PC-12
Flight Crew Instrument; Flight Crew Commercial
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Loss Of Aircraft Control
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Regained Aircraft Control; Flight Crew Diverted; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
On [Date]; we were scheduled to fly [Aircraft X] out of ZZZZ to ZZZZ1 at XA:00 local time. While en cruise; my Captain noticed the rudder pedals on the pilot side didn't mobilize as they should when pressed on. My Captain requested for me to step on the rudder pedals to see if I could notice any anomalies with the brakes on the Pilot Monitoring side. I did not notice anything unusual about the rudder pedals. We then proceeded to set up for the approach at ZZZZ1. We did a approach and landed on the runway and on the rollout I noticed that we were not slowing down like we should; the plane seemed to stutter (as if the brakes were engaging and then disengaging) The Captain then performed a go around. After the go around we both agree that we are in a position to safely try again. This time we come in a little bit slower and once again on the roll out my Captain was pressing the brakes and we were not decelerating as normal. After the second go around we both agree our best option is to divert to ZZZZ2 where there is a significantly longer runway. We land at ZZZZ2 without incident and deplane the passengers.
First Officer reported degraded braking action and two rejected landings forced a diversion to a successful precautionary landing.