What is it with Falcon 9 Helium problems?
http://www.reddit.com/r/spacex/comments/268rse/what_is_it_with_falcon_9_helium_problems/
Why do pressure-fed systems have to be pressurized with helium or nitrogen?
http://space.stackexchange.com/questions/9311/why-do-pressure-fed-systems-have-to-be-pressurized-with-helium-or-nitrogen
SpaceX investigating Falcon 9 first stage helium leak
http://www.spaceflightnow.com/falcon9/010/140521helium/#.VZAxCflVhBd
21MAY2014
UPDATE: NO SPACEX FALCON 9 LAUNCHES UNTIL APRIL
18MAR2015
http://www.spaceflightinsider.com/organizations/space-exploration-technologies/reports-no-spacex-falcon-9-launches-until-april/
http://aviationweek.com/blog/spacexs-gwynne-shotwell-talks-raptor-falcon-9-crs-2-satellite-internet-and-more
Launch Slip for Turkmenistan
21MAR2015
Shotwell says an issue with helium tanks on the Falcon 9 v1.1 has prompted SpaceX to delay a March 21 commercial mission for the government of Turkmenistan. The company now hopes to launch Turkmensat-1 and an International Space Station (ISS) cargo resupply mission for NASA before April 17. “We were doing some component stress testing over the weekend and were a little uncomfortable with the helium bottle pressure onboard. It passed inspection, but now is not the time to have an issue in flight, so we’re going to go in and do some work on those bottles, so that will delay the flight.”