# NTSB OAK79DVA04: Thrush Cmdr S2R, N4002Q, Corcoran, CA, October 9, 1978

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: October 9, 1978
- Place: Corcoran, CA · CORCORAN, CA
- Location: 36.0840° N, 119.5612° W: Placed by OpenAirDocs: center of Corcoran, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.0840&lon=-119.5612&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report November 30, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 147558
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK79DVA04
- Page: https://openairdocs.org/ntsb/OAK79DVA04

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3012   78/10/9 NR.CORCORAN,CA        THRUSH CMDR S2R     CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 28, 3850
        TIME - 1130                    N4002Q              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 600 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         CORCORAN,CA                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: SWATH RUN
           COLLIDED WITH: DITCHES                                   LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: CRANKSHAFT
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1800                       KIND OF OPERATION - DEFOLIATION (LIQUID)
          KIND OF CROP - COTTON                                    TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT 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 -  165                 SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- ENG,S/N 87797,CRANKSHAFT SHEARED.
```

## Aircraft

- Registration: [N4002Q](https://openairdocs.org/aircraft/N4002Q), registered now, S/N 2477R, built 1978 (OpenAirDocs)
- Reported make and model: THRUSH CMDR S2R
- Registry model: [Ayres S-2R](https://openairdocs.org/model/ayres-s-2r) (registry code 0970101) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- 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 19781009031799A](https://openairdocs.org/incident/19781009031799A), Oct 9, 1978: Ayres S2B, Corcoran, CA, Substantial damage. Eng,s/n 87797,crankshaft sheared.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.