An NMAC in the GFK vicinity was reported by the two pilots involved as well as the Tower Controller.
Synopsis
An NMAC in the GFK vicinity was reported by the two pilots involved as well as the Tower Controller.
Narrative
I was the Pilot in Command of a Cessna 172s; After a training flight with a student pilot working towards his private pilot's license. I was returning from the north east of the Grand Forks Airport; Approach had me enter through East Ponds and handed me off to Grand Forks Tower. Between East Ponds and Lagoon we descended from 2;200 to 1;500. Prior to reaching Lagoon a light twin reported a near miss with a 172; stating the 172 passed 200 FT below the light twin. The light twin was inbound to the airport from the north west; flying east at the time of the near miss. The light twin was given an altitude restriction of 2;100 FT before entering the traffic pattern; and was at 2;100 at the time of the near miss.As we were descending towards Lagoon; I was scanning out side; with the occasional glance inside at the ADS-B. The only traffic I ever saw was in the traffic pattern several miles from my location as we descended towards Lagoon. Upon reaching Lagoon Tower instructed me to fly west out side of the traffic pattern; along the north edge of Lagoon. Once we were abeam the Grand Forks passenger terminal Tower instructed me to make a 180 degree turn and enter into the traffic pattern following a light twin over the Domes. Once we made the turn I looked for the traffic and saw the light twin on short final. Upon landing and taxiing off the runway Tower asked me to call the phone number to the Tower once parked. Once I was out of the plane I called Tower [who stated he] felt that my aircraft could have possibly been close enough to the area to have caused the near miss. The sky was clear the visibility was unrestricted.
Second reporter narrative
Entered right downwind for VFR traffic pattern for 27R at GFK. Tower instructed us to stay at 2;100 FT MSL until advised. [We] maintained 2;100 FT MSL while entering the right downwind for 27R. Abeam the water treatment 'domes' facility Tower cleared us to land behind a Cessna 172 that was on a base leg for 27R.[We] verified that we were to cleared land behind the Cessna traffic [and] started a right turn for the right base leg for Runway 27R at 2;100 FT MSL. As we were rolling out of the turn my copilot saw a Cessna 172 pass underneath us; estimated at 150 FT vertical separation. Our flight was not advised by Tower of that airplane traffic.Tower sounded surprised that we almost had a possible mid-air collision when we advised them of the Cessna 172 that passed underneath us. That traffic also appeared to be going from the East Ponds to the Lagoons reporting point on a northwest heading. We landed without incident and advised Ground Control.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.