Amazon and Boeing shares fell on Tuesday as investigators stepped up their investigation into a deadly plane crash at Miami International Airport.
On Sunday, five people died when a Boeing 767 cargo plane, operated for Amazon by 21 Air, went off the runway at Miami International Airport. The pilot and co-pilot were finishing the plane’s third flight of the day when it landed just before 2 p.m. Eastern time.
National Transportation Safety Board chair Jennifer Homendy said the plane did not stop after landing. It hit navigation equipment, a van with seven people inside, a fence, and a car before crashing into another fence and stopping at a Tesla robotaxi station.
Flight-tracking data shows the 32-year-old plane flew commercial routes from 1994, when it was built, until 2015, when it was converted for cargo. Federal Aviation Administration records say a New York-based leasing company owns the plane. The NTSB has sent 32 investigators to Miami, where they will spend at least a week looking into flight operations, aircraft performance, onboard systems, engines, weather, runway design, and emergency response.
Investigators will look closely at 21 Air’s operating policies and its contract with Amazon. Homendy told reporters that although Amazon owns the cargo operation, it hired 21 Air to run the flights. This raises questions about how the two companies share safety responsibilities.
Amazon’s air cargo network has over 100 planes, including Boeing 767s, 737s, and Airbus A330s, according to its website. These planes support about 250 daily flights across North America, Latin America, Asia, and the Europe, Middle East, and Africa region through partner airlines. In a July sustainability report, Amazon said only 3% of its transoceanic shipments went by air in 2025, down from 10% the year before. Amazon did not respond right away to a request for comment.
21 Air is an all-cargo airline based in Greensboro, North Carolina. It runs a 24/7 operations center in Miami and is allowed to fly Boeing 767 cargo planes both in the U.S. and internationally, including between the U.S. and Mexico. The airline did not respond right away to a request for comment. Boeing said it is supporting the NTSB’s investigation.
Amazon shares dropped about 1%, and Boeing also fell slightly, matching a wider drop in market futures before the market opened.
