May 6 (Reuters) - Two years after its initial unmanned

journey to the International Space Station (ISS), Boeing's ( BA )

new Starliner astronaut capsule is set for its first

crewed test flight on Monday night, following numerous delays.

Boeing's ( BA ) Crew Space Transportation (CST)-100 Starliner

spacecraft, developed in collaboration with NASA's Commercial

Crew Program, is engineered to carry up to seven passengers, or

a combination of crew and cargo, for journeys to low-Earth

orbit.

Riding aboard the Starliner are NASA astronauts Barry

"Butch" Wilmore, 61, a retired U.S. Navy captain, and Sunita

"Sunni" Williams, 58, a former Navy aviator and test pilot.

Here's a quick rundown of key events over the past few

years:

Sept. 4, 2015 - Boeing ( BA ) takes the wraps off an assembly plant

for its first line of commercial spaceships, which NASA plans to

use to fly crews to the ISS.

Nov. 4, 2019 - Boeing ( BA ) says one of three parachutes failed to

open during a crucial unmanned test of the CST-100 Starliner.

Dec. 20, 2019 - Boeing ( BA ) successfully launches its new

astronaut capsule on an unmanned debut journey to the ISS.

Dec. 22, 2019 - The spacecraft makes a "bull's-eye" landing

in the New Mexico desert.

Jan. 7, 2020 - NASA and Boeing ( BA ) probe software glitch that

stopped the capsule from reaching the ISS.

Feb. 6, 2020 - Boeing ( BA ) narrowly misses a "catastrophic

failure" during its December flight test of an unmanned space

taxi that was cut short by an unrelated problem.

Aug. 25, 2020 - The first Starliner crewed mission is

tentatively slated for 2021

Oct. 7, 2020 - The chief astronaut for Starliner crewed

flight to the ISS, Chris Ferguson, steps down from the job,

citing family priorities

July 29, 2021 - Space station mishap prompts NASA to

postpone launch of Boeing Starliner

Aug. 3, 2021 - Boeing ( BA ) postpones Starliner launch after new

glitch

Aug. 13, 2021 - Boeing ( BA ) to return the spacecraft to the

factory to resolve a valve issue, delaying the launch date

May 19, 2022 - The Starliner capsule launches on a do-over

uncrewed test flight bound for the International Space Station

May 20, 2022 - The new Starliner crew capsule docked for the

first time with the International Space Station

Aug 25, 2022 - Boeing ( BA ) targets early 2023 for the first

Starliner mission carrying astronauts

June 1, 2023 - Boeing ( BA ) says it is standing down from late

preparations for its first crewed Starliner test flight to space

that was planned for July 2023 after it discovered two

safety-critical issues with the spacecraft.

(Reporting by Nathan Gomes and Shivansh Tiwary in Bengaluru;

Editing by Anil D'Silva)