The new deputy head of the Pentagon’s F-35 Joint Strike Fighter program said his office’s relationship with plane manufacturer Lockheed Martin Corp. (LMT) is “the worst I’ve ever seen.”

Air Force Major General Christopher Bogdan, on the job five weeks as deputy program executive officer, fired an unusual public salvo at the world’s largest defense contractor for what he described as a poor partnership in managing the Pentagon’s most expensive weapons program.

The latest high-level Pentagon review of the trillion-dollar F-35 Joint Strike Fighter program did not go well for the Lockheed Martin-built JSF. But don’t tell the Air Force that. The flying branch is racing ahead with its own JSF training and evaluation, regardless of the Defense Department’s hang-ups.

Last week’s Defense Acquisition Board review by senior Pentagon officials was meant to approve a comprehensive plan for completing the stealthy jet’s more than decade-long test effort, but in a “very painful” four hours, the officials could not agree on the plan, Reuters reported.