# NTSB DEN71DXD28: Beech 23, N7636R, Twin Lakes, CO, September 21, 1970

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 21, 1970
- Place: Twin Lakes, CO · TWIN LAKES, CO
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report June 30, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 148456
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN71DXD28
- Page: https://openairdocs.org/ntsb/DEN71DXD28

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3796  70/9/21    TWIN LAKES,COLO     BEECH 23            CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1015                    N7636R              PX-  0  0  0  DUAL                      AGE 25, 635 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            42 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          AMARILLO,TEX                ASPEN,COLO                   PUEBLO,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: CLIMB TO CRUISE
           COLLIDED WITH: OBJECT                                    LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
           TERRAIN - ROUGH/UNEVEN
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- ENG LOST PWR. CRASHED INTO ROCKS. INVEST DISCLOSED NO MALFUNCTION. ACFT OP NEAR SERVICE CEILING.
```

## Aircraft

- Registration: [N7636R](https://openairdocs.org/deregistered/N7636R-2013-02-26), registration cancelled 2013-02-26, S/N M-1257, built 1969 (OpenAirDocs)
- Reported make and model: BEECH 23
- Registry model: [Beech B23](https://openairdocs.org/model/beech-b23) (registry code 1151240) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, 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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