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In a blow for Boeing, Indonesia's flag carrier is seeking the cancellation of a multibillion dollar order for 49 of the manufacturer's 737 Max 8 jets, citing a loss of confidence after two crashes in the past six months.

It is the first announcement of a cancellation since Boeing's new model aircraft were grounded following fatal crashes in Indonesia and Ethiopia.

PT Garuda Indonesia, which had ordered 50 Max 8 jets in 2014 and had received just one plane last year, has sent a letter to Boeing last week requesting to cancel the order worth $4.9 billion, the company's spokesman Ikhsan Rosan said Friday. The carrier has so far paid Boeing about $26 million for the order.

Garuda joined other airlines worldwide in grounding its one Max 8 jet after the crash of an Ethiopian Airlines flight this month which killed all 157 people aboard. It came less than five months after 189 people died in the Oct. 29 crash of another Max 8, operated by Indonesian private carrier Lion Air.

"Passengers always ask what type of plane they will fly as they have lost trust and confidence in the Max 8 jet," Rosan told The Associated Press, "This would harm our business."

He said that Garuda plans to meet with Boeing representatives next week in Jakarta to discuss details of cancelling the order.

"We don't want to use Max jets ... but maybe will consider switching it with another Boeing model of plane," Rosan said. He said Indonesian passengers are afraid to take flights using any Max model, whether it's the 8, 9 or 10 series.

A preliminary report from Indonesia's National Transportation Safety Committee in December stopped short of declaring a probable cause of the Oct. 29 crash.

Officials have provided scant details since then, saying they are still analyzing data from a cockpit voice recorder that was only recovered from the sea in January.