# NTSB UNK64X3857: Boeing B75N1, N60955, Olyphant, AR, September 7, 1964

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 7, 1964
- Place: Olyphant, AR · OLYPHANT, AR
- Location: 35.5245° N, 91.3824° W: Placed by OpenAirDocs: center of Olyphant, AR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.5245&lon=-91.3824&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report November 9, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 182101
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X3857
- Page: https://openairdocs.org/ntsb/UNK64X3857

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2820   64/9/7    OLYPHANT ARK        BOEING B75N1        CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 32, 1200
        TIME - 1800                    N60955              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 250 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - WILMANS STRIP
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (OWNER PERSONNEL)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (OWNER-PILOT)
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -  600                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - OTHER                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  ELEVATION-AREA BEING TREATED-FEET -  250
        REMARKS- SPARK PLUGS FIRED INTERMITTENTLY WHEN SUBJECTED TO OVER 40 PSI PRESSURE.
```

## Aircraft

- Registration: [N60955](https://openairdocs.org/aircraft/N60955), registered now, S/N 75-1265, built 1941 (OpenAirDocs)
- Reported make and model: BOEING B75N1
- Registry model: [Boeing B75N1](https://openairdocs.org/model/boeing-b75n1) (registry code 1380144) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Wilmans Strip

## Other investigations on N60955 (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 CEN19LA158](https://openairdocs.org/ntsb/CEN19LA158), May 29, 2019: Boeing B75N1 (N60955), Fredericksburg, TX, substantial damage. Probable cause: The loss of engine power for undetermined reasons.

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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