GENEVA, Dec 10 (Reuters) - The head of the global

airline body IATA Wille Walsh voiced frustration at supply chain

bottlenecks on Tuesday, blaming aviation manufacturers for

failing to address them and warning that the industry would ramp

up pressure.

"We've been patient. We've given them time. I think our

patience has run out. The situation is unacceptable," the head

of the International Air Transport Association told reporters in

Geneva, saying suppliers were acting like "quasi-monopolies".

"I think we're going to have to ramp up the pressure and

maybe look for support to force key suppliers to get their act

together," he said.