# NTSB DEN68F0173: Beech 35, N3870N, Boulder, CO, November 22, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 22, 1967
- 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 January 24, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 112920
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN68F0173
- Page: https://openairdocs.org/ntsb/DEN68F0173

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4176  67/11/22   BOULDER,COLO        BEECH 35            CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 24, 750
        TIME - 1215                    N3870N              PX-  0  0  1  BUSINESS                  TOTAL HOURS, 600 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - BOULDER
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: NORMAL RETRACTION/EXTENSION ASSEMBLY
           AIRFRAME - LANDING GEAR: EMERGENCY/EXTENSION ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER ALIGNMENT/ADJUSTMENT
           MISCELLANEOUS ACTS,CONDITIONS - JAMMED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SUSPECTED MECHANICAL DISCREPANCY
                                  UNUSUAL NOISE
        REMARKS- DOG LEG FROM LNDG GEAR BOX TO NOSE GEAR ACTUATING ROD FAILED.
```

## Aircraft

- Registration: [N3870N](https://openairdocs.org/deregistered/N3870N-2017-10-26), registration cancelled 2017-10-26, S/N D-1111, built 1947 (OpenAirDocs)
- Reported make and model: BEECH 35
- Registry model: [Beech 35](https://openairdocs.org/model/beech-35) (registry code 1151502) (OpenAirDocs)
- Registry engine: [Continental E185 series](https://openairdocs.org/engine/continental-e185-series) (registry code 17014, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Boulder

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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