Dash 8 Series Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Aircraft Equipment Problem Less Severe
Aircraft Equipment Problem Dissipated
Aircraft
During cruise flight the right Number 2 engine started to act abnormally. The Number 2 engine was lagging when I changed power settings and started to surge +/- 10%. After a couple of minutes it began to stabilize again. The CA called dispatch and maintenance and they agreed that if it started again we would [advise ATC]. During our approach the engine began to surge again and the CA [advised ATC] as a precaution.  We deemed it safest to keep the engine running for the approach and we made a safe landing.
[Report narrative contained no additional information.]
Dash 8 flight crew reported intermittent engine surging during cruise and approach.