# NTSB DEN67F0023: Beech A23, N5778V, Boulder, CO, July 6, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 6, 1966
- Place: Boulder, CO · BOULDER, CO
- Location: 40.0244° N, 105.2513° W: Placed by OpenAirDocs: center of Boulder, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.0244&lon=-105.2513&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report August 15, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 122297
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN67F0023
- Page: https://openairdocs.org/ntsb/DEN67F0023

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4390   66/7/6    BOULDER,COLO        BEECH A23           CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 34, 101
        TIME - 0857                    N5778V              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 11 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: CLIMB TO CRUISE
           COLLIDED WITH: FENCE,FENCEPOSTS                          LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: BLADES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - PREVIOUS DAMAGE
           TERRAIN - HIGH OBSTRUCTIONS
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- PROP BLADE MODEL NO.1P235 FAILED. BLADE ACTUALLY 1B235 MODEL WITH IMPROPER MODEL NO. BLADE PITTED
```

## Aircraft

- Registration: [N5778V](https://openairdocs.org/aircraft/N5778V), registered now, S/N MA-37, built 1966 (OpenAirDocs)
- Reported make and model: BEECH A23
- Registry model: [Beech A23-24](https://openairdocs.org/model/beech-a23-24) (registry code 1151226) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: 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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