# NTSB DEN67D0041: Piper PA-18, N4720A, Roset, WY, July 13, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 13, 1966
- Place: Roset, WY · ROSET, WY
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 9, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 121955
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN67D0041
- Page: https://openairdocs.org/ntsb/DEN67D0041

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1847  66/7/13    ROSET WYO           PIPER PA-18         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 43, 1500
        TIME - 1930                    N4720A              PX-  0  0  0  BUSINESS                  TOTAL HOURS, 1200 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           TAKEOFF: RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - SELECTED UNSUITABLE TERRAIN
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
```

## Aircraft

- Registration: [N4720A](https://openairdocs.org/aircraft/N4720A), registered now, S/N 18-4941, built 1956 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N4720A (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 DEN90LA123](https://openairdocs.org/ntsb/DEN90LA123), Jun 4, 1990: Piper PA-18-150 (N4720A), Douglas, WY, substantial damage. Probable cause: THE ACCIDENT TO BE IMPROPER INSTALLATION OF AILERON CONTROL SYSTEM BY MAINTENANCE PERSONNEL, AND FAILURE TO PERFORM AN AIRCRAFT PREFLIGHT BY THE PILOT IN COMMAND.

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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