A safety stand-down for the bombers was issued on 20 April by Air Force Global Strike Command (AFGSC) commander general Tim Ray.

The AFGSC oversees all of the airforce’s bomber fleets. The B-1B Lancer is one of three strategic bombers of the USAF.

The grounding order was issued as one of the B-1B bomber experienced an emergency due to a fuel leak problem on 8 April at Ellsworth Air Force Base in South Dakota, US.

According to AFGSC, the precautionary safety stand-down and inspection resulted in the discovery of a discrepancy with the aircraft.

To address this discrepancy, the maintenance depot crew disassembled the Augmenter Fuel Filter Housing of the bombers and conducted a series of inspections using advanced techniques.

After being determined as defect-free, each unit was reassembled, pressure checked and returned to service.

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US Air Force bomber force 8th airforce commander major general Mark Weatherington said: “We are proud of the tremendous efforts of our maintainers and B-1 partners in identifying, inspecting, and remediating any potential issues with the B-1B fuel filter housing.

“The aircraft are still safe to fly and we are confident that this stand-down has resulted in increased safety within the B-1B fleet.”

In June last year, AFGSC launched a national innovation hub during a virtual event conducted at Cyber Innovation Center in Bossier City, Louisiana, US.