The paper cited no sources for the information about the delivery schedule for the 787-9, which will seat 250 to 290 passengers. A Boeing spokeswoman said delivery for the plane was still on track for late 2013.
The 787-8, the first version of the Dreamliner with seating for 210 to 250 passengers, is set for first delivery in the third quarter of 2011.
The light-weight, carbon-composite plane is three years behind schedule due to snags in the complex global supply chain. Boeing has taken orders for 827 Dreamliners.
The world's second-largest commercial plane-maker now faces the task of getting the production rate for the plane up to 10 a month.
We doubt whether investors will be overly surprised by yet another setback on the 787, said Robert Stallard, an analyst with RBC Capital Markets, in a research note.
Nevertheless, the crystallization of these concerns is still likely to be unhelpful for investor sentiment he said.
Boeing is set to report second-quarter earnings on Wednesday.
(Reporting by Kyle Peterson, editing by Bernard Orr)