US aviation authorities have ordered that all models of a cargo plane that crashed mid-takeoff in Kentucky on Tuesday be grounded.
It comes after a Boeing MD-11 aircraft operated by UPS burst into flames on the runway of Louisville International Airport before colliding with neighboring businesses, killing 14 people.
The American delivery firm had earlier said it would not operate the planes pending an ongoing investigation, with FedEx then following suit.
Now the Federal Aviation Administration (FAA) has issued a formal notice banning all MD-11 and MD11F aircraft from flying until safety checks are carried out.
In total, 70 models are in use with UPS, FedEx, and Western Global Airlines.
FAA officials said the Kentucky crash happened after the plane's left engine caught fire and detached from the wing during take-off.
The aircraft was carrying 38,000 gallons (144,000 liters) of fuel as it took off for a flight to Hawaii, which contributed to the size of the fire after the crash.
A total of 14 people were killed in the crash and subsequent fire, including one person who had been admitted to hospital, Louisville Mayor Craig Greenberg has said.
Boeing welcomed the directive and advised the airlines using the model to stop operations out of an abundance of caution.
The final passenger flights using an MD-11 ended in 2014, with the model now used exclusively as a cargo carrier.
Originally manufactured by McDonnell Douglas, production of the MD-11 ended in 2000.
