Many of these were improvements to electronics, structural strengthening, and projects to improve ease of maintenance.

That involves more structural strengthening, computer-operated secondary intakes, loss of some stealthiness.

This program of extensive structural strengthening, functional improvements, and conservation work essentially inserted a new building within the old.

The C7 also features the structural strengthening, improved handguards, and longer stock developed for the M16A2.

In 1975, this building was closed for structural strengthening and all classes moved to temporary bungalows.

Early accidents in use resulted in structural strengthening and modification to the production aircraft.

Other new features include raked wingtips, redesigned main landing gear, and additional structural strengthening.

Improved version of the Omega, with 261 kW engines and structural strengthening.

It was an afterthought, which required structural strengthening of the underpinnings of the west end.

The PA-18 was designed as a machine for the same market, but with a more powerful engine and structural strengthening.