While none of the aircraft are allowed to fly, technically speaking, this is not an official priming of the fleet, as every single aircraft may immediately return to flight after inspection.
"Down's safety standard will give maintenance and aircraft flight equipment technicians the time to thoroughly inspect each aircraft," the Air Force's Global Strike Command said in a statement.
"When these inspections are completed and all problems are resolved, the planes will return to flight, "the statement added.
The Global Strike Command would not estimate how long the inspections would take.
According to the Air Force, the problem is Drogue chute was not associated with an earlier problem with the ejection seat of the aircraft, which had led to a similar result safety clearance last year.
The B-1 is a conventional bomb He was created in 2018 after the use of chemistry weapons used by the regime for air strikes against Syrian military targets.