# NTSB CHI74DEP13: Bolkow 150FF, N209AJ, Bristol, WI, August 20, 1973

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: August 20, 1973
- Place: Bristol, WI · BRISTOL, WI
- Location: 42.5589° N, 88.0492° W: Placed by OpenAirDocs: center of Bristol, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.5589&lon=-88.0492&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report September 28, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189304
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74DEP13
- Page: https://openairdocs.org/ntsb/CHI74DEP13

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2340  73/8/20    BRISTOL,WIS         BOLKOW 150FF        CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 36, 458
        TIME - 1630                    N209AJ              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 58 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - PRIVATE STRIP
        DEPARTURE POINT             INTENDED DESTINATION
          CHICAGO,ILL                 BRISTOL,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           COLLIDED WITH: CROP                                      LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
           PILOT IN COMMAND - IMPROPER OPERATION OF BRAKES AND/OR FLIGHT CONTROLS
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
           TERRAIN - HIGH VEGETATION
        WEATHER BRIEFING - UNKNOWN/NOT REPORTED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        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                  RELATIVE BEARING OF WIND
          NONE                                                     LEFT CROSS WIND 248-292 DEGREES
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          360                                                       15
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- LNDD DRIFTING APPLIED BRAKES SKIDDED ON THE SOD WITH WHEELS LOCKED.WING TIP CAUGHT SOYBEANS.
```

## Aircraft

- Registration: N209AJ (not matched to a registry record)
- Reported make and model: BOLKOW 150FF
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Private Strip

## 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 19730820026569A](https://openairdocs.org/incident/19730820026569A), Aug 20, 1973: Bolkms BO209150FF, Bristol, WI, Substantial damage. Lndd drifting applied brakes skidded on the sod with wheels locked. Wing tip caught soybeans.

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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