American Airlines' pilots union leaders voted "no confidence" in American CEO Doug Parker, citing payroll errors, eroding employee morale, declining customer satisfaction, and a "toxic" work culture.

The Allied Pilots Association, representing 15,000 pilots at American, which operates a hub and more than 400 daily flights in Philadelphia, said the "straw that broke the camel's back" was when Parker skipped a meeting last week with President Trump and other airline industry executives at the White House. The union's board of directors and national officers voted Monday, after Delta Air Lines distributed $1.1 billion in profit-sharing payouts to workers. American will share $314 million with its workers this year, the first payout since 2000.

Separately, American's flight attendants picketed Tuesday at four airports — Dallas Fort Worth, Charlotte, N.C., Los Angeles, and Miami — to protest lack of a "fully implemented" contract, technical glitches that have caused staffing shortages and flight cancellations, and new employee uniforms that have caused allergic reactions for some workers.

In a statement, American said it shares a goal with the pilots to "have the opportunity to experience a prosperous and inspired career with lifetime employment for those who desire. We have a solid foundation in place upon which to build and are pleased with the progress thus far," the airline said. "Therefore, further public dialogue serves no purpose."

American said its 25,000 flight attendants have received pay increases averaging 27 percent since the merger. "We continue to work closely with the Association of Professional Flight Attendants to implement the new contract and fully realize all of the benefits of our merger." American merged with US Airways in December 2013, and at the time both airlines' labor unions supported the merger.

American shares closed down 84 cents, or 1.77 percent, to $46.57.