# NTSB DEN73FTE20: Beech C-45H, N139V, Boulder, CO, August 20, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 20, 1972
- 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: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 7 uninjured
- Status: Completed, report April 4, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 168175
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN73FTE20
- Page: https://openairdocs.org/ntsb/DEN73FTE20

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3881  72/8/20    BOULDER,COLO        BEECH C-45H         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 46, 5350
        TIME - 0930                    N139V               PX-  0  0  6  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 8 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT -  BOULDER MUNI
        DEPARTURE POINT             INTENDED DESTINATION
          GRAND JUNCTION,COLO         BOULDER,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: ON GROUND                              LANDING: LEVEL OFF/TOUCHDOWN
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: MAIN GEAR-SHOCK ABSORBING ASSY,STRUTS,ATTACHMENTS,ETC.
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        REMARKS- LEFT MAIN GEAR COLLAPSED
```

## Aircraft

- Registration: [N139V](https://openairdocs.org/deregistered/N139V-2007-09-26), registration cancelled 2007-09-26, S/N AF838, built 1952 (OpenAirDocs)
- Reported make and model: BEECH C-45H
- Registry model: [Beech C-45H](https://openairdocs.org/model/beech-c-45h) (registry code 1151018) (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:  Boulder Muni

## Other investigations on N139V (1)

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 OAK67F0134](https://openairdocs.org/ntsb/OAK67F0134), Oct 21, 1966: Beech C-45H (N139V), Honolulu, HI, 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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