NTSB Identification: LAX92LA303
Accident occurred Saturday, July 18, 1992 in SIMI VALLEY, CA
Probable Cause Approval Date: 09/28/1993
Aircraft: SCHWEIZER 269C, registration: N280CA
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE HELICOPTER INSTRUCTOR PILOT AND DUAL STUDENT WERE PRACTICING AUTOROTATIONS THAT WERE TERMINATED WITH POWER RECOVERIES AT A 3-FOOT HOVER. DURING THE SIXTH AUTOROTATIVE APPROACH THE ENGINE FAILED AND THE HELICOPTER LANDED HARD. THE HARD LANDING SUBSTANTIALLY DAMAGED THE HELICOPTER. AN ENGINE OPERATIONAL TEST AFTER THE ACCIDENT DISCLOSED THAT THE ENGINE WOULD NOT OPERATE AT IDLE RPM. THE CFI HAD LOGGED 154 TOTAL HELICOPTER FLIGHT HOURS OF WHICH 9 HOURS WERE IN THE ACCIDENT HELICOPTER MAKE AND MODEL. HE HAD ALSO GIVEN 20 HOURS OF HELICOPTER FLIGHT INSTRUCTION.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE COMPANY'S MAINTENACE PERSONNEL IMPROPER ADJUSTMENT OF THE AIRCRAFT'S IDLE RPM AND THE FAILURE OF THE INSTRUCTOR PILOT TO MAINTAIN ADEQUATE ROTOR RPM AFTER THE ENGINE FAILED. THE INSTRUCTOR PILOT'S LACK OF TOTAL EXPERIENCE IN TYPE OF OPERATION IS A FACTOR IN THE ACCIDENT.

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