Falcon 9 Flight 10 is a Falcon 9 space launch that occurred on July 14, 2014. It was the fifth launch of the Falcon 9 v1.1 launch vehicle and carried six Orbcomm OG2 telecommunication satellites. All six 172-kilogram-mass (379 lb) satellites were successfully deployed.
Following the first stage loft of the second stage and payload on its orbital trajectory, SpaceX conducted a successful flight test on the spent first stage that received considerable news attention. In the event, the first stage successfully decelerated from hypersonic velocity in the upper atmosphere, made a successful reentry, landing burn, and deployment of its landing legs and touched down on the ocean surface. The first stage was not recovered however as the hull integrity was breached on landing or on the subsequent "tip over and body slam".
This was the third high-altitude post-mission test of this type, after the first test on Falcon 9 Flight 6 in September 2013, and a second test in April 2014. The April test resulted in the first successful controlled ocean soft touchdown of a liquid-rocket-engine orbital booster and included landing legs for the first time which were extended for the simulated "landing".
^ ab"SpaceX Falcon Rocket Sends Up a Six-Pack of Satellites". NBC. 2014-07-14. Retrieved 2014-07-14. Musk: 'Rocket booster reentry, landing burn & leg deploy were good, but lost hull integrity right after splashdown (aka kaboom) ... Detailed review of rocket telemetry needed to tell if due to initial splashdown or subsequent tip over and body slam'.