US military clears Osprey aircraft to fly again despite four fatal crashes that have killed 20 service members

The U.S. military’s V-22 Osprey has been cleared to fly again, three months after an “unprecedented” part defect led to the deaths of eight service members in a crash in Japan, Naval Air Systems Command announced Friday.

The crash in Japan was the second fatal accident in three months and the fourth since March 2022, killing a total of 20 soldiers.

Among them was Marine LCpl. Evan Strickland, 19, who died in an Osprey crash in June 2022, when the MV-22 he was in crashed into the California dessert during a training flight.

Last November, eight Air Force Special Operations Command soldiers were killed when a CV-22B Osprey crashed off the coast of the Japanese island of Yakushima. to a rare fleet-wide grounding of hundreds of Marine Corps, Air Force and Navy Ospreys.

Before approving the Osprey, which can fly like an airplane and then convert into a helicopter, officials said they paid more attention to the proprotor gearbox, placed new restrictions on how it can be flown and had added maintenance inspections and requirements that gave them confidence that it could be done. return safely to the flight.

Officials briefing reporters on Wednesday ahead of the lifting of flight restrictions said they quickly grounded the entire fleet in December as it became clear that the way the Osprey component failed in that crash was something they had not done before. had seen on the tiltrotor aircraft.

Although officials did not identify the specific component because the Air Force’s crash investigation remains open, they said they now have a better — but not complete — understanding of why it failed.

“This is the first time we’ve seen this particular component fail in this way. And so this is unprecedented,” said Marine Corps Col. Brian Taylor, V-22 joint program manager at Naval Air Systems Command, or NAVAIR, which is responsible for the service-wide V-22 program.

However, the Defense Department’s decision to go back on the run before the conclusion of separate congressional investigations into the Osprey program drew criticism from the chairman of the House Oversight Committee.

“The DoD is lifting the ground order on the Osprey despite providing the Oversight Committee and the American people with no answers about the safety of this aircraft,” said Representative James Comer, a Republican from Kentucky.

“Serious concerns remain, including the accountability measures put in place to prevent accidents, a general lack of transparency, the way maintenance and operational maintenance are prioritized, and how the DoD assesses risk.”

A former Osprey pilot familiar with the investigation confirmed that the part in question is part of the proprotor gearbox, a crucial system that includes transmissions and clutches that connect the Osprey’s engine to the rotor to turn it.

The services have done a “deep dive” into the proprotor gearbox, and the new safety measures “will address the issues we saw in that catastrophic event,” said the head of Air Force Special Operations Command, Lt. Gen. Tony Bauernfeind , Wednesday. .

“I’m confident we now know enough to start flying again,” he said.

The proprotor gearbox system as a whole is a recurring problem area for the Osprey.

Service safety data obtained by The Associated Press shows dozens of cases in Marine Corps and Air Force Ospreys where power surges, sudden loss of oil pressure due to leaks, engine fires or chipping – where the metal components in the gearbox sometimes release dangerous metal chips – have damaged the proprotor gearbox during the flight, sometimes requiring an emergency landing.

Other components of the proprotor gearbox, including the sprag clutch and input spring, have been factors in previous crashes, and the services have made changes such as replacing those parts more frequently.

Marine Evan Strickland died at age 19 in an Osprey crash in June 2022, when the MV-22 he was in crashed in the California desert during a training flight

The services also look closely at the material the defective part is made of and how it is manufactured, Bauernfeind said. NAVAIR is also conducting further testing to help the services better understand why the component failed.

“It was a single component that failed in such a way that led to catastrophic consequences,” Bauernfeind said.

After testing is completed, he said, some of the operational safety controls now placed on the Osprey may be reduced “to give us more flexibility with the platform.”

The investigation, known as the Accident Investigation Board, will be made public and is expected to be completed within the next two months.

The proprotor gearbox failure was first reported by NBC News.

Japan’s government has also been briefed on the findings and the military’s plan to address the issue, the officials said. Japan also grounded its fleet of fourteen Ospreys after the crash.

Crews have now not flown for more than 90 days – a factor that will make their return to flight more dangerous.

The services said Wednesday they are taking a cautious approach that could take anywhere from 30 days to several months to retrain their crews before their Osprey squadrons can return to normal flying.

The Osprey has been in development for four decades, but only became operational in 2007.

The US military has flown the Osprey for approximately 750,000 hours, relying on its ability to quickly fly long distances as an aircraft and then convert it into a helicopter to conduct operations in the Middle East and Africa, where some squadrons of the Marine Corps was given an exemption to ban the flight because it was so critical to the mission.

In China’s future needs, the military has made plans to use the Osprey in the Indo-Pacific to operate on islands that lack the airfields needed for traditional aircraft.

But it has also been a controversial design of the first generation of military tiltrotor technology, which has caused more than 14 major accidents killing 59 people and in some cases leading to the loss of the aircraft, which could cost between 70 and 70 people depending on the situation. and costs $90 million. on the variants.

Neither service is planning new production orders for the V-22, which is produced by a joint venture between Bell Flight and Boeing.

The Army has contracted with Bell Flight to purchase the Osprey’s successor, the Bell V-280 Valor, a tiltrotor like the Osprey, but smaller and with a major design change: the engines remain in a fixed, horizontal position.

The crash in Japan was the second fatal accident in three months and the fourth since March 2022, killing a total of 20 soldiers

On the Osprey, the rotors and the entire nacelle housing the engine and propeller gearbox tilt to a vertical position when flying in helicopter mode.

The Marine Corps operates the vast majority of Ospreys, with more than 240 currently assigned to its 17 squadrons.

Its aviation mission depends on the aircraft’s return to flight, and the Marine Corps aims to keep the Osprey in its fleet through 2050, said Marine Corps Brigadier General for Aviation. General Richard Joyce.

“We can’t take our eyes off the V-22 and the years it will last,” Joyce said.

However, the Air Force, which has the second-most Ospreys in the fleet with about 50 assigned to its special operations mission, suggested Wednesday that it may consider other options.

Early concepts for the Osprey date back to the 1980s, when the Iran hostage crisis revealed the need for an airframe that could move quickly and hover or land like a helicopter, Bauernfeind said.

And it meets that need quite well, but it’s still an older platform, he said. “I think it’s time for us to start talking about the next generation of capabilities that can replace what the V-22 does.”