What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Departed klar runway 21 at 7:21 MDT, climbed on course to 8,500 MSL and leveled off. Set engines manifold pressure and RPM to cruise power.
Began fuel mixture leaning procedure for cruise power using EGT computer.
Felt vibration and fluttering and noise similar to elevator/ aileron flutter, or cargo door open or gear door loose. Slowed aircraft and began to troubleshoot problem. Advised Laramie UNICOM of unknown problem and turned back towards airport. Advance throttles to take off power, no response from engines, checked fuel valves for main on position, switch boost pumps from low for takeoff, to high boost. Still no response from engines. Lost altitude fast. Landed on belly gear up in field. Shut down electrical system and exited aircraft.
As the FAA filed it
DEPARTED KLAR RUNWAY 21 AT 7:21 MDT, CLIMBED ON COURSE TO 8,500 MSL AND LEVELED OFF. SET ENGINES MANIFOLD PRESSURE AND RPM TO CRUISE POWER.
BEGAN FUEL MIXTURE LEANING PROCEDURE FOR CRUISE POWER USING EGT COMPUTER.
FELT VIBRATION AND FLUTTERING AND NOISE SIMILAR TO ELEVATOR/ AILERON FLUTTER, OR CARGO DOOR OPEN OR GEAR DOOR LOOSE. SLOWED AIRCRAFT AND BEGAN TO TROUBLESHOOT PROBLEM. ADVISED LARAMIE UNICOM OF UNKNOWN PROBLEM AND TURNED BACK TOWARDS AIRPORT. ADVANCE THROTTLES TO TAKE OFF POWER, NO RESPONSE FROM ENGINES, CHECKED FUEL VALVES FOR MAIN ON POSITION, SWITCH BOOST PUMPS FROM LOW FOR TAKEOFF, TO HIGH BOOST. STILL NO RESPONSE FROM ENGINES. LOST ALTITUDE FAST. LANDED ON BELLY GEAR UP IN FIELD. SHUT DOWN ELECTRICAL SYSTEM AND EXITED AIRCRAFT.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.