# NTSB DEN77DTE07: Hughes 269C, N7457F, Two Buttes, CO, November 14, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 14, 1976
- Place: Two Buttes, CO · TWO BUTTES, CO
- Location: 37.5607° N, 102.3966° W: Placed by OpenAirDocs: center of Two Buttes, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.5607&lon=-102.3966&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 4, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 156240
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN77DTE07
- Page: https://openairdocs.org/ntsb/DEN77DTE07

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3639  76/11/14   TWO BUTTES,CO       HUGHES 269C         CR-  0  0  2  MISCELLANEOUS             COMMERCIAL, AGE 29, 5775
        TIME - 1530                    N7457F              PX-  0  0  0  HUNTING                   TOTAL HOURS, 87 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          TWO BUTTES,CO               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ROLL OVER                                                LANDING: ROLL-ON/RUN-ON
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
           MISCELLANEOUS ACTS,CONDITIONS - DISREGARD OF GOOD OPERATING PRACTICE
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
        FACTOR(S)
           TERRAIN - WET,SOFT GROUND
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  UNUSUAL NOISE
                                  PROP/ENGINE VIBRATION
        REMARKS- TUMBLEWEEDS CAUGHT IN TAIL ROTOR,CAUSED VIBRATION AND LOSS OF ROTOR RPM.
```

## Aircraft

- Registration: [N7457F](https://openairdocs.org/deregistered/N7457F-1977-09-01), registration cancelled 1977-09-01, S/N 660517, built 1976 (OpenAirDocs)
- Reported make and model: HUGHES 269C
- Registry model: [Hughes 269C](https://openairdocs.org/model/hughes-269c) (registry code 4470504) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## 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 19761114036689A](https://openairdocs.org/incident/19761114036689A), Nov 14, 1976: Hughes 269C, Two Buttes, CO, Substantial damage. Tumbleweeds caught in tail rotor,caused vibration and loss of rotor RPM.

## Other investigations on N7457F (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 DEN78FA017](https://openairdocs.org/ntsb/DEN78FA017), May 30, 1977: Hughes 269C (N7457F), Colorado Sprgs, CO, destroyed, 1 fatal

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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