What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot was flying aircraft with jumpers and at 9000 feet he noticed engine was running rough. All jumpers bailed out at 9000 feet, no problems noted. Aircraft descended to a lower altitude and engine preceded to smooth out. Pilot suspected that ice had formed on the carburator, mixture was adjusted. Aircraft landed with no further problem. Operations check was performed with no defect noted. Aircraft back in service.
As the FAA filed it
(-23) PILOT WAS FLYING AIRCRAFT WITH JUMPERS AND AT 9000 FEET HE NOTICED ENGINE WAS RUNNING ROUGH. ALL JUMPERS BAILED OUT AT 9000 FEET, NO PROBLEMS NOTED. AIRCRAFT DESCENDED TO A LOWER ALTITUDE AND ENGINE PRECEDED TO SMOOTH OUT. PILOT SUSPECTED THAT ICE HAD FORMED ON THE CARBURATOR, MIXTURE WAS ADJUSTED. AIRCRAFT LANDED WITH NO FURTHER PROBLEM. OPERATIONS CHECK WAS PERFORMED WITH NO DEFECT NOTED. AIRCRAFT BACK IN SERVICE.