The US army has grounded its whole fleet of F-35 fighter jets within the wake of a crash in South Carolina final month.
Inspections are to be carried out on defective gasoline tubes.
An official report questioned earlier this 12 months whether or not the F-35 was prepared for fight after dozens of faults have been discovered.
The F-35 is the most important and most costly weapons programme of its sort on the earth.
The aircraft has been offered to a variety of international locations, together with the UK and Japan.
It was first utilized in fight by Israel earlier this 12 months to hold out two strikes.