# NTSB DEN71DXT09: K.Twister IMP, N5DF, Coalville, UT, September 13, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 13, 1970
- Place: Coalville, UT · COALVILLE, UT
- Location: 40.9074° N, 111.4212° W: Placed by OpenAirDocs: center of Coalville, UT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.9074&lon=-111.4212&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 28, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 145846
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN71DXT09
- Page: https://openairdocs.org/ntsb/DEN71DXT09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3772  70/9/13    COALVILLE,UT        K.TWISTER IMP       CR-  0  0  1  NONCOMMERCIAL             ATP,FLIGHT INSTR., AGE
        TIME - 1455                    N5DF                PX-  0  0  0  PLEASURE/PERSONAL TRANSP  46, 15356 TOTAL HOURS, 65
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          LARAMIE,WYO                 SALT LAKE CITY,UT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: OBJECT                                    TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - PILOT FATIGUE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- LNDD ON ROAD DUE OIL LEAK.DRG TKOF DRIFTED L,WING HIT ROAD MARKER,LNDD SLC.PLT FLEW 11HR LAST 24.
```

## Aircraft

- Registration: [N5DF](https://openairdocs.org/deregistered/N5DF-2012-12-18), registration cancelled 2012-12-18, S/N PD-1, built 1970 (OpenAirDocs)
- Reported make and model: K.TWISTER IMP
- Registry model: [Knight Twister RACER 1](https://openairdocs.org/model/knight-twister-racer-1) (registry code 497014P) (OpenAirDocs)
- Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: 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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