First flight of the prototype (YCH-53E) of Sikorsky S-80/H-53E Type series
Friday, March 1, 1974
- Sikorsky, Stratford, Connecticut, United States of America 
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Description
First flight of the Sikorsky S-80/H-53E Super Stallion, a 3-engined derivate from the S-65/H-53. Pilots were Frank A. Tefft and Byron Graham. The first production aircraft flew on 13 Dec 1980. Source: Sikorsky YCH-53E, with 18-Ton-Lift Capability, Makes First Flight, VERTIFLITE March/April 1974, Page 21
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