Stage 3 DC-8s approved

Miami-based Quiet Technology Venture (QTV) has received US certification of its Stage 3 hushkit for the McDonnell Douglas DC-8-50, powered by the short-duct Pratt &Whitney JT3D-3B. QTV plans to complete work on an increased-gross-weight version for DC-8-61s by year end. Approval of a Stage 3 hushkit for Boeing 707s and ...

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