The U.S. Army has grounded it fleet of CH-47 Chinook helicopters while it conducts corrective maintenance to resolve a risk of engine fires on some aircraft, Army Times reports. The Army operates some 400 of the heavy-lift helicopters, which first entered service in the 1960s. Here’s a look at the CH-47 Chinook on recent deployments and training exercises.

U.S. and NATO allies utilized CH-47 Chinooks from the First Air Cavalry Brigade for an air assault operation during DV-Day as part of Exercise Swift Response at Krivolak Training Area, North Macedonia, May 12, 2022.

Staff Sergeant Malcolm Cohens-Ashley/U.S. Army