# NTSB SEA68A0021: Bell 47G3B1, N73916, West Glacier, MT, July 29, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 29, 1967
- Place: West Glacier, MT · WEST GLACIER, MT
- Location: 48.4958° N, 114.0020° W: Placed by OpenAirDocs: center of West Glacier, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=48.4958&lon=-114.0020&mi=10
- Phase of flight: [Emergency descent](https://openairdocs.org/ntsb-phases/600) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 12, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 115957
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA68A0021
- Page: https://openairdocs.org/ntsb/SEA68A0021

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0962  67/7/29  NR.WEST GLACIER,MONT  BELL 47G3B1         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 29, 2000
        TIME - 1015                    N73916              PX-  0  0  0  ASSOC FIRE CTL ACTIVITY   TOTAL HOURS, 400 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: AUTOROTATIVE DESCENT
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  PROP/ENGINE VIBRATION
        REMARKS- PLT FAILED TO CHECK SECURITY OF SIDE RACK CARGO.LOOSE WATERBAGS STRUCK TAIL ROTOR.
```

## Aircraft

- Registration: [N73916](https://openairdocs.org/deregistered/N73916-1988-11-23), registration cancelled 1988-11-23, S/N 2805 (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)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N73916 (2)

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 LAX87LA222](https://openairdocs.org/ntsb/LAX87LA222), Jun 2, 1987: Bell 47G-3B-1 (N73916), Payson, AZ, destroyed
- [NTSB SEA66A0072](https://openairdocs.org/ntsb/SEA66A0072), Jun 30, 1966: Bell 47G3B1 (N73916), Livingston, MT, destroyed

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.