Led by accelerating deliveries of the GEnx, GE Aviation is entering a critical “execution” phase, says President and CEO David Joyce.

With GEnx-powered Boeing 787s and 747-8s entering service more rapidly than expected, GE is in the midst of the fastest widebody ramp-up in its history. About 200 GEnx-1B 787 engines and -2B 747 powerplants are due for delivery in 2013, versus almost 150 this year and about 120 in 2011.

Collectively, the ramp-up is double that of the GE90-115B for the 777 and three times that of the CF6-80C2, says GEnx General Manager Chuck Nugent. The -1B is in initial service with Japan Airlines and will enter service in the coming months as GE-powered 787s are delivered to operators such as Qatar Airways, Air India, United Airlines and China Southern Airlines. A total of 88 -2Bs so far are in service on 747-8s and demonstrating 1% better-than-expected fuel burn. GE says Boeing is updating the aircraft’s performance specification to reflect the new figures.

Including spares, Nugent says about 1,300 GEnx engines are on order, with more expected in the coming months as the company competes with the Rolls-Royce Trent 1000 for placement on about 250 787s that do not have assigned powerplants.

Together with military and CFM56 engines, GE anticipates delivering 3,400 engines in 2012 of which 2,400 are commercial. Some 480 will be for widebody aircraft, double the rate seen in 2009. This also includes CF6-80 engines which Joyce says will continue in production through 2025.

The company expects to raise overall deliveries to 3,600 in 2013, of which 2,600 will be commercial. This tally includes an anticipated 564 widebody engines.

Building on the growing fleet of CFM56, GE and General Electric-Pratt & Whitney Engine Alliance GP7200s, the manufacturer expects the installed fleet to mushroom to 45,000 in 2020 from 25,000 today.