Boeing Tests Starliner Spacecraft's Launch Abort System for Rocket Emergencies

Boeing's CST-100 Starliner crewed vehicle aced a crucial safety test this morning (Nov. 4) in the New Mexico desert.

Called a pad abort test, the drill checked the vehicle's ability to carry astronauts to safety should engineers notice an anomaly with the rocket that could endanger a launch. That scenario means that during a pad abort test, the capsule has to quickly pick up enough speed to carry humans to safety, starting from a standstill.

"That was phenomenal," Boeing spokesperson Jessica Landa said during a live broadcast of the test. "Initial indication is we've had a very successful pad abort test today."

Video: How Boeing's Starliner Pad Launch Abort Test Works
The Emergency Launch Abort Systems of SpaceX and Boeing Explained

Boeing conducted a pad abort test of its CST-100 Starliner crew capsule on Nov. 4, 2019 from the White Sands Missile Range in New Mexico. (Image credit: NASA TV)

The test occurred on Launch Complex 32 at White Sands Missile Range in New Mexico. The Boeing team had arranged for a three-hour launch window for the test, although the capsule was only in the air for a little over a minute. The launch occurred at 7:15 a.m. local time (9:15 a.m. EST, 1415 GMT).

All three astronauts who will fly on Starliner's first crewed launch, a demonstration mission to the International Space Station, were present at today's test.

"We hope we never need to use this system," NASA astronaut Mike Fincke said. "We know after today's test we'll be able to get off safely and come back and try another day."

Boeing is hoping the trio will fly next year. "It's starting to feel really close, it's amazing, especially being here for the test," NASA astronaut Nicole Mann said. "Big milestones like the test today are just showing that we're getting a lot closer."

NASA spokesperson Dan Huot, Boeing astronaut Chris Ferguson, NASA astronauts Nicole Mann and Mike Fincke, and Boeing spokesperson Jessica Landa spoke after a pad abort test on Nov. 4, 2019. (Image credit: NASA TV)

For today's test maneuver, the capsule was equipped with an anthropomorphic test dummy equipped with sensors to gather data that will help Boeing engineers evaluate the results of the test.

During the test, the Starliner capsule was programmed to reach a speed of 650 mph (1,046 km/h) in just 5 seconds. Engines on board the spacecraft fired intermittently over the course of 10 seconds in order to carry the capsule away from the launch pad and the hypothetical unstable rocket.

"I hope you didn't blink!" Landa said. "That thing sure did shoot off the test stand, didn't it?"

Then, the spacecraft oriented itself and a suite of parachutes released in three pulses over the course of about 25 seconds. The parachutes are crucial for crew safety because they both slow the capsule down and orient the spacecraft for a safe landing.

Those parachutes come in three pulses: two drogue parachutes, three pilot parachutes and three main parachutes. Only two of the last category deployed during today's test, but that is within the range of acceptable safety conditions for the vehicle, Landa said.

"We did have a deployment anomaly, not a parachute failure. It’s too early to determine why all three main parachutes did not deploy, however, having two of three deploy successfully is acceptable for the test parameters and crew safety," Boeing spokesperson Todd Blecher said in a statement.  "At this time we don’t expect any impact to our scheduled Dec. 17 Orbital Flight Test. Going forward we will do everything needed to ensure safe orbital flights with crew.”

About 60 seconds into the procedure, the Starliner capsule jettisoned its heat shield and deployed airbags to soften the landing still further.

Related: Boeing’s CST-100 Starliner: A 21st Century Space Capsule in Photos

Two of the three main parachutes on board Boeing's Starliner capsule deployed successfully during the capsule's Nov. 4, 2019, pad abort test. (Image credit: NASA TV)

The Starliner capsule is designed to return crew members to land, in part to make the vehicle more easily reused, according to Landa. However, during a real pad abort, from Starliner's launch site in Florida, a pad abort would trigger a landing over the Atlantic Ocean.

Today's test took place on the same stand where NASA's Orion crew capsule conducted the same drill a few years ago, according to NASA spokesperson Dan Huot.

Boeing's next launch for the Starliner vehicle, its uncrewed demonstration mission to the International Space Station, is scheduled for Dec. 17 from Florida.

Email Meghan Bartels at or follow her @meghanbartels. Follow us on Twitter @Spacedotcom and on Facebook.

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at:

Meghan Bartels
Senior Writer

Meghan is a senior writer at and has more than five years' experience as a science journalist based in New York City. She joined in July 2018, with previous writing published in outlets including Newsweek and Audubon. Meghan earned an MA in science journalism from New York University and a BA in classics from Georgetown University, and in her free time she enjoys reading and visiting museums. Follow her on Twitter at @meghanbartels.