# NTSB MIA73DLT13: Grumman G-164, N493Y, Wynnburg, TN, November 6, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 6, 1972
- Place: Wynnburg, TN · WYNNBURG, TN
- Location: 36.3300° N, 89.4686° W: Placed by OpenAirDocs: center of Wynnburg, TN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.3300&lon=-89.4686&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 29, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 169425
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA73DLT13
- Page: https://openairdocs.org/ntsb/MIA73DLT13

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3669   72/11/6   WYNNBURG,TENN       GRUMMAN G-164       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 39, 6500
        TIME - 1540                    N493Y               PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 600 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - PRIVATE STRIP
        DEPARTURE POINT             INTENDED DESTINATION
          WYNNBURG,TENN               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        FACTOR(S)
           WEATHER - THUNDERSTORM ACTIVITY
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  ADVERSE/UNFAVORABLE WEATHER
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     RAIN
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  WIND DIRECTION-DEGREES
          UNKNOWN/NOT REPORTED                                     255
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           8                                                       VFR
        TYPE OF FLIGHT PLAN
          NONE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 6000                       KIND OF OPERATION - DEFOLIATION (LIQUID)
          KIND OF CROP - COTTON                                    TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - USED
          GOGGLES - USED                                           CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  300                 SWATH RUN-HOW FLOWN - UNKNOWN/NOT REPORTED
        REMARKS- WIND GUSTS TO 45KTS IN TSTM ACTIVITY.ACFT VEERED INTO SOFT DITCH.
```

## Aircraft

- Registration: [N493Y](https://openairdocs.org/deregistered/N493Y-2009-04-15), registration cancelled 2009-04-15, S/N 137, built 1962 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164
- Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs)
- Registry engine: [Jacobs L4 /R755-7](https://openairdocs.org/engine/jacobs-l4-r755-7) (registry code 35003, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Private Strip

## Other investigations on N493Y (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 ATL07LA001](https://openairdocs.org/ntsb/ATL07LA001), Oct 4, 2006: Grumman G-164 (N493Y), Somerville, TN, destroyed. Probable cause: The total 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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