# NTSB IAD78FLT07: Air Tractor AT301, N4422S, Ridgely, TN, July 18, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 18, 1978
- Place: Ridgely, TN · RIDGELY, TN
- Location: 36.2632° N, 89.4806° W: Placed by OpenAirDocs: center of Ridgely, TN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.2632&lon=-89.4806&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 6, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 140245
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD78FLT07
- Page: https://openairdocs.org/ntsb/IAD78FLT07

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2609  78/7/18    RIDGELY,TN          AIR TRACTOR AT301   CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 35, 1929
        TIME - 0930                    N4422S              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 312 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - RIDGELY
        DEPARTURE POINT             INTENDED DESTINATION
          RIDGELY,TN                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           AIRFRAME - LANDING GEAR: BRAKING SYSTEM (NORMAL SYSTEM)
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - BEANS                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT
        REMARKS- LEFT WHEEL BRAKE MASTER CYL FAILED
```

## Aircraft

- Registration: [N4422S](https://openairdocs.org/aircraft/N4422S), registered now, S/N 301-0082 (OpenAirDocs)
- Reported make and model: AIR TRACTOR AT301
- Registry model: [Air Tractor AT-301](https://openairdocs.org/model/air-tractor-at-301) (registry code 0390103) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ridgely

## 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 19780718019239A](https://openairdocs.org/incident/19780718019239A), Jul 18, 1978: Airtrc AT301, Ridgely, TN, Substantial damage. Left wheel brake master cyl failed

## Other investigations on N4422S (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 DEN06LA097](https://openairdocs.org/ntsb/DEN06LA097), Jul 13, 2006: Air Tractor AT-301 (N4422S), Holcomb, KS, substantial damage. Probable cause: the partial loss of engine power for undetermined reasons. A contributing factor was the lack of suitable terrain for the forced 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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