The wreckage of a Pan American World Airways flight that crashed off the coast of Puerto Rico in 1952 has been discovered, more than 70 years after the incident. The crash of the DC-4, known as the Clipper Endeavor, resulted in the deaths of 52 people and contributed to significant reforms in airline safety, including mandatory pre-flight passenger safety briefings.
Searchers recently located the fuselage and separated tail of the aircraft in nearly 2,000 feet of water using an autonomous underwater vehicle equipped with high-resolution sonar. The plane ditched in the ocean after losing engine power shortly after departing from San Juan, Puerto Rico, with New York City as its destination.
Survivors of the crash recounted difficulties in locating life vests and retrieving life rafts, and the plane sank within minutes of its emergency landing. Investigations by the Civil Aeronautics Board, the predecessor to the Federal Aviation Administration, attributed the accident to inadequate maintenance that led to engine failure and the captain's handling of the aircraft after power loss.
The struggle of the occupants to access flotation devices during the crash is credited with helping to drive aviation safety improvements. These reforms included mandating preflight passenger briefings and enhancing the design and accessibility of flotation equipment.
The search for the wreckage was initiated in 2019 by Russ Matthews, president of the Air/Sea Heritage Foundation, after a luggage tag from the flight washed ashore in Florida. This discovery prompted years of archival research, consulting Pan Am and Coast Guard records, as well as accident reports.
A crucial breakthrough came from historical records in Puerto Rico, including a map created by Air Force pilots who witnessed the accident during a training flight and provided an estimated crash site. Previous attempts to locate the wreckage were hampered by bad weather and less advanced technology.
Tony Romeo, CEO of the undersea exploration firm Deep Sea Vision, collaborated with Matthews, bringing an advanced underwater drone, originally designed for military applications like mine detection, to the search area. The drone successfully located the wreckage on its first pass over a 10-square-nautical-mile area, identified through synthesized research and historical weather data.
Deep Sea Vision has previously undertaken expeditions, including an unsuccessful mission to find Amelia Earhart's plane. The successful discovery of the Clipper Endeavor's wreckage marks a significant find, potentially offering new insights into the incident and its impact on aviation safety.