This model is a version of S-56 H-37
Helicopter Sikorsky H-37A Mojave Serial 56-143 Register 58-998 used by US Army Aviation. Built 1960. Aircraft history and location
| US Army Aviation |
|1960-01-22||Sikorsky S-56, c/n 56-143, ff:?|
del US ARMY as H-37A, 58-998, 22Jan60
redesig CH-37A, Oct 62
conv CH-37B, unk
wfu & soc unk.