Mr Hogg, who was appointed CEO in May 2017, said in an email cited by Reuters that the incident was a "grave and critical time" for Cathay Pacific, adding that there was "no doubt" that the company's brand and reputation were under "immense pressure".
The Global Times, another Chinese government-owned media company, said on August 7 that Cathay Pacific ground staff leaked flight information about Hong Kong police officers boarding a plane.
The Chinese government, through its CAAC civil aviation agency, has threatened Cathay Pacific with new rules that force it to provide information on any crews who operate flights into the mainland or through Chinese airspace. Tang was previously the head of Hong Kong Aircraft Engineering Company (HAECO), which is owned by Swire Pacific Ltd, as is Cathay. "This is regrettable as we have always made safety and security our highest priority", John Slosar, chairman of Cathay Pacific, said.
Hogg said in the statement that he and Loo would "take responsibility as leaders of the company" and the resignation would take effect Monday (Aug. 19).
In recent weeks the company saw itself embroiled in the controversy over the ongoing anti-extradition bill protests in Hong Kong.
Cathay Pacific, an emblem of the city, was blindsided last week when China's aviation regulator demanded it suspend staff supporting a movement that has mushroomed from opposition to a legal change in Hong Kong into wider calls for democracy.
While official data has yet to fully reflect the impact of the latest violence, a private survey by IHS Markit found business activity in Hong Kong contracted for the 16th straight month in July, falling to a level not seen since March 2009.
"I think we'd really need to see a total breakdown and a sense that China's national interests were at great risk and could not be protected by the Hong Kong government and its police", he said.
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Augustus Tang, 60, replaced Hogg.
Once a dominant player in Asia's premium air travel market with few serious rivals, Cathay brought in Hogg in 2017 after the airline reported its first loss in eight years.
Demonstrators say they are fighting the erosion of the "one country, two systems" arrangement that has enshrined some autonomy for Hong Kong since China took it back from Britain in 1997. Four employees have since been sacked and a pilot suspended.
But Western and Asian diplomats in Hong Kong said Beijing has little appetite for rolling the PAP or the People's Liberation Army onto Hong Kong's streets.
"I do appreciate their courage and caring about Hong Kong. they are definitely braver than our government", she said. One of the pilots was arrested and charged with rioting.
Several thousand people attended a student-led rally in Hong Kong's Chater Garden on Friday, opening a series of protests in various parts of the one-time United Kingdom colony.