NEW : Repairs to leaky hydrogen gas vent line went well , NASA says . CNN hopes launch , scrubbed Sunday , will happen this week about 4:30 p.m. . The launch had been delayed previously to allow time to check a `` flow-control valve in the shuttle 's main engines , '' NASA said last week . Shuttle launch postponed this week because of leak in a venting system . Shuttle to deliver supplies to the International Space Station .
NEW : Repairs to leaky hydrogen gas vent line went well , NASA says . CNN hopes launch , scrubbed Sunday , will happen this week about 4:30 p.m. . Shuttle launch postponed this week because of leak in a venting system . Shuttle to deliver supplies to the International Space Station .