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Of all the aircraft flown by the US. military, the only type that met its mission readiness goals every year for the past decade is the Air Force’s outgoing UH-1N Huey.
In a sweeping Government Accountability Office (GAO) study of mission-capable rates for 46 U.S. military aircraft between 2011 and 2019, none of the other 11 types of rotorcraft came close to matching the Huey.
The GAO defines “mission capable rate,” which is used to assess the health and readiness of an aircraft fleet, as the percentage of total time when the aircraft can fly and perform at least one mission. Each service determines a mission capable goal for its aircraft, and tracks and reports aircraft mission capable rates.
Of the 12 models of rotorcraft flown by branches of the U.S. military, only the Navy’s MH-60R comes close to meeting its annual mission-capable goals and it only hit that target twice between fiscal years 2011 and 2019. Third best was again the Air Force, with its HH-60G Pave Hawk, which met its mission-capable goals one of the nine years.
“The UH-1N fleet exceeded its mission capable goal in each year from fiscal year 2011 to fiscal year 2019, and exceeded its aircraft availability goal in three years during that same time period,” GAO found. “In fiscal year 2019, the UH-1N fleet did not meet its aircraft availability goal, but exceeded its mission capable rate goal.”
Every other model of rotorcraft from the Army’s AH-64 Apache gunship to the Marine Corps’ CH-53E Super Stallion failed to achieve the desired mission-capable rates all nine years. In fairness, the Air Force also failed to maintain its CV-22 Ospreys at optimal rates every year from fiscal years 2011 to 2019.
There are a variety of reasons listed for why the aircraft are not meeting readiness targets, but the report concludes that “DOD has generally not met established mission capable goals” for the fixed- and rotary-wing aircraft it studied.
All models of rotorcraft have suffered from parts shortages and delays in obtaining parts, while nearly half have seen readiness issues related to unscheduled maintenance, unscheduled replacement of parts, a shortage of trained maintainers and other causes.
GAO collected and analyzed data on mission capable rates and operating and service (O&S) costs from the Departments of the Army, Navy, and Air Force for fiscal years 2011 through 2019. GAO reviewed documentation and interviewed program office officials to identify reasons for the trends in mission capability rates and O&S costs as well as any challenges in sustaining the aircraft.
There are several caveats to the UH-1N being the most mission-ready aircraft in the U.S. military. For starters, unlike its more-modern Marine Corps counterpart the UH-1Y, it is not a combat aircraft. Its primary mission is to patrol and guard the nation’s nuclear missile fields under the command of Air Force Global Strike Command.