Ottawa said on Thursday that the deal was under review due to concerns about the human rights record of Duterte, the subject of a complaint being considered by the International Criminal Court over the alleged "mass murder" of thousands of Filipino drug suspects.
The Philippine defence department signed the 12- billion-peso (US$234.8 million) Bell 412EPI deal with the state-run Canadian Commercial Corp, with deliveries set to start in nine months, ministry spokesman Arsenio Andolong told AFP.
The Filipino military also uses derivations of the Bell-UH-1H helicopter, which first saw service for the USA military in the Vietnam War in the early 1960s.
Gen. Restituto Padilla, chief of plans at the Armed Forces of the Philippines (AFP), said the helicopters would be used for internal security operations apart from deployment in search-and-rescue and disaster relief missions. But Philippine Defense Secretary Delfin Lorenzana clarified on Thursday that the helicopters made by Bell Helicopter, a Textron Inc. company, will be used for humanitarian operations.
Duterte, however, reasoned the equipment would "invariably" be used against rebels and terrorists. "And we will obviously review the facts and take the right decision", Champagne told reporters, without giving more details.
They accuse President Rodrigo Duterte of human rights abuses and carrying out unlawful killings amid his anti-drug campaign.
NDP foreign affairs critic Helene Laverdiere has added her voice to the chorus of concern, writing on Twitter: "How can Trudeau justify this deal with the Philippines when Duterte's government has plunged the country into a bad human rights crisis?"
Trudeau, who raised human rights concerns to President Rodrigo Duterte previous year, replied: "Absolutely".
He added that the Canadian government will make sure any deal entered into by the their government are "abiding by the rules and expectations that are not just values, but actual rules that the Canadian government has to follow". "And we want the government to look into that to see if the helicopters are indeed being used in combat that are harming and killing civilians".
"They are not attack or close support aircraft", he said.
The Philippine government says police only shot the suspects in self-defence and rejects human rights monitors' description of the crackdown as a crime against humanity.