reprinting the LIVP report here.  Nice landing job!
 Anyone have more info on the nature of the engine failure?
I can't think of anything that howls besides the turbo.

Colyn
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NTSB Identification: SEA06LA074
14 CFR Part 91: General Aviation
Accident occurred Friday, April 14, 2006 in Belgrade, MT
Aircraft: Central Copters Lancair IV-P, registration: N671
Injuries: 3 Uninjured.

This is preliminary information, subject to change, and may contain errors.
Any errors in this report will be corrected when the final report has been
completed.

On April 14, 2006, approximately 2040 mountain daylight time, an
experimental Central Copters Lancair IV-P, N671, impacted the terrain during
an off-field forced landing about one and one-half mile northwest of the
approach end of runway 12 at Gallatin Field, Belgrade, Montana. The
commercial pilot and his two passengers were not injured, but the aircraft,
which was owned and operated by the pilot, was destroyed by the post-crash
fire. The 14 CFR Part 91 personal pleasure flight, which departed Spokane
International Airport, Spokane, Washington, about 90 minutes prior to the
accident, had been on an IFR flight plan, and was on a night visual approach
in visual meteorological conditions at the time of the power loss that lead
to the forced landing. There was no report of an ELT activation.

According to the pilot, when the aircraft was about three miles from the
approach end of the runway, the engine suddenly developed a loud howling
sound, the torque became very erratic, and the exhaust gas temperature (EGT)
exceeded its normal limits. Soon thereafter the engine lost all power, and
the pilot turned toward what appeared to be an open area in order to execute
a forced landing. Although the touchdown was successful, the aircraft
structure came in contact with the rough terrain during the landing roll,
and after it came to a stop, a small fire developed near the engine exhaust.
Although all occupants exited the aircraft without injury, they were unable
to extinguish the fire, which slowly spread, and ultimately consumed the
aircraft structure.