What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
First flight of the day the pilot reported in his first attempt to start the engine he primed the engine one time and cranked the engine for 10 seconds. A second attempt was made to start the engine but it failed to start. He waited 10 seconds and then attempted a third start. Pilots from another aircraft that was taxing in front of him signaled that there was a fire. As he exited the aircraft to verify he could see fire under the engine. Another instructor quickly put the fire out with a fire extinguisher.
As the FAA filed it
FIRST FLIGHT OF THE DAY THE PILOT REPORTED IN HIS FIRST ATTEMPT TO START THE ENGINE HE PRIMED THE ENGINE ONE TIME AND CRANKED THE ENGINE FOR 10 SECONDS. A SECOND ATTEMPT WAS MADE TO START THE ENGINE BUT IT FAILED TO START. HE WAITED 10 SECONDS AND THEN ATTEMPTED A THIRD START. PILOTS FROM ANOTHER AIRCRAFT THAT WAS TAXING IN FRONT OF HIM SIGNALED THAT THERE WAS A FIRE. AS HE EXITED THE AIRCRAFT TO VERIFY HE COULD SEE FIRE UNDER THE ENGINE. ANOTHER INSTRUCTOR QUICKLY PUT THE FIRE OUT WITH A FIRE EXTINGUISHER.