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U.S. govt clears F-35 engine deliveries after safety concerns addressed



© Reuters. FILE PHOTO: A formation of U.S. Air Force F-35 Lightning II fighter jets perform aerial maneuvers during as part of a combat power exercise over Utah Test and Training Range, Utah, U.S. November 19, 2018. Picture taken November 19, 2018. U.S. Air Force/St

(Reuters) – Raytheon Technologies (NYSE:) Corp said on Friday the U.S. government has cleared its Pratt and Whitney unit to resume deliveries of its F-135 engine for the F-35 fighter jet, after a halt was put in place in December following the discovery of a safety concern.

The F-35 Joint Program Office said in a statement its engineers worked alongside Pratt & Whitney and Lockheed Martin (NYSE:) to develop “mitigations for a rare system phenomenon involving harmonic resonance to develop a path forward for safe operation of the F135 in flight”.

“The actions the government and industry team are taking will ensure incorporation of mitigation measures that will fully address/resolve this rare phenomenon in impacted F135 engines,” it added.

The JPO also said the government was working on drawing up instructions for safely resuming flight operations for impacted and new production aircraft.

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