NORFOLK, Va. (AP) -- The Air Force began grounding about one-third of its active-duty combat aircraft on Tuesday because of automatic federal spending cuts, including squadrons of fighters, bombers and airborne warning and control craft.
The stand down will affect units stationed in the U.S., Europe and the Pacific, though the Air Force didn't immediately provide a list of the units and bases that will be affected.
Some units that include F-16s, F-22s, A-10s and B-1s will stand down after they return home from their deployments. Other units began the stand down Tuesday.
"We must implement a tiered readiness concept where only the units preparing to deploy in support of major operations like Afghanistan are fully mission capable," Gen. Mike Hostage, commander of Air Combat Command at Joint Base Langley-Eustis, said in a statement. "Units will stand down on a rotating basis so our limited resources can be focused on fulfilling critical missions."
The Air Force says the stand-down is the result of cuts to the command's operations and maintenance account. The Air Force says it must reduce its flying by about 45,000 fewer training hours by Oct. 1 than previously scheduled.
"The current situation means we're accepting the risk that combat airpower may not be ready to respond immediately to new contingencies as they occur," Hostage said.
The Air Force says it generally takes 60 to 90 days to conduct the training needed to return aircrews to mission-ready status. For affected units, the Air Force says it will shift its focus to ground training.
That includes the use of flight simulators and academic training to maintain basic skills and aircraft knowledge, Air Combat Command spokesman Maj. Brandon Lingle said.
Lingle said aircraft maintainers would clear up as much of a backlog of scheduled inspections and maintenance that budgets allow.
Brock Vergakis can be reached at www.twitter.com/BrockVergakis