Flight Details
The purpose of the flight was instrument training. The pilot obtained a weather briefing and filed an IFR flight plan the evening before the flight; no further updated weather briefing was obtained.
Weather Conditions
Current AIRMETS called for, and pilot reports (PIREPs) reported, inflight icing for the route and destination. The airplane was neither de-icing nor anti-icing equipped.
Approach and Missed Approach
Just before the approach clearance was issued to the pilot, another aircraft on the same frequency was issued a PIREP for moderate icing. A VOR approach to the original destination was initiated. The cloud ceiling was 500 ft below the minimum descent altitude (MDA). A missed approach was executed.
Icing and Communication
The instructor radioed several times about encountering icing conditions and his inability to maintain altitude. ATC issued progressively lower altitudes, with a final emergency vectoring altitude of 2300 ft, based on their emergency obstruction video map (EVOM). Obstructions 2300 ft high were depicted in the area on the EOVM.
Impact
The airplane, with landing gear extended, impacted trees at 2000 ft elevation.