# NTSB OAK76DVG21: Weatherly 201A, N1263W, Davis, CA, September 9, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 9, 1975
- Place: Davis, CA · DAVIS, CA
- Location: 38.5561° N, 121.7378° W: Placed by OpenAirDocs: center of Davis, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.5561&lon=-121.7378&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 30, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 150823
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK76DVG21
- Page: https://openairdocs.org/ntsb/OAK76DVG21

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2774   75/9/9    DAVIS,CA            WEATHERLY 201A      CR-  0  0  1  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 0930                    N1263W              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   53, 22900 TOTAL HOURS, 50
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - MEDLOCK FIELD
        DEPARTURE POINT             INTENDED DESTINATION
          DAVIS,CA                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           COLLIDED WITH: DITCHES                                   LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: BRAKING SYSTEM (NORMAL SYSTEM)
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - PRESSURE,NONE
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - TOMATOES                                  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
        REMARKS- R BRAKE MASTER CYL O RING FAILED
```

## Aircraft

- Registration: [N1263W](https://openairdocs.org/deregistered/N1263W-2006-08-18), registration cancelled 2006-08-18, S/N 617, built 1974 (OpenAirDocs)
- Reported make and model: WEATHERLY 201A
- 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: Medlock Field

## 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 19750909030429A](https://openairdocs.org/incident/19750909030429A), Sep 9, 1975: Wthrly 201A, Davis, CA, Substantial damage. R brake master cyl o ring failed

## Other investigations on N1263W (3)

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 CHI06CA162](https://openairdocs.org/ntsb/CHI06CA162), Jun 22, 2006: Weatherly 201B (N1263W), Bowbells, ND, substantial damage. Probable cause: The pilot's failure to maintain clearance to the rising terrain while maneuvering during the agricultural application flight. Contirbuting factors were the low altitude operation and the rising…
- [NTSB SEA85LA076](https://openairdocs.org/ntsb/SEA85LA076), Mar 15, 1985: Weatherly 201B (N1263W), Davenport, WA, substantial damage
- [NTSB OAK75DVG63](https://openairdocs.org/ntsb/OAK75DVG63), May 11, 1975: Weatherly 201B (N1263W), Woodland, CA, substantial damage

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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