What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Aircraft had been worked on for the annual condition inspection. One of the fuel pumps had indication of rust deposits. This pump was removed and cleaned then reinstalled. The fuel injectors were removed, cleaned and reinstalled. The engine was run up and function checked a few times. The aircraft had 60 gallons of fresh fuel aboard. The engine was run up for two minutes and magneto and propeller operational checks performed. After takeoff the pilot climbed to about 200 feet and then noted the aircraft seemed to level off, and a short time later it started to slowly sink as the engine did not seem to be producing enough power for flight. The pilot elected to land in a field with the landing gear up. As they approached the field the right wing struck a fence post causing minimal damage. The aircraft slid to a stop and both occupants exited the aircraft with no injuries. The flight time was about two minutes. The aircraft was dismantled and moved back to the airport shop for further inspection.
As the FAA filed it
(-23) AIRCRAFT HAD BEEN WORKED ON FOR THE ANNUAL CONDITION INSPECTION. ONE OF THE FUEL PUMPS HAD INDICATION OF RUST DEPOSITS. THIS PUMP WAS REMOVED AND CLEANED THEN REINSTALLED. THE FUEL INJECTORS WERE REMOVED, CLEANED AND REINSTALLED. THE ENGINE WAS RUN UP AND FUNCTION CHECKED A FEW TIMES. THE AIRCRAFT HAD 60 GALLONS OF FRESH FUEL ABOARD. THE ENGINE WAS RUN UP FOR TWO MINUTES AND MAGNETO AND PROPELLER OPERATIONAL CHECKS PERFORMED. AFTER TAKEOFF THE PILOT CLIMBED TO ABOUT 200 FEET AND THEN NOTED THE AIRCRAFT SEEMED TO LEVEL OFF, AND A SHORT TIME LATER IT STARTED TO SLOWLY SINK AS THE ENGINE DID NOT SEEM TO BE PRODUCING ENOUGH POWER FOR FLIGHT. THE PILOT ELECTED TO LAND IN A FIELD WITH THE LANDING GEAR UP. AS THEY APPROACHED THE FIELD THE RIGHT WING STRUCK A FENCE POST CAUSING MINIMAL DAMAGE. THE AIRCRAFT SLID TO A STOP AND BOTH OCCUPANTS EXITED THE AIRCRAFT WITH NO INJURIES. THE FLIGHT TIME WAS ABOUT TWO MINUTES. THE AIRCRAFT WAS DISMANTLED AND MOVED BACK TO THE AIRPORT SHOP FOR FURTHER INSPECTION.