# NTSB FTW78FQG48: Snow S-2R, N4946X, Plainview, TX, August 21, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 21, 1978
- Place: Plainview, TX · PLAINVIEW, TX
- Location: 34.1911° N, 101.7235° W: Placed by OpenAirDocs: center of Plainview, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.1911&lon=-101.7235&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 25, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 139740
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW78FQG48
- Page: https://openairdocs.org/ntsb/FTW78FQG48

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2744  78/8/21    PLAINVIEW,TX        SNOW S-2R           CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE UNK/NR,
        TIME - 2000                    N4946X              PX-  0  0  0  FERRY                     3200 TOTAL HOURS, 350 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DIMMITT,TX                  BARWICE,TX
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: NORMAL CRUISE
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER SYSTEM: GOVERNOR
           MISCELLANEOUS ACTS,CONDITIONS - RPM-UNCONTROLLABLE-OVERSPEED
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER ALIGNMENT/ADJUSTMENT
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- PROP GOVERNOR,P/N 895286,HIGH SPEED STOP RESET IN FLT BY VIBRATION/FRICTION.
```

## Aircraft

- Registration: [N4946X](https://openairdocs.org/deregistered/N4946X-2018-01-08), registration cancelled 2018-01-08, S/N 5007R, built 1975 (OpenAirDocs)
- Reported make and model: SNOW S-2R
- Registry model: [Rockwell International S-2R](https://openairdocs.org/model/rockwell-international-s-2r) (registry code 7630202) (OpenAirDocs)
- Registry engine: [Wright C7BA series](https://openairdocs.org/engine/wright-c7ba-series) (registry code 67017, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: Substantial damage

## 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 19780821030879A](https://openairdocs.org/incident/19780821030879A), Aug 21, 1978: Ayres S2B, Plainview, TX, Substantial damage. Prop governor,p/n 895286,high speed stop reset in flt by vibratioiction.

## Other investigations on N4946X (2)

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 CEN13LA323](https://openairdocs.org/ntsb/CEN13LA323), Jun 1, 2013: Rockwell International S-2R (N4946X), Hamlin, TX, substantial damage. Probable cause: The pilot's decision to land the airplane with a crosswind that exceeded the airplane's capabilities.
- [NTSB DFW05CA189](https://openairdocs.org/ntsb/DFW05CA189), Jul 23, 2005: Rockwell International S-2R (N4946X), Hamlin, TX, substantial damage. Probable cause: The failure of the propeller blade seal resulting in an oil leak. Contributing factors were the limited forward visibility and lack of suitable terrain for the precautionary landing.

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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