1 August 2018
Aviation Week reports that The Boeing Company has determined the cause of a “propellant leak during a hot-fire test of the CST-100 Starliner launch abort engines and is moving ahead with an unmanned Starliner flight test in five to six months while it implements a repair plan ahead of pad abort and crew flight tests in mid-2019.” An investigation by Boeing, NASA, and Aerojet Rocketdyne found that “four of eight valves in the Starliner service module test article failed to close during a 1.5-sec. hot-fire of the launch abort engine on June 2, causing a propellant leak.” Boeing hopes to have repairs “in place and repeat the launch abort motor hot-fire test in time to support a pad abort flight test of Starliner Spacecraft 1 in April 2019.”  (Image Credit: NASA)
More Info (Aviation Week)