Date: 202101
Local time of day: 1201-1800
Location: MRI.Airport, AK
Flight conditions: VMC
Weather elements / visibility: Turbulence; Windshear; 10
Light: Dusk
Aircraft: Small Aircraft; Low Wing; 2 Eng; Retractable Gear
Operator: FBO
Operating under: Part 91
Flight plan: IFR
Mission: Ferry / Re-Positioning; Other instructional
Flight phase: Landing
ATC / advisory: Tower MRI
Reporter organization: FBO
Reporter function: Captain; Pilot Flying; Single Pilot
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Commercial
Second reporter function: Instructor; Pilot Not Flying
Anomaly: Ground Event / Encounter Weather / Turbulence; Ground Event / Encounter Loss Of Aircraft Control; Ground Event / Encounter Ground Strike - Aircraft; Ground Excursion Runway
Detector: Person Flight Crew
When detected: Taxi
Result: Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification
Contributing factors: Weather
Primary problem: Weather

Narrative: After landing I maintained center line; braking action after landing I noticed was nil. The plane was near stopping and had started to veer to the right; at the time in which I input left rudder to counter the right turn and no avail the aircraft began to slide sideways. After attempts were made to completely stop; the engines were shut down to prevent further damage as it slid into the snowbank to which after coming to a complete stop; ATC was notified once we were allowed to exit the aircraft noticed the runway was icy.


Second narrative: Upon touchdown on runway 25 at Merrill airport it was very apparent that there was NIL braking action available. Tower informed us prior to landing that there was no braking action reports. As we were decelerating through approximately 35-40 knots ground speed; the student in the left seat (pilot flying) commented that we had no brakes. I immediately placed my feet on the rudder pedals with him and applied brakes. There was no braking available. I released pressure from the brakes to aid in steering and asked the student to cease braking. My intentions at this time was to allow the aircraft to decelerate using aerodynamic braking and roll to the end of the runway. Shortly thereafter the aircraft began a slide to the right. I immediately applied full left rudder without any action. I then applied left brake to aid in the directional control; which also did not assist. My last resort was to increase power on the right engine to attempt to correct the aircraft towards center line; but at this point the aircraft was too far gone in the slide. As it was apparent the aircraft was going to exit the runway I immediately pulled both mixtures to the idle cutoff position in an effort to stop the props from rotating and causing any damage. The aircraft ended up approximately 110 degrees rotated to the right of the center of the runway and the aircraft came to a rest approximately 5-10 feet off of the runway edge in approximately 6 inch deep snow. At this point I informed the tower of our position and we would need assistance to get the aircraft back on the runway. I called the owner of [the FBO and he was able to remove and tow the aircraft without further incident. After further inspection it was determined that there was absolutely no damage to the aircraft or any airport property; including the runway edge lights. The aircraft has since been turned over to Angel Aviation maintenance for further inspections.


Synopsis: Small aircraft flight crew reported braking action NIL on landing resulted in loss of control and runway excursion.