Lockheed Martin and Pratt & Whitney will upgrade more than 900 F-35 fighters worldwide within 90 days

Lockheed Martin and Pratt & Whitney must modernize fifth-generation fighters within three months

F-35 Lightning II. It's part of an effort to fix an engine problem that halted plane deliveries nearly three months ago.

What is known

During one of the test flights of the F-35B inTexas in the engine there was a vibration. The pilot ejected, and the fighter, which was making a vertical landing, fell on the runway.

In February Pratt & Whitney announced thatshe managed to find and eliminate the cause of harmonic resonance, due to which the power plant could be destroyed. The United States Department of Defense has ordered engine upgrades in all F-35 Lightning II fighter jets around the world, even though most of the planes are not affected by the defect.

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The Pentagon wants all fighter jets to haveidentical configuration. The update process takes several hours. Vice President Pratt &amp; Whitney Jen Latka said the company will supply already "corrected" F135 engines.

In total, Lockheed Martin deliveredcustomers more than 890 aircraft. In addition, as of February 2023, the company has produced 17 more aircraft, which are awaiting testing before shipping to customers.