DUBLIN (Reuters) - Delays in deliveries from major aircraft manufacturers are in some cases getting worse, and estimates of delay time can not be trusted, Steven Udvar-Hazy, the executive chairman of Air Lease Corp ( AL ) said on Monday.

"Supply chain bottlenecks, OEM delays .. in some cases, are getting worse," Udvar-Hazy told the Airline Economics conference, using the term Original Equipment Manufacturer, which is used to refer to large manufacturers such as Boeing ( BA ) and Airbus.

"You can't trust those notices," he said of delay notices from aircraft manufacturers are systematically extended.