NTSB Identification: MKC83FA073.
The docket is stored on NTSB microfiche number 21853.
Accident occurred Friday, February 25, 1983 in COUNCIL BLUFFS, IA
Aircraft: HUGHES TH-55A, registration: N1040S
Injuries: 1 Minor,1 Uninjured.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.THE STUDENT, WHO WAS A RATED HELICOPTER PLT, AND A HELICOPTER INSTRUCTOR (CFI) WERE ON A DUAL INSTRUCTIONAL FLT. AFTER TAKEOFF, THE AIRCREW REMAINED IN A RIGHT TRAFFIC PATTERN FOR RWY 13 , INTENDING FOR THE STUDENT TO MAKE A 180 DEG AUTOROTATION TO A PARALLEL TAXIWAY. THE STUDENT OVERSHOT THE AUTOROTATIVE TURN & THE CFI INSTRUCTED HIM TO CONTINUE THE APCH TO A GRASS AREA BETWEEN THE TAXIWAY & RWY. THE CFI REPORTED THAT THE TOUCHDOWN WAS SMOOTH WITH ZERO AIRSPEED. HOWEVER, THE HELICOPTER BEGAN VIBRATING & TURNED TO THE LEFT. REPORTEDLY, THE MAIN ROTOR BLADES HAD SEVERED THE TAIL BOOM.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:
DISTANCE..MISJUDGED..DUAL STUDENT
The National Transportation Safety Board determines the probable cause(s) of this accident to be:
ALTITUDE..MISJUDGED..DUAL STUDENT
The National Transportation Safety Board determines the probable cause(s) of this accident to be:
SUPERVISION..INADEQUATE..PILOT IN COMMAND(CFI)
Contributing Factors
EMERGENCY PROCEDURE..SIMULATED..PILOT IN COMMAND(CFI)
Contributing Factors
AUTOROTATION..PERFORMED..DUAL STUDENT
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