavor crashed into the Atlantic Ocean just minutes after takeoff. The tragedy will go on to change aviation forever, leading to safety procedures that continue to protect passengers today. Despite decades of searches, the aircraft remained lost… pic.twitter.com/ooqMSjibBd
— Discovery (@Discovery) July 21, 2026
In April 1952, Pan Am’s Clipper Endeavor crashed into the Atlantic Ocean just minutes after takeoff. The tragedy will go on to change aviation forever, leading to safety procedures that continue to protect passengers today. Despite decades of searches, the aircraft remained lost beneath the sea.
Now, more than 70 years later, Josh Gates and a team of experts from the Air/Sea Heritage Foundation and Deep Sea Vision have successfully located and identified the long-lost wreck of the Clipper Endeavor.
Follow along with this historic discovery and incredible journey when the new season of #ExpeditionUnknown returns later this year on Discovery.
@AirSeaHeritage @DeepSeaVision
Gates:
"I am proud to announce that a new expedition led by Air Sea Heritage, Expedition Unknown, and Eco Minerals Company/Deep Sea Vision, has located Pan Am Clipper Endeavor nearly 2,000 feet down on the ocean floor, largely intact.
"News about the discovery is breaking now, and it will be featured in depth in a special episode of Expedition Unknown coming later this year.
"I can't wait to share this story with you. It is remarkable."
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What happened way back in the day, and how did they find it now, decades later? The real tragedy actually occurred after the plane was already down:
The flight lasted less than nine minutes, the right two engines losing power in quick succession as the Douglas DC-4 made its initial climb from San Juan, Puerto Rico, en route to New York.
The pilot of the Pan American Clipper Endeavor had no choice but to ditch the plane at sea. All 69 of the passengers and crew members survived the initial crash on April 11, 1952, only for panic and confusion to hit in the precious few minutes after the water landing.
The plane’s tail section broke off and the fuselage sank, an accident that claimed 52 lives and became a catalyst for airline safety briefings and procedures for generations to come.
A years-long investigation led by Air/Sea Heritage Foundation (ASHF) in partnership with Deep Sea Vision (DSV), Eco Minerals Company, and the Discovery Channel finally located the doomed plane in June. Watch the magic moment:
ALERT: Research team found the Pan Am flight that crashed 74 years ago, killing 52 people, and changed airline industry standards forever.
— E X X ➠A L E R T S (@ExxAlerts) July 22, 2026
A Pan Am flight on April 11, 1952, was headed from Puerto Rico to New York with 64 passengers and five crew members aboard.
It crashed… pic.twitter.com/qU9HO7epWq
ALERT: Research team found the Pan Am flight that crashed 74 years ago, killing 52 people, and changed airline industry standards forever.
A Pan Am flight on April 11, 1952, was headed from Puerto Rico to New York with 64 passengers and five crew members aboard.
It crashed shortly after takeoff due to both right-side engines failing.
Although all passengers survived the initial impact, only 17 were rescued, while the others sank with the plane, which investigators blamed on a lack of safety briefings.
Because of the incident, airlines adopted the safety briefings we hear before takeoff today.
Air/Sea Heritage Foundation, along with Discovery Channel’s “Expedition Unknown” show, found the wreckage of the Pan Am “Clipper Endeavor” at the bottom of the Atlantic Ocean off Puerto Rico’s coast.
Josh Gates, a host of “Expedition Unknown,” said, “Every time you step onboard an airplane today, you are safer because of what happened to ‘Clipper Endeavor’ and her passengers three-quarters of a century ago.”
Gates talked about the overwhelming feelings he experienced upon finally discovering where the Douglas DC-4 had ended up. “Seeing the bright aluminum fuselage shining back at us from the ocean floor was a hugely emotional moment,” he recounted to NBC’s “Today” show on Tuesday.
When discoveries like this are made, it’s always important to take a moment to honor those whose lives were taken from them. This is an important find, however, and partially answers a mystery that has endured since the last century. Perhaps the victims would be moved to know that their sacrifice led to major improvements in aviation safety, and we are all better for it today.
Rest in Peace, Clipper Endeavor passengers.
