As I remember it was a "flock" of MI-35's that flew in to refuel in Osubi and one took a shortcut from the taxiway to the ramp in Osubi, got stuck with a wheel in the storm drain and when trying to get out managed to roll the aircraft?
212man will be able to correct me if I'm wrong, he was around at that time as well.
Yes, it was the entire fleet of 6 that stopped by at Ray-FK International, on their way to NAF Base PH. I believe he was late to taxy and so took a short cut to try and catch up for departure. The irony was that most of us on first acquaintance with the new airport couldn't help but comment on the risk posed by the open drains surrounding the apron! The covers arrived soon after the incident. For years later, if you took a stroll around the grassy areas, after cutting, you could find pieces of 'shrapnel' lying around......