What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
During an instructional flight the instructor did not confirm the landing gear had been extended for landing. During landing, the instructor pilot reported hearing a slight scraping noise, added full power, and climbed to pattern altitude. At this point it was apparent the landing gear had not been extended for that landing. The crew then extended the landing gear and made a normal landing. Upon inspection of the aircraft after landing, it was noted that both propellers had suffered tip damage to all four blades. The crew stated that they noticed a different sound when making the go around from the gear up approach and landing but noted the noise was not that noticeable and there was no noticeable vibration.
As the FAA filed it
DURING AN INSTRUCTIONAL FLIGHT THE INSTRUCTOR DID NOT CONFIRM THE LANDING GEAR HAD BEEN EXTENDED FOR LANDING. DURING LANDING, THE INSTRUCTOR PILOT REPORTED HEARING A SLIGHT SCRAPING NOISE, ADDED FULL POWER, AND CLIMBED TO PATTERN ALTITUDE. AT THIS POINT IT WAS APPARENT THE LANDING GEAR HAD NOT BEEN EXTENDED FOR THAT LANDING. THE CREW THEN EXTENDED THE LANDING GEAR AND MADE A NORMAL LANDING. UPON INSPECTION OF THE AIRCRAFT AFTER LANDING, IT WAS NOTED THAT BOTH PROPELLERS HAD SUFFERED TIP DAMAGE TO ALL FOUR BLADES. THE CREW STATED THAT THEY NOTICED A DIFFERENT SOUND WHEN MAKING THE GO AROUND FROM THE GEAR UP APPROACH AND LANDING BUT NOTED THE NOISE WAS NOT THAT NOTICEABLE AND THERE WAS NO NOTICEABLE VIBRATION.