SIMI VALLEY, CA, USA
N280CA
SCHWEIZER 269C
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 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.
Source: NTSB Aviation Accident Database
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