SEA74DYA17

NTSB accident investigation · Bell 47G-3B · Twin Falls, ID · December 17, 1973

Accident · No injuriesClosed
Date
December 17, 1973
Place
Twin Falls, ID · TWIN FALLS, ID
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N8588FBell 47G-3B
Status
Completed · report February 13, 1974
Report
Brief approved by the director
FAA report
19731217038399A
Case key
187426

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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NTSB brief

NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.

----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4035  73/12/17   TWIN FALLS,ID       BELL 47G-3B         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1055                    N8588F              PX-  0  0  0  DUAL                      AGE 42, 4416 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1776 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - TWIN FALLS CITY
        DEPARTURE POINT             INTENDED DESTINATION
          TWIN FALLS,ID               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           DUAL STUDENT - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           DUAL STUDENT - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        REMARKS- STUD PRCTCNG PWR OFF AUTOROT. INSTR LVL HELO AFTCYCLIC,DID NOT CK RTR RPM. SURF SFT DRT,GRSS.

Aircraft

Registration
N8588F
Reported as
Bell 47G-3B
Category
Helicopter
Engine
reciprocating
Damage
Substantial damage
Airport
Twin Falls City

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.