HONG KONG — The chairman of Cathay Pacific Airways said on Wednesday that he would resign, making him the second top executive of the embattled Hong Kong carrier to step down since protests began roiling the city.

In a filing Wednesday afternoon with Hong Kong’s stock exchange, the airline said that the executive, John Slosar, would resign as chairman and as an executive director in November. He will be replaced by Patrick Healy, 53, a longtime executive at John Swire & Sons (H.K.) Limited, the holding company that controls the airline.

Cathay characterized the planned resignation of Mr. Slosar, 63, as a retirement. Less than three weeks earlier, Rupert Hogg departed as the airline’s chief executive.

Mr. Slosar could not be reached for comment. In a memo to employees viewed by The New York Times, he described the recent weeks as the “most extraordinary and challenging times” the airline had experienced.