What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The aircraft departed topeka,KS with destination of claremore,OK. Approximately 40 minutes after departure at an altitude of 2000 MSL, the pilot heard the low rotor RPM horn and noticed an nf and nr droop. Pilot lowered the collective and came aft on the cyclic and stablized the rotor RPM. The pilot searched for a site to land and made a right turn to an open field. While making approach to the open field the pilot reported that the main rotor RPM level continued to drop which forced an autorotation, resulting in the aircraft landing in an residential neighborhood short of the selected landing site.
As the FAA filed it
THE AIRCRAFT DEPARTED TOPEKA,KS WITH DESTINATION OF CLAREMORE,OK. APPROXIMATELY 40 MINUTES AFTER DEPARTURE AT AN ALTITUDE OF 2000 MSL, THE PILOT HEARD THE LOW ROTOR RPM HORN AND NOTICED AN NF AND NR DROOP. PILOT LOWERED THE COLLECTIVE AND CAME AFT ON THE CYCLIC AND STABLIZED THE ROTOR RPM. THE PILOT SEARCHED FOR A SITE TO LAND AND MADE A RIGHT TURN TO AN OPEN FIELD. WHILE MAKING APPROACH TO THE OPEN FIELD THE PILOT REPORTED THAT THE MAIN ROTOR RPM LEVEL CONTINUED TO DROP WHICH FORCED AN AUTOROTATION, RESULTING IN THE AIRCRAFT LANDING IN AN RESIDENTIAL NEIGHBORHOOD SHORT OF THE SELECTED LANDING SITE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.