B767 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 160; Flight Crew Total 9500; Flight Crew Type 425
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Diverted
Aircraft
We were getting ready to coast out and crew change for the pilot flying break.  The captain noticed the ALT FLAP CONT circuit breaker was out on the overhead panel.  We looked at EICAS Status page and observed the aircraft right elevator indicator was varying about a chevron width and the left was steady.  We tried to contact Dispatch and [Maintenance] on SATCOM; but were unsuccessful.  We finally contacted them on HF.  We woke the other first officer and had him go to the back of the airplane.  He informed us that there was a noticeable pitching.  The Captain went to investigate and noticed the same pitching.  We discussed the problem within the flight deck; [Maintenance] and Dispatch and determined the safest course of action was to divert.  We started a shallow turn and descent towards [the nearest suitable airport].  We referenced the QRG diversion guide and completed all of the items listed.  We received the landing data from dispatch and through ACARS for Flap 30 and 25.  The Captain executed an uneventful flap 25 landing.  On post flight; the IRO first officer and I noticed aircraft right elevator was at full down deflection and the left elevator looked like it was drooped normally.
B767 First Officer reported noticing an elevator anomaly on an international flight that led the crew to divert to the nearest suitable airport.