FARNBOROUGH, England, July 22 (Reuters) - Turkish

Airlines won't announce a plane order at this week's

Farnborough Airshow, with a deal for narrowbody jets still held

up by negotiations over engines, Chairman Ahmet Bolat told

reporters at the show on Monday.

The airline had said last month it was advancing talks with

Boeing ( BA ) for 150 737 MAX narrowbody jets and 75 widebody

787 planes, but a final decision hinged on engine price

negotiations.

"We are not going to announce anything in Farnborough,"

Bolat said, adding he had discussions on Monday morning with

engine supplier GE.