# NTSB DEN68A0006: Bell 47G3B1, N1334X, Leadville, CO, July 22, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 22, 1967
- Place: Leadville, CO · LEADVILLE, CO
- Location: 39.2473° N, 106.2935° W: Placed by OpenAirDocs: center of Leadville, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.2473&lon=-106.2935&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 25, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 115823
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN68A0006
- Page: https://openairdocs.org/ntsb/DEN68A0006

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0424  67/7/22    LEADVILLE,COLO      BELL 47G3B1         CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0600                    N1334X              PX-  0  0  0  CONSTRUCTION              AGE 41, 3937 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            180 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: HOVERING
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- NO.2 CYL EXH VALVE FAILED.LYCOMING SERVICE BULLETIN 314 DTD JUN 23, 67 NOT COMPLIED WITH.
```

## Aircraft

- Registration: [N1334X](https://openairdocs.org/deregistered/N1334X-2003-03-19), registration cancelled 2003-03-19, S/N 6555, built 1965 (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 N1334X (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 ATL84FA001](https://openairdocs.org/ntsb/ATL84FA001), Oct 1, 1983: Bell 47G-3B1 (N1334X), Pliny, WV, destroyed, 1 fatal
- [NTSB DEN83LA154](https://openairdocs.org/ntsb/DEN83LA154), Jun 30, 1983: Bell 47G-3B-1 Soloy (N1334X), Townsend, MT, 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.

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