Rusdi Kirana said a recent apology by Boeing over the 346 lives lost in the two disasters, firstly at Lion Air in October and then at Ethiopian Airlines last month, stood in contrast to what he viewed as hasty earlier criticism of his airplane's pilots.

In a telephone interview, he also accused Boeing of treating him as a "piggy bank". The Indonesian LCC has spent tens of billions of dollars on plane orders with Boeing to become one of Asia's largest budget carriers.

"They look down on my airline and my country even though relations are always handled in a proper way. They treat us as Third World," Kirana told Reuters. "They also look down on me. They look at me as their piggy bank," he said in his first interview since the Ethiopian crash.

The Indonesian entrepreneur is the figurehead for what is now one of the planemaker's largest customers with 187 jets on order and 200 already delivered. Lion Air threatened in December to ax those orders but has given no further update.

Boeing has embarked on a campaign following the two crashes to restore faith in its best-selling jet and pledged to remove any risk that anti-stall software, suspected of pushing the two planes downwards, could be activated by erroneous data.

In November, following an interim report on the Lion crash, it voiced questions over whether pilots had used correct procedures. Kirana said the contrasting reactions demonstrated that Boeing was taking fast-growing carriers such as his for granted.

"(They) cast blame for the first one and apologize after the second," he said.

In a statement to Reuters regarding the comments, Boeing Chief Executive Dennis Muilenburg said: "We remain heartbroken over the tragic loss of Lion Air Flight 610. We're sorry for the lives lost and deeply regret the devastating impact on the families, friends and colleagues of the passengers and crew."

"Rusdi Kirana has been a leader and a pioneer in Asian aviation," he said, adding that Kirana and his team "remain highly valued partners to Boeing".

REUTERS