UPS and FedEx said they have grounded their combined fleet of more than 50 McDonnell Douglas MD-11 cargo planes following a crash in Louisville, Kentucky this week that killed at least 14 people.
A UPS MD-11 crashed late on Tuesday, erupting into a fireball moments after takeoff from Louisville's international airport.
The death toll from the crash, the cause of which is still under investigation, has risen to 14, according to a post on X by Louisville Mayor Craig Greenberg yesterday.
UPS and FedEx, the world's largest cargo carriers, said in separate statements that they grounded the aircraft "out of an abundance of caution."
FedEx said it operates 28 MD-11s and, according to a UPS factsheet, UPS had 27 in its fleet prior to the crash.
"We made this decision proactively at the recommendation of the aircraft manufacturer," UPS said in its statement.
Boeing, which acquired the MD-11 program through its1997 merger with McDonnell Douglas, said in an emailed statement it recommended that UPS and FedEx suspend flight operations of the MD-11 freighter.
"This recommendation was made in an abundance of caution and we will continue coordinating with the FAA on this matter," a Boeing spokesperson said.
Production of the MD-11 planes ended in 2000, and passenger service officially ended in 2014.
FedEx, which has a total fleet of 700 aircraft, said it was "immediately implementing contingency plans" to avoid disruptions. UPS said that its MD-11s account for only 9% of its fleet.
Still, any potential disruptions could have far-reaching consequences as FedEx and UPS are the workhorses for transferring goods around the world for major retailers like Amazon.com, Walmart and Target, as well as for manufacturers and businesses.
UPS is the number one air cargo service provider for the US Postal Service, transporting Priority and other speedy mail products.
NTSB leads probe
The US National Transportation Safety Board is leading the probe into the crash of the 34-year-old MD-11 freighter at the Louisville airport.
The plane reached about 30.5 metres above ground level before plunging in flames off the runway and destroying two nearby businesses.
One of the plane's three engines detached from the left wing as it rolled down the Louisville airport runway.
Yesterday, US safety investigators said that as a warning bell sounded in the cockpit, three UPS pilots had tried to wrestle control of the plane just before it crashed.
While UPS flight 2976 began uneventfully, a repeating bell was heard on the aircraft's cockpit voice recorder just 37seconds after the crew called for takeoff thrust, NTSB member Todd Inman told reporters.
NTSB anticipates issuing a preliminary investigation report into the crash in about 30 days.
The last UPS cargo plane to crash was in August 2013, when an Airbus aircraft went down on a landing approach to the international airport in Birmingham, Alabama, killing both crew members.
US hit with second day of flight cuts as shutdown drags on
Meanwhile, US airlines and travellers slogged through a second day of flight cuts across the country as the government shutdown was expected to drive more cancellations in the days to come.
The Federal Aviation Administration instructed airlines to cut 4% of flights at 40 major airports because of the shutdown.
The cuts will rise to 6% on Tuesday and then to 10% by November 14.
The cuts began at 6am Eastern Time (11am Irish time) yesterday, including about 700 flights from the four largest carriers - American Airlines, Delta Air Lines, Southwest Airlines and United Airlines.
Airlines will cut fewer flights today than yesterday because of lower overall volume.
United will cut 168 flights, down from 184 yesterday, while Southwest will cancel just under 100 flights, down from 120.
During the record 39-day government shutdown, 13,000 air traffic controllers and 50,000 security screeners have been forced to work without pay, leading to increased absenteeism.
Many air traffic controllers were notified on Thursday that they would receive no compensation for a second pay period next week.
