The delivery difficulties are in particular with the supplier of fan blades.
No, as I've mentioned before, they have huge supply chain problems across
hundreds of suppliers, impacting
all engine deliveries.
Of course some of the suppliers are more critical / troublesome than others, but it's not just a matter of one supplier of fan blades.
From WSJ, June 2016:
United Technologies Chief Executive Gregory Hayes estimated that 44% of the company’s 1,600 suppliers—including the 500 to 600 who supply parts and materials for the engines themselves—weren’t meeting the company’s on-time delivery and quality control targets. “Forty-four percent is the challenge,” Mr. Hayes said. ...
Unlike previous generations of engines, 80% of parts for the geared turbofan will be made by entities other than Pratt and Whitney itself, then shipped and assembled in the company’s engine manufacturing centers in Connecticut, Florida, Canada and Germany.