# NTSB DEN81FTE71: Caldwell Folker, N10217, Broomfield, CO, September 17, 1981

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: September 17, 1981
- Place: Broomfield, CO · BROOMFIELD, CO
- Location: 39.9205° N, 105.0867° W: Placed by OpenAirDocs: center of Broomfield, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.9205&lon=-105.0867&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report March 4, 1982
- Report: Brief approved by the director
- NTSB case key (mKey): 123170
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN81FTE71
- Page: https://openairdocs.org/ntsb/DEN81FTE71

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3303  81/9/17    BROOMFIELD,CO       CALDWELL FOLKER     CR-  0  1  0  MISCELLANEOUS             ATP,FLIGHT INSTR., AGE
        TIME - 1500                    N10217              PX-  0  0  0  EXPERIMENTATION           53, 6658 TOTAL HOURS, 1
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - JEFFERSON COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
          BROOMFIELD,CO               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL: MUSH                                              TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: OTHER
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      57
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          350                                                       7
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
         FIRE AFTER IMPACT
        REMARKS- INSTD DIFF PROP AFTR MRGL PERF DRG 1ST FLT-DRG 2ND FLT UN CLIMB OR GAIN AIRSPEED.DA APRX 6200FT.
```

## Aircraft

- Registration: [N10217](https://openairdocs.org/deregistered/N10217-1984-10-26), registration cancelled 1984-10-26, S/N 1 (OpenAirDocs)
- Reported make and model: CALDWELL FOLKER
- Registry model: [Caldwell FOKKER TRI-PLANE](https://openairdocs.org/model/caldwell-fokker-tri-plane) (registry code 0562371) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed
- Airport: Jefferson 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 19810917064409A](https://openairdocs.org/incident/19810917064409A), Sep 17, 1981: Amtrrf FOKKERDR1, Broomfield, CO, Destroyed. Unable to climb on takeoff. Struck road embankment and burned. Was trying out new type of propeller.

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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