A Sukhoi Superjet 100 (SSJ100) was damaged in a hard landing during winglet testing July 12 in Russia, manufacturer Sukhoi Civil Aircraft reported.

The right landing gear of the twinjet did not fully deploy as the pilot attempted to land at Gromov Flight Research Institute in Zhukovsky, Russia, following a winglet aerodynamics performance evaluation test flight. After “fuel depletion, the landing was performed safely to the prepared runway,” the manufacturer said.

There were no injuries among the three crew on board, consisting of a deputy chief test pilot, flight test engineer and certification officer. Sukhoi described damage to the aircraft as “insufficient” and said it would be repaired and returned to flight status. The accident is being investigated.

The accident aircraft—SSJ100 production number 95032—was manufactured in February 2013 and had accumulated 535 flight hours over 294 test flights, Sukhoi said.

In May, Sukhoi commemorated the 10th anniversary of the regional jet since the first SSJ100 prototype took flight on May 19, 2008 at Komsomolsk-on-Amur, Russia. Winglet flight-testing started late last year; the structures will help reduce fuel consumption “by at least 3%,” Sukhoi said.

Bill Carey, bill.carey@aviationweek.com