# NTSB DEN67A0021: Bell 47G3B1, N73982, Old Faithful, WY, September 15, 1966

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: September 15, 1966
- Place: Old Faithful, WY · OLD FAITHFUL, WY
- Phase of flight: [Emergency descent](https://openairdocs.org/ntsb-phases/600) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor
- Status: Completed, report May 5, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 121546
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN67A0021
- Page: https://openairdocs.org/ntsb/DEN67A0021

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0905  66/9/15    OLD FAITHFUL WYO    BELL 47G3B1         CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 34, 7500
        TIME - 1130                    N73982              PX-  0  1  0  SEARCH AND RESCUE         TOTAL HOURS, 2000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     IN FLIGHT: EMERGENCY DESCENT
        PROBABLE CAUSE(S)
           WEATHER - ICING CONDITIONS-INCLUDES SLEET,FREEZING RAIN,ETC.
           ROTORCRAFT - ROTOR ASSEMBLIES: MAIN ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - OUT OF BALANCE
           MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE
          ROTORCFT-LOSS OF LIFT DUE TO ICE ACCRETION.
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  PROP/ENGINE VIBRATION
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                  400
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          1 MILE OR LESS                                           SNOW
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          BLOWING SNOW                                              40
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
          CALM                                                     VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- US PARK SERV CONTRACT.SEARCH FOR SMOKE JUMPERS.
```

## Aircraft

- Registration: [N73982](https://openairdocs.org/deregistered/N73982-2013-05-07), registration cancelled 2013-05-07, S/N 2889, built 1963 (OpenAirDocs)
- Reported make and model: BELL 47G3B1
- Registry model: [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1) (registry code 1181028) (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

## Other investigations on N73982 (1)

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.

- [NTSB OAK65A0051](https://openairdocs.org/ntsb/OAK65A0051), Jan 7, 1965: Bell 47G3B1 (N73982), Yreka, CA, substantial damage

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.