Mitsubishi Aircraft Corp., trying to keep its new regional jet on track after a series of delays, was forced to cancel a demo flight for the world¡¯s aerospace industry Tuesday after the jet was hit by a truck.

The collision, which follows the jet¡¯s debut at the show Monday, will not interrupt marketing efforts. But it will do nothing to help the Mitsubishi Regional Jet pull in orders at a time when giants Airbus SE and Boeing Co. are extending their grip to the smaller end of the market.

The 90-seat MRJ, Japan¡¯s great hope for reviving a dormant commercial aviation industry, was launched a decade ago. Five delays later, it is now expected to enter service with carrier ANA Holdings Inc. in 2020, compared with the initial target of 2013.