Brazil's Embraer SA , the world's third-largest commercial planemaker, cruises into the Paris air show with expectations mounting for the launch of its next generation of regional E-Jets, which have lifted its shares to near 5-year highs. Chief Executive Frederico Curado is likely to lay out plans on Monday for a re-engined commercial jet lineup entering service by 2018, analysts said. After two years of studies, the planemaker is poised to overhaul the E-Jets with new wings, upgraded avionics and geared turbo fan engines from Pratt & Whitney. The more efficient engines should help Embraer hold its recent leadership of the 70- to 120-seat segment, fending off new challengers like the Mitsubishi Regional Jet while keeping pressure on smaller versions of rival Bombardier's CSeries. The big question is whether Embraer has the orders to launch its new lineup with a splash. On Friday, the company announced the late addition of a second airshow press conference regard