# NTSB DEN73FTE73: Cessna 337C, N2631S, Aurora, CO, April 28, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 28, 1973
- Place: Aurora, CO · AURORA, CO
- Location: 39.7294° N, 104.8319° W: Placed by OpenAirDocs: center of Aurora, CO, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7294&lon=-104.8319&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report June 5, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 190764
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN73FTE73
- Page: https://openairdocs.org/ntsb/DEN73FTE73

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0872  73/4/28    AURORA,COLO         CESSNA 337C         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1230                    N2631S              PX-  0  0  3  DUAL                      AGE 43, 2948 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            75 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - SKY RANCH
        DEPARTURE POINT             INTENDED DESTINATION
          BOULDER,COLO                AURORA,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            LANDING: GO-AROUND
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER EMERGENCY PROCEDURES
           WEATHER - HIGH DENSITY ALTITUDE
           MISCELLANEOUS ACTS,CONDITIONS - INTENTIONAL WHEELS-UP
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        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                  RELATIVE BEARING OF WIND
          NONE                                                     CALM
        TEMPERATURE-F                                            TYPE OF WEATHER CONDITIONS
           65                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- LOST PWR ON FRONT ENG WHEN BOOST PUMP MISUSED IN DENS ALT OF 7200 FT.UN MAINTAIN FLT,LND GR UP.
```

## Aircraft

- Registration: [N2631S](https://openairdocs.org/deregistered/N2631S-1974-05-14), registration cancelled 1974-05-14, S/N 3370931 (OpenAirDocs)
- Reported make and model: CESSNA 337C
- Registry model: [Cessna 337C](https://openairdocs.org/model/cessna-337c) (registry code 2075712) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Sky Ranch

## 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 19730428010009A](https://openairdocs.org/incident/19730428010009A), Apr 28, 1973: Cessna 337G, Aurora, CO, Substantial damage. Lost pwr on front eng when boost pump misused in dens alt of 7200 ft. un maintain flt,lnd gr up.

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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