# NTSB DEN73AD025: Piper PA-23, N6767Y, Nederland, CO, November 25, 1972

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: November 25, 1972
- Place: Nederland, CO · NEDERLAND, CO
- Location: 39.9638° N, 105.5059° W: Placed by OpenAirDocs: center of Nederland, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.9638&lon=-105.5059&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report March 23, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 169462
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN73AD025
- Page: https://openairdocs.org/ntsb/DEN73AD025

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3619  72/11/25   NEDERLAND,COLO      PIPER PA-23         CR-  1  0  0  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 0935                    N6767Y              PX-  0  0  0  FERRY                     AGE 21, 3636 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            UNK/NR IN TYPE,
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          STEAMBOAT SPRGS,COLO        DENVER,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               IN FLIGHT: NORMAL CRUISE
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - CONTINUED FLIGHT INTO KNOWN AREAS OF SEVERE TURBULENCE
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
        FACTOR(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     SNOW
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          UNKNOWN/NOT REPORTED                                     UNKNOWN/NOT REPORTED
        TYPE OF FLIGHT PLAN
          NONE
         FIRE AFTER IMPACT
        REMARKS- AIRMET-OVR MTNS COLO MDT TO CHC LCL SVR TURBC BLO 16000 WITH STG UPDFTS/DWNDFTS EASTERN SLOPE.
```

## Aircraft

- Registration: [N6767Y](https://openairdocs.org/deregistered/N6767Y-1973-06-26), registration cancelled 1973-06-26, S/N 27-4098 (OpenAirDocs)
- Reported make and model: PIPER PA-23
- Registry model: [Piper PA-23-250 (6PCLM)](https://openairdocs.org/model/piper-pa-23-250-6pclm) (registry code 7102313) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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