# NTSB FTW72AF077: Bell 47G3B2, N2905W, Yukon, OK, May 15, 1972

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: May 15, 1972
- Place: Yukon, OK · YUKON, OK
- Location: 35.5184° N, 97.7662° W: Placed by OpenAirDocs: center of Yukon, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.5184&lon=-97.7662&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report November 2, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 165797
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW72AF077
- Page: https://openairdocs.org/ntsb/FTW72AF077

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0570  72/5/15    YUKON,OKLA          BELL 47G3B2         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1445                    N2905W              PX-  0  0  0  DUAL                      AGE 54, 9125 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            2175 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - CIMARRON
        DEPARTURE POINT             INTENDED DESTINATION
          OKLAHOMA CITY,OKLA          LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
           GEAR COLLAPSED                                           LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        FACTOR(S)
           WEATHER - OTHER
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      85
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          320                                                       6
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      VFR
        REMARKS- I/P DEMO,180DEG SIDE AUTOROTATION.WINDS LIGHT,VRBL.
```

## Aircraft

- Registration: [N2905W](https://openairdocs.org/deregistered/N2905W-2013-08-08), registration cancelled 2013-08-08, S/N 6820, built 1971 (OpenAirDocs)
- Reported make and model: BELL 47G3B2
- Registry model: [Bell 47G-3B-2](https://openairdocs.org/model/bell-47g-3b-2) (registry code 1181029) (OpenAirDocs)
- Registry engine: [Lycoming TVO-435-GIA](https://openairdocs.org/engine/lycoming-tvo-435-gia) (registry code 41526, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Cimarron

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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