In the late 1980s , the USAF started to replace their OV - 10s with OA - 37B and OA - 10A aircraft .
The USAF lost 64 OV - 10 Broncos during the war , to all causes .
In the late 1980s , the USAF started to replace USAF 's OV - 10s with OA - 37B and OA - 10A aircraft .
The USAF lost 64 OV - 10 Broncos during the war , to all causes .