# NTSB SEA67A0043: Brantly B-2B, N2183U, Wyola, MT, December 18, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 18, 1966
- Place: Wyola, MT · WYOLA, MT
- Location: 45.1153° N, 107.3738° W: Placed by OpenAirDocs: center of Wyola, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.1153&lon=-107.3738&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 1, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 120090
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA67A0043
- Page: https://openairdocs.org/ntsb/SEA67A0043

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1074  66/12/18 NR.WYOLA MONT         BRANTLY B-2B        CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 37, 1100
        TIME - 1615                    N2183U              PX-  0  0  1  BUSINESS                  TOTAL HOURS, 350 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        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                                                      50
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          270                                                       5
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- DURING LOW HOVER OVER SLOPING TERRAIN WIND SUDDENLY DIMINISHED AND ACFT DROPPED TO GROUND.
```

## Aircraft

- Registration: [N2183U](https://openairdocs.org/deregistered/N2183U-2017-04-07), registration cancelled 2017-04-07, S/N 345, built 1963 (OpenAirDocs)
- Reported make and model: BRANTLY B-2B
- Registry model: [Brantly B-2B](https://openairdocs.org/model/brantly-b-2b) (registry code 1440506) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N2183U (3)

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 ATL06LA059](https://openairdocs.org/ntsb/ATL06LA059), Apr 2, 2006: Brantly Helicopter B2B (N2183U), Cullman, AL, destroyed. Probable cause: The pilot's failure to maintain a visual look out while maneuvering resulting in an in-flight collision with wires and the ground. A factor in the accident was the pilot's lack of recent experience…
- [NTSB ANC79DAG78](https://openairdocs.org/ntsb/ANC79DAG78), Aug 13, 1979: Brantly B-2B (N2183U), Wasilla, AK, substantial damage
- [NTSB CHI77FEE40](https://openairdocs.org/ntsb/CHI77FEE40), Jul 15, 1977: Brantly B2B (N2183U), Ringwood, IL, 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.