Maj. Eric "Doc" Spendlove's body remains missing.
Lawmakers asked the Government Accountability Office to look into the fleet's history in December.
With the Osprey out of commission, officials say carriers have other options for ferrying people and supplies on and off the ships.
More than 50 troops have died in Osprey accidents since the early 1990s.
By Tara Copp, AP
The search continues for the remains of two more missing airmen.
By Tara Copp, AP
The Air Force has recovered three bodies, is in the process of recovering another three troops and is still searching for two more.
American and Japanese crews continue to search for two people who are still missing.
Several military and civilian search-and-rescue units are scouring the water and coastline around the island of Yakushima, Japan.
A brief history of the iconic, sometimes deadly, V-22.
Officials have not said when the aircraft will be pulled out of Kaneohe Bay.
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