Gov. Arnold Schwarzenegger replaced most members of the state Board of Registered Nursing on Monday, citing the unacceptable time it takes to discipline nurses accused of egregious misconduct.

He fired three of six sitting board members -- including President Susanne Phillips -- in two-paragraph letters curtly thanking them for their service. Another member resigned Sunday. Late Monday, the governor's administration released a list of replacements.

The shake-up came a day after The Times and the nonprofit news organization ProPublica published an investigation finding that it takes the board, which oversees 350,000 licensees, an average of three years and five months to investigate and close complaints against nurses.

During that time, nurses accused of wrongdoing are free to practice -- often with spotless records -- and move from hospital to hospital. Potential employers are unaware of the risks, and patients have been harmed as a result.

Reporters found nurses who continued to work unrestricted for years despite documented histories of incompetence, violence, criminal convictions and drug theft or abuse. In dozens of cases, nurses maintained clean records in California even though they had been suspended or fired by employers, disciplined by another California licensing board or restricted from practice by other states.

"It is absolutely unacceptable that it takes years to investigate such outrageous allegations of misconduct against licensed health professionals whom the public rely on for their health and well-being," Schwarzenegger said in a written statement.

Board member Andrea Guillen Dutton, in a resignation letter Sunday, said she was leaving in frustration. "Certain 'bad actors' are jeopardizing the reputation of the entire nursing profession," she wrote. "This deeply saddens me."

"I have fought to defend the integrity of patient care throughout the state by holding the negligent accountable," she wrote. "However, I have grown increasingly frustrated by the board's lack of ability to achieve its stated objectives in a timely and efficient manner."

Besides Phillips, the other fired board members were vice president Elizabeth O. Dietz, a professor of nursing at San Jose State, and Janice Glaab, a public affairs consultant.

Schwarzenegger's action Monday fills two of three vacancies on the board and replaces four of the board's sitting members -- all of whom had been appointed by him. The two remaining members are Nancy L. Beecham, appointed by the governor in 2006, and Dian Harrison, who was appointed last year by Assembly speaker Karen Bass.

Beecham and Harrison could not be reached late Monday, nor could any of the departing board members.

Schwarzenegger's statement said his "administration is dedicated to protecting public health and safety, and the new board will act quickly and decisively to achieve that goal."

Fred Aguiar, secretary of the State and Consumer Services Agency, said in an interview that the new board would be asked immediately to come up with a plan to eliminate the case backlog. "This plan needs to include how many more investigators are needed, how much that will cost. . . . I want to know now."

The governor's decision does not directly affect the standing of Ruth Ann Terry, who has been the board's executive officer for nearly 16 years and a staff member for 25. Only the board has the power to hire and fire the executive.

Terry, reached late Monday, hung up on a reporter, saying, "We don't have anything to say."

But Aguiar suggested Monday that Terry and other staffers could be vulnerable. The governor "supports the new board in its commitment to protecting patients -- and if that means cleaning house, including board staff, so be it," he said. "The days of excuses and status quo are over. It's broken and we're going to fix it."

The Times and ProPublica found that the board relied heavily on Terry and her staff. At five public meetings attended by reporters since November 2007, Terry never focused on the delays in disciplining errant nurses. Neither did board members, even though they must vet all disciplinary actions.

In an interview last week, Terry acknowledged that the system needed to be "streamlined" but blamed other parts of the state's bureaucracy for delays.

Early Monday, Terry and her assistant executive officer, Heidi Goodman, sent an e-mail to all board staff encouraging them not to lose heart.