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Air Force

As Safety Measure, F-35 Program Orders Fleet Retrofit to Mitigate ‘Harmonic Resonance’

Frank Wolfe Frank Wolfe
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As Safety Measure, F-35 Program Orders Fleet Retrofit to Mitigate ‘Harmonic Resonance’
Five F-35A Lightning II aircraft taxi across the flightline on Sept. 23 last year at Luke AFB, Ariz. As of last September, the base had 111 F-35s and 77 F-16s for training (U.S. Air Force Photo)

The F-35 Joint Program Office (JPO) has directed a fleetwide retrofit for Lockheed Martin [LMT] F-35As, Bs, and Cs to mitigate any future "harmonic resonance," which may increase stress on the fighter's Raytheon Technologies' [RTX] F135 engine. "While only a small number of aircraft were impacted by the 'harmonic resonance,' the plan is to retrofit the entire fleet, because the retrofit is inexpensive, non-intrusive and supports the JPO’s desire to maintain and manage a single configuration across the entire fleet,"…

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