# NTSB OAK77DVD22: Weatherly 201B, N1256W, Stockton, CA, March 18, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 18, 1977
- Place: Stockton, CA · STOCKTON, CA
- Location: 37.9577° N, 121.2908° W: Placed by OpenAirDocs: center of Stockton, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9577&lon=-121.2908&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 23, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 157288
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK77DVD22
- Page: https://openairdocs.org/ntsb/OAK77DVD22

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0607  77/3/18    STOCKTON,CA         WEATHERLY 201B      CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 59, 20000
        TIME - 0815                    N1256W              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 500 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - STOCKTON METRO
        DEPARTURE POINT             INTENDED DESTINATION
          STOCKTON,CA                  LOCAL
        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
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - GRAIN FIELDS                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          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- #1 REAR CYL SPARK PLUG INSULATOR FOUND CRACKED & LODGED BETWEEN CENTER ELECTRODE & BASE.
```

## Aircraft

- Registration: [N1256W](https://openairdocs.org/deregistered/N1256W-2004-11-29), registration cancelled 2004-11-29, S/N 610, built 1973 (OpenAirDocs)
- Reported make and model: WEATHERLY 201B
- Registry model: [Weatherly 201B](https://openairdocs.org/model/weatherly-201b) (registry code 9630408) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Stockton Metro

## 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 19770318007659A](https://openairdocs.org/incident/19770318007659A), Mar 18, 1977: Wthrly 201B, Stockton, CA, Substantial damage. #1 Rear cyl spark plug insulator found cracked & lodged between center electrode & base.

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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