What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) No narrative (.19) on July 2, 2001, at 1426 hours pacific daylight time, a Robinson R22 beta, N4052K, made a hard landing and rolled over while making a landing approach at Hayward, California. The helicopter sustained substantial damage while the certified flight instructor and his certificated commercial pilot/flight instructor candidate received minor injuries. Sierra academy of aeronautics was operating the helicopter as an instructional flight under the provisions of 14 CFR part 91AT the time of the accident. The local flight departed oakland, California, earlier that day. Visual meteorological conditions prevailed at the time, and no flight plan had been filed. According to a federal aviation administration (FAA) inspector, the student was practicing a series of autorotations. During recovery, the student pulled collective pitch before rolling on the throttle. The student said the clutch did not engage properly, and the helicopter fell through, striking the tail boom on the ground. The main rotor then struck the ground, and the helicopter rolled over onto its right side. A postaccident run, conducted by the FAA I nspector, found the helicopter's engine started, accelerated, and maintained power with no reported anomalies.
As the FAA filed it
(-23) NO NARRATIVE (.19) ON JULY 2, 2001, AT 1426 HOURS PACIFIC DAYLIGHT TIME, A ROBINSON R22 BETA, N4052K, MADE A HARD LANDING AND ROLLED OVER WHILE MAKING A LANDING APPROACH AT HAYWARD, CALIFORNIA. THE HELICOPTER SUSTAINED SUBSTANTIAL DAMAGE WHILE THE CERTIFIED FLIGHT INSTRUCTOR AND HIS CERTIFICATED COMMERCIAL PILOT/FLIGHT INSTRUCTOR CANDIDATE RECEIVED MINOR INJURIES. SIERRA ACADEMY OF AERONAUTICS WAS OPERATING THE HELICOPTER AS AN INSTRUCTIONAL FLIGHT UNDER THE PROVISIONS OF 14 CFR PART 91AT THE TIME OF THE ACCIDENT. THE LOCAL FLIGHT DEPARTED OAKLAND, CALIFORNIA, EARLIER THAT DAY. VISUAL METEOROLOGICAL CONDITIONS PREVAILED AT THE TIME, AND NO FLIGHT PLAN HAD BEEN FILED. ACCORDING TO A FEDERAL AVIATION ADMINISTRATION (FAA) INSPECTOR, THE STUDENT WAS PRACTICING A SERIES OF AUTOROTATIONS. DURING RECOVERY, THE STUDENT PULLED COLLECTIVE PITCH BEFORE ROLLING ON THE THROTTLE. THE STUDENT SAID THE CLUTCH DID NOT ENGAGE PROPERLY, AND THE HELICOPTER FELL THROUGH, STRIKING THE TAIL BOOM ON THE GROUND. THE MAIN ROTOR THEN STRUCK THE GROUND, AND THE HELICOPTER ROLLED OVER ONTO ITS RIGHT SIDE. A POSTACCIDENT RUN, CONDUCTED BY THE FAA I NSPECTOR, FOUND THE HELICOPTER'S ENGINE STARTED, ACCELERATED, AND MAINTAINED POWER WITH NO REPORTED ANOMALIES.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.