NTSB Identification: DEN85LA168.
The docket is stored on NTSB microfiche number 30196.
Accident occurred Tuesday, June 18, 1985 in GRAND FORKS, ND
Aircraft: HUGHES 269C, registration: N5203V
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.

ON JUNE 18, 1985, A STUDENT PLT AND HIS INSTRUCTOR WERE ON ALOCAL TNG FLT. PRIOR TO COMPLETING THE MISSION, THE INSTRUCTOR HAD HIS STUDENT EXECUTE A 180 DEGREE AUTOROTATION. DURING THE MANEUVER, THE MAIN ROTOR RPM WAS ALLOWED TO DECAY INTO THE CRITICAL RANGE WHICH RESULTED IN A HARD LANDING AND SUBSEQUENTLY DESTROYED THE HELICOPTER.

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

ROTOR RPM..NOT MAINTAINED..DUAL STUDENT

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

SUPERVISION..INADEQUATE..PILOT IN COMMAND(CFI)

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

AUTOROTATION..ATTEMPTED..DUAL STUDENT

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