# NTSB DEN74FTE73: Cessna 150, N7171X, Denver, CO, May 20, 1974

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: May 20, 1974
- Place: Denver, CO · DENVER, CO
- Location: 39.7392° N, 104.9847° W: Placed by OpenAirDocs: center of Denver, CO, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7392&lon=-104.9847&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report June 11, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 170258
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN74FTE73
- Page: https://openairdocs.org/ntsb/DEN74FTE73

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1158  74/5/20    DENVER,COLO         CESSNA 150          CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 37, 388
        TIME - 1912                    N7171X              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 375 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - STAPLETON INTL
        DEPARTURE POINT             INTENDED DESTINATION
          DENVER,COLO                 LIMON,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: RUN
           STALL                                                    LANDING: TRAFFIC PATTERN-CIRCLING
        PROBABLE CAUSE(S)
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           POWERPLANT - IGNITION SYSTEM: HIGH TENSION WIRING
           MISCELLANEOUS ACTS,CONDITIONS - CARBON DEPOSITS
           MISCELLANEOUS ACTS,CONDITIONS - CHAFED
           PILOT IN COMMAND - FAILED TO ABORT TAKEOFF
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          NONE                                                     VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- DA 7000FT.MIXT CTL FULL RICH.SPARK PLUG FOULED,LEAD SHORTED BY COWL CTC.TRIED TO RETN TO FLD.
```

## Aircraft

- Registration: [N7171X](https://openairdocs.org/deregistered/N7171X-1975-05-07), registration cancelled 1975-05-07, S/N 15059271 (OpenAirDocs)
- Reported make and model: CESSNA 150
- Registry model: [Cessna 150A](https://openairdocs.org/model/cessna-150a) (registry code 2071804) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Stapleton Intl

## 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 19740520012349A](https://openairdocs.org/incident/19740520012349A), May 20, 1974: Cessna 150A, Denver, CO, Substantial damage. Da 7000FT.mixt ctl full rich. Spark plug fouled,lead shorted by cowl ctc. Tried to retn to fld.

## Other investigations on N7171X (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 FTW68F0617](https://openairdocs.org/ntsb/FTW68F0617), Jun 9, 1968: Cessna 150 (N7171X), Lewisville, TX, 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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