Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Flight Instructor; Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 100; Flight Crew Total 730; Flight Crew Type 100
Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Issued Advisory / Alert; Flight Crew Returned To Clearance
Human Factors; Weather
Received a low altitude alert from Champaign Approach while on the RNAV 03 Approach into DNV. This event occurred while procedure turn inbound on the RNAV 03 approach. Indicated altitude read 2120 when [charted] altitude was 2;300. ATC reported a low altitude alert and immediately retracted the statement as we climbed back to 2;300.Cause of the deviation was due to light-moderate turbulence; IMC; and night conditions during a training flight. Aircraft consistently was experiencing up/down drafts +/- ~500 FMP.
GA instructor reported receiving a low altitude alert from ATC on the RNAV 03 approach to DNV airport.