Ryanair has confirmed that it will issue legal proceedings against one of its pilots following this week's Channel 4 Dispatches programme about safety regulations.
Captain John Goss was dismissed yesterday for "gross misconduct".
He had also recently been given a warning by Ryanair after he gave a newspaper interview about safety issues at the airline.
In 2005 Capt Goss took a High Court case against the airline after it tried to invoke disciplinary proceedings against him.
At the time he claimed he was being victimised for his trade union activities.
The airline denied the claim and the case was settled.
He continued to work for the airline and was due to retire later this year.
In a memo circulated yesterday Ryanair outlined the reasons for dismissing Capt Goss and urged pilots not to "confuse industrial relations issues with safety".