# NTSB DEN70F0039: Boeing A-75, N57445, Buffalo, WY, May 8, 1969

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: May 8, 1969
- Place: Buffalo, WY · BUFFALO, WY
- Location: 44.3385° N, 106.7153° W: Placed by OpenAirDocs: center of Buffalo, WY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.3385&lon=-106.7153&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report August 25, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 176324
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN70F0039
- Page: https://openairdocs.org/ntsb/DEN70F0039

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1972   69/5/8    BUFFALO,WYO         BOEING A-75         CR-  0  1  0  COMMERCIAL                COMMERCIAL, AGE 40, 4000
        TIME - 0945                    N57445              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 1000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - RANCH STRIP
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           SYSTEMS - FLIGHT CONTROL SYSTEMS: ELEVATOR AND ELEVATOR TAB CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           INSTRUMENTS/EQUIPMENT AND ACCESSORIES - MISCELLANEOUS EQUIPMENT: SPRAY,DUSTING EQUIPMENT
           MISCELLANEOUS ACTS,CONDITIONS - UNAPPROVED MODIFICATION
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  PITCH CONTROL PROBLEM
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - TEST
          KIND OF CROP - OTHER                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - USED                                           CRASH HELMET - AVAILABLE-NOT USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT
        REMARKS- UNAPRVD SPRAY SYS MODIFICATN.ELEV CTL SYS DETERIORATD,MALFUNCTD.NO CTL OF ACFT AT LOW PWR SETTING.
```

## Aircraft

- Registration: [N57445](https://openairdocs.org/deregistered/N57445-2012-09-25), registration cancelled 2012-09-25, S/N 75-4283, built 1942 (OpenAirDocs)
- Reported make and model: BOEING A-75
- Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ranch Strip

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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