What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23)Mr. Grey cooper (pilot) and his son grey jr. had flown to Burlington, VT. (Btv) to pick-up another son, kevin cooper and two of his friends, milan flboda and will chang to transport them back to toronto, Canada (yyz). The fueler who had just filled all the aircraft tanks, witnesses the loading of the aircraft and stated their average weight to be approximately 200 pounds. They also had baggage. At 09:30 they departed runway 19 at btv. They were observed to use the entire runway (3611 ft), followed by a gradual turn to the left until they disappeared over some trees. The pilot reported the takeoff was relatively normal with an initial climb of approximately 500 feet per minute. After lift-off, the right engine manifold pressure decreased to about 34", while the left engine remained at 42". The climb rate decreased to 75 fpm and the airspeed was not increasing. The pilot then made his decision to land the aircraft in a field approximately 1/4 mile away and slightly to the left. He reduced flaps from 10 degrees to zero "to gain immediate airspeed which was required to maneuver aircraft over some trees and power lines". They landed hard on the partially extended landing gear, and slid to a stop in the open field. There was no fire and they immediately exited the aircraft. The pilot was injured and required assistance. He was transported to a local hospital where he was diagnosed to have a compressed #1 lumbar vertebra. The four younger men were not injured. The aircraft sustained structural damage: extensive belly damage, fuselage spilt open across top at aft end of cabin, both wings damaged-left wing severely buckled down just inboard of engine, all prop blades curled back and loose in hubs. There was no significant property damage to the scene. The on-scene operations inspector calculated the takeoff weight of the fully loaded aircraft to be approximately 6515 pounds. His calculation was done using conservative (light) weights. The flight manual shows the maximum gross weight to be 6200 pounds. The post-accident investigation revealed clamp on the flex duct between the right engine and turbo-compressor was sufficiently loose at allow significant leakage. A cold cylinder compression ckeck on the right engine showed the number 1 cylinder was 50/80, all the other right engine cylinders were normal (at least 70/80).
As the FAA filed it
(-23)MR. GREY COOPER (PILOT) AND HIS SON GREY JR. HAD FLOWN TO BURLINGTON, VT. (BTV) TO PICK-UP ANOTHER SON, KEVIN COOPER AND TWO OF HIS FRIENDS, MILAN FLBODA AND WILL CHANG TO TRANSPORT THEM BACK TO TORONTO, CANADA (YYZ). THE FUELER WHO HAD JUST FILLED ALL THE AIRCRAFT TANKS, WITNESSES THE LOADING OF THE AIRCRAFT AND STATED THEIR AVERAGE WEIGHT TO BE APPROXIMATELY 200 POUNDS. THEY ALSO HAD BAGGAGE. AT 09:30 THEY DEPARTED RUNWAY 19 AT BTV. THEY WERE OBSERVED TO USE THE ENTIRE RUNWAY (3611 FT), FOLLOWED BY A GRADUAL TURN TO THE LEFT UNTIL THEY DISAPPEARED OVER SOME TREES. THE PILOT REPORTED THE TAKEOFF WAS RELATIVELY NORMAL WITH AN INITIAL CLIMB OF APPROXIMATELY 500 FEET PER MINUTE. AFTER LIFT-OFF, THE RIGHT ENGINE MANIFOLD PRESSURE DECREASED TO ABOUT 34", WHILE THE LEFT ENGINE REMAINED AT 42". THE CLIMB RATE DECREASED TO 75 FPM AND THE AIRSPEED WAS NOT INCREASING. THE PILOT THEN MADE HIS DECISION TO LAND THE AIRCRAFT IN A FIELD APPROXIMATELY 1/4 MILE AWAY AND SLIGHTLY TO THE LEFT. HE REDUCED FLAPS FROM 10 DEGREES TO ZERO "TO GAIN IMMEDIATE AIRSPEED WHICH WAS REQUIRED TO MANEUVER AIRCRAFT OVER SOME TREES AND POWER LINES". THEY LANDED HARD ON THE PARTIALLY EXTENDED LANDING GEAR, AND SLID TO A STOP IN THE OPEN FIELD. THERE WAS NO FIRE AND THEY IMMEDIATELY EXITED THE AIRCRAFT. THE PILOT WAS INJURED AND REQUIRED ASSISTANCE. HE WAS TRANSPORTED TO A LOCAL HOSPITAL WHERE HE WAS DIAGNOSED TO HAVE A COMPRESSED #1 LUMBAR VERTEBRA. THE FOUR YOUNGER MEN WERE NOT INJURED. THE AIRCRAFT SUSTAINED STRUCTURAL DAMAGE: EXTENSIVE BELLY DAMAGE, FUSELAGE SPILT OPEN ACROSS TOP AT AFT END OF CABIN, BOTH WINGS DAMAGED-LEFT WING SEVERELY BUCKLED DOWN JUST INBOARD OF ENGINE, ALL PROP BLADES CURLED BACK AND LOOSE IN HUBS. THERE WAS NO SIGNIFICANT PROPERTY DAMAGE TO THE SCENE.THE ON-SCENE OPERATIONS INSPECTOR CALCULATED THE TAKEOFF WEIGHT OF THE FULLY LOADED AIRCRAFT TO BE APPROXIMATELY 6515 POUNDS. HIS CALCULATION WAS DONE USING CONSERVATIVE (LIGHT) WEIGHTS. THE FLIGHT MANUAL SHOWS THE MAXIMUM GROSS WEIGHT TO BE 6200 POUNDS. THE POST-ACCIDENT INVESTIGATION REVEALED CLAMP ON THE FLEX DUCT BETWEEN THE RIGHT ENGINE AND TURBO-COMPRESSOR WAS SUFFICIENTLY LOOSE AT ALLOW SIGNIFICANT LEAKAGE. A COLD CYLINDER COMPRESSION CKECK ON THE RIGHT ENGINE SHOWED THE NUMBER 1 CYLINDER WAS 50/80, ALL THE OTHER RIGHT ENGINE CYLINDERS WERE NORMAL (AT LEAST 70/80).