# NTSB LAX68F0159: Cessna 310, N3681D, Ontario, CA, October 5, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 5, 1967
- Place: Ontario, CA · ONTARIO, CA
- Location: 34.0633° N, 117.6509° W: Placed by OpenAirDocs: center of Ontario, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.0633&lon=-117.6509&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 26, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 113867
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX68F0159
- Page: https://openairdocs.org/ntsb/LAX68F0159

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3603   67/10/5   ONTARIO,CALIF       CESSNA 310          CR-  0  0  1  INSTRUCTIONAL             PRIVATE, AGE 46, 178
        TIME - 1415                    N3681D              PX-  0  0  0  SOLO                      TOTAL HOURS, 8 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ONTARIO INTL.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER LEVEL OFF
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PERSONNEL - FLIGHT INSTRUCTOR: INADEQUATE SUPERVISION OF FLIGHT
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  DOOR/PANEL OPEN
        REMARKS- INSTRUCTOR FAILED TO SECURE DOOR. PILOT FAILED TO CHECK DOOR CLOSED AND LATCHED.
```

## Aircraft

- Registration: [N3681D](https://openairdocs.org/aircraft/N3681D), registered now, S/N 35381, built 1956 (OpenAirDocs)
- Reported make and model: CESSNA 310
- Registry model: [Cessna 310](https://openairdocs.org/model/cessna-310) (registry code 2074202) (OpenAirDocs)
- Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ontario Intl.

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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