# NTSB DEN73FTE85: Cessna 320C, N543M, Boulder, CO, June 11, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 11, 1973
- 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: 2 uninjured
- Status: Completed, report October 19, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189921
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN73FTE85
- Page: https://openairdocs.org/ntsb/DEN73FTE85

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2541  73/6/11    BOULDER,COLO        CESSNA 320C         CR-  0  0  1  NONCOMMERCIAL             AIRLINE TRANSPORT, AGE
        TIME - 1415                    N543M               PX-  0  0  1  PLEASURE/PERSONAL TRANSP  40, 16000 TOTAL HOURS, 1
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - BOULDER MUNICIPAL
        DEPARTURE POINT             INTENDED DESTINATION
          BOULDER,COLO                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO EXTEND LANDING GEAR
           PILOT IN COMMAND - FAILED TO ASSURE THE GEAR WAS DOWN AND LOCKED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - CHECKLIST-FAILED TO USE
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
```

## Aircraft

- Registration: [N543M](https://openairdocs.org/aircraft/N543M), registered now, S/N 320-0030, built 1961 (OpenAirDocs)
- Reported make and model: CESSNA 320C
- Registry model: [Cessna 320](https://openairdocs.org/model/cessna-320) (registry code 2074502) (OpenAirDocs)
- Registry engine: [Continental TSI0-470-B](https://openairdocs.org/engine/continental-tsi0-470-b) (registry code 17029, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Boulder Municipal

## 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 19730611020739A](https://openairdocs.org/incident/19730611020739A), Jun 11, 1973: Cessna 320, Boulder, CO, 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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