# NTSB UNK64X2099: Navion NAV4, N31U, Santa Ynez, CA, June 4, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 4, 1964
- Place: Santa Ynez, CA · SANTA YNEZ, CA
- Location: 34.6175° N, 120.0964° W: Placed by OpenAirDocs: center of Santa Ynez, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.6175&lon=-120.0964&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 22, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 182841
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X2099
- Page: https://openairdocs.org/ntsb/UNK64X2099

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1802   64/6/4    SANTA YNEZ CALIF    NAVION NAV4         CR-  0  0  1  NONCOMMERCIAL             STUDENT, AGE 52, 43 TOTAL
        TIME - 1830                    N31U                PX-  0  0  0  PLEASURE/PERSONAL TRANSP  HOURS, ALL IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - SANTA YNEZ
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
```

## Aircraft

- Registration: [N31U](https://openairdocs.org/deregistered/N31U-2012-09-25), registration cancelled 2012-09-25, S/N NAV-4-2100B, built 1950 (OpenAirDocs)
- Reported make and model: NAVION NAV4
- Registry model: [Ryan NAVION B](https://openairdocs.org/model/ryan-navion-b) (registry code 6150170) (OpenAirDocs)
- Registry engine: [Lycoming GO-480 series](https://openairdocs.org/engine/lycoming-go-480-series) (registry code 41527, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Santa Ynez

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.