What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) While circling an automobile accident the helicopter lost power. The PIC stated that the low rotor speed horn sounded and caution light came on. The PIC also stated that he could hear the rotor speed start to decay. The PIC entered an autorotation to the ground with a light to moderate thump. The PIC and crew exited the aircraft. Upon exiting the PIC and crew noticed smoke and fire from the #1 engine.
As the FAA filed it
(-23) WHILE CIRCLING AN AUTOMOBILE ACCIDENT THE HELICOPTER LOST POWER. THE PIC STATED THAT THE LOW ROTOR SPEED HORN SOUNDED AND CAUTION LIGHT CAME ON. THE PIC ALSO STATED THAT HE COULD HEAR THE ROTOR SPEED START TO DECAY. THE PIC ENTERED AN AUTOROTATION TO THE GROUND WITH A LIGHT TO MODERATE THUMP. THE PIC AND CREW EXITED THE AIRCRAFT. UPON EXITING THE PIC AND CREW NOTICED SMOKE AND FIRE FROM THE #1 ENGINE.