Burned PAK FA Bort 055
Interfaks-AVN reported yesterday that a PAK FA on a test flight from Zhukovskiy made an emergency landing.
A source told the military news agency that bort number 055 received “insignificant damage” from a fire that was quickly extinguished. The pilot was unhurt.
There are four flying T-50 or PAK FA prototypes at present, and two used for ground testing.
This wiki article on PAK FA lists the prototypes and when they first flew. T-50-5 or bort number 055 is the newest, making its initial flight on 27 October 2013.
AVN notes that the prototypes have performed aerial refueling and are working through various supermaneuvers.
Russian Defense Policy 
CAST adds that the ill-fated flight turned out to be a demonstration for a visiting Indian delegation (http://bmpd.livejournal.com/883088.html).