part of a package of upgrades it plans to roll out later this year for the twin-engine helicopter. The upgraded Main Gearbox’s (MGB) major innovation is a new, redundant auxiliary lubrication ...

Sikorsky has revealed the first images of the Phase IV main gearbox (MGB) designed for the new S-92A+ helicopter, while insisting the update reflects the company’s long-term commitment both to ...

Sikorsky has unveiled its long-awaited S-92 Phase IV main gearbox with auxiliary oil lubrication for its twin-engine medium lift helicopter, parent company Lockheed Martin announced Tuesday.