Because there is a dispute over this claim with the rest of the family in court, the board felt they should avoid further controversy and return to professional management of the team.
Under the leadership of the youngest son, the company was expanding into new markets in North America by signing a deal worth more than US$6 billion for 26 Boeing jetliners, making it Taiwan's biggest ever single commercial plane purchase.
Whether or not it was truly the wish of the founder Mr. Chang that the company he built be lead by his youngest son, we will never know for sure. It is now a matter for the courts and the board to determine the direction of the company simply because of a lack of proper business succession planning.
The Evergreen founder - who died in January of this year - started his company in 1968 with a single cargo vessel and launched EVA Air in 1991, which is Taiwan's second largest carrier.
He ranked 17th in the list of Taiwan's richest people with an estimated wealth of US$1.6 billion in 2015, according to Forbes magazine.
Source: http://www.channelnewsasia.com/news/asiapacific/taiwan-s-eva-air-ousts/2594118.html