First flight of the Boeing-Sikorsky RAH-66 Comanche (YRAH-66)
Thursday, January 4, 1996
- Sikorsky Flight Development Center, West Palm Beach, United States of America 
This is a Notable Operational milestone.
Description:
This was the first flight of the #1 prototype. Pilots were Sikorsky Test Pilot Rus Stiles and Boeing Test Pilot Bob Gradle.
The flight took place at the Sikorsky Development Flight Test Center at West Palm Beach, FL USA.
Source: "LHX/LH Competition", Ken Bartie, AHS 2018 VTOL History Calendar - January
