Indonesia's national airline is seeking the cancellation of a multibillion-pound order for 49 Boeing 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 ordered 50 Max 8 jets in 2014 and had received just one plane last year, sent a letter to Boeing last week requesting to cancel the order worth 4.9 billion dollars (£3.7 billion), the company's spokesman Ikhsan Rosan said.
The carrier has so far paid Boeing about £26 million (£19 million) for the order.
Garuda joined other airlines worldwide in grounding Max 8 jets 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 October 29 crash of another Max 8, operated by Indonesian private airline Lion Air.