The Australian head of the Joint Strike Fighter program says he is confident the next delivery of the cutting-edge combat aircraft to the RAAF is on track despite a report finding the next batch of planes will not all have the most up-to-date technology.

Air Vice-Marshal Leigh Gordon told Fairfax Media that doubts raised by the Pentagon's test and evaluation office about problems such as software glitches would not affect those due for delivery to the RAAF next year.

His comments follow the announcement of a Pentagon review of the Joint Strike Fighter, or F-35, after President Donald Trump used Twitter to blast the $520 billion program as "out of control". The price per plane has been falling.

A report released last month by the Director of Operational Test and Evaluation found that testing of the systems – including the all-important software – due to be installed on the next rollout of 90 planes is running about a year behind schedule and won't be finished until July next year.