The first Orlyonok was launched in the Volga river in Autumn 1973.
In October 1979 the Orlyonok entered service in the Soviet Navy, where one got lost
in a crash in 1992. Unfortunately the crew didn't survive the accident.
The last flight of the Orlyonok took place in October 1993.
Currently the remaining Orlyonoks are rusting and falling apart at their base,
Kaspiisk Naval Air Base, although this one is being restored in a Moscow amusement park.

This info from the net at; http://www.samolet.co.uk/orlyonok.html