# NTSB DEN77FA005: Bell B-212, N398EH, Casper, WY, October 17, 1976

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: October 17, 1976
- Place: Casper, WY · CASPER, WY
- Location: 42.8421° N, 106.3213° W: Placed by OpenAirDocs: center of Casper, WY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.8421&lon=-106.3213&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 2 minor
- Status: Completed, report March 30, 1977
- Report: Brief approved by the director
- Safety recommendations: Yes
- NTSB case key (mKey): 79427
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN77FA005
- Page: https://openairdocs.org/ntsb/DEN77FA005

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4036  76/10/17   CASPER,WY           BELL B-212          CR-  0  0  1  MISCELLANEOUS             AIRLINE TRANSPORT, AGE
        TIME - 1245                    N398EH              PX-  0  1  1  FERRY                     57, 16000 TOTAL HOURS, 30
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - NATRONA COUNTY
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          DENVER,CO                   BILLINGS,MONT                CASPER,WY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      LANDING: POWER-ON LANDING
           ROLL OVER                                                LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - RPM-UNCONTROLLABLE-OVERSPEED
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  DIRECTIONAL CONTROL PROBLEM
        REMARKS- INADVERTANT AND/OR UNRECOGNIZED ROTOR SYSTEM OVER SPEED. NO.4 TAIL ROTOR DRIVE SHFT CRIT. SPD. LOW
```

## Aircraft

- Registration: [N398EH](https://openairdocs.org/deregistered/N398EH-2015-04-10), registration cancelled 2015-04-10, S/N 30766, built 1976 (OpenAirDocs)
- Reported make and model: BELL B-212
- Registry model: [Bell Helicopter Textron 212](https://openairdocs.org/model/bell-helicopter-textron-212) (registry code 1182153) (OpenAirDocs)
- Registry engine: [Pratt & Whitney Canada PT6T-3](https://openairdocs.org/engine/pratt-whitney-canada-pt6t-3) (registry code 52102, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage
- Airport: Natrona County

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19761017042139A](https://openairdocs.org/incident/19761017042139A), Oct 17, 1976: Bell 212, Casper, WY, Substantial damage. Inadvertant and/or unrecognized rotor system over speed. No.4 tail rotor drive shft crit. Spd. Low

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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