Continental Motors is working with the FAA to dispel what they see as confusion and unnecessary concern about a mandatory service bulletin (MSB) issued by Continental Motors in early 2017 for a camshaft gear found mostly in older IO-520 and IO-550 engines. Several GA groups, including AOPA, the American Bonanza Society, COPA, Twin Cessna Flyer, and Savvy Aviation were sufficiently exercised about MSB05-08B that they requested an audience with the FAA without inviting anyone from Continental.
Source: avwebContinental Working With FAA On Cam Gear AD