# NTSB DEN73AD028: Convair 580, N73112, Alamosa, CO, December 4, 1972

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: December 4, 1972
- Place: Alamosa, CO · ALAMOSA, CO
- Location: 37.4745° N, 105.8770° W: Placed by OpenAirDocs: center of Alamosa, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.4745&lon=-105.8770&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 16 uninjured
- Status: Completed, report March 30, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 168662
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN73AD028
- Page: https://openairdocs.org/ntsb/DEN73AD028

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0041   72/12/4 NR.ALAMOSA,COLO       CONVAIR 580         CR-  0  1  2  SCHED DOM PASSG SRV       ATP,FLIGHT INSTR., AGE
        TIME - 2110                    N73112              PX-  0  0 14                            45, 13938 TOTAL HOURS,
                                       DAMAGE-NONE         OT-  0  0  0                            192 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - FRONTIER AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          DENVER,COLO                 ALBUQUERQUE,N MEX           ALAMOSA,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT SIGN ON
        WEATHER BRIEFING - COMPANY DISPATCH
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                 UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          ZERO                                                      DRIZZLE, RAIN
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          NONE                                                     IFR
        TYPE OF FLIGHT PLAN
          IFR
        REMARKS- FL 170 ONLY ALT AVAIL. SEVERE TO EXTREME TURB.  STEWARDESS PERFORMING ASGND DUTIES PER CO POLICY.
```

## Aircraft

- Registration: [N73112](https://openairdocs.org/deregistered/N73112-1997-06-16), registration cancelled 1997-06-16, S/N 16 (OpenAirDocs)
- Reported make and model: CONVAIR 580
- Registry model: [Convair 340-31](https://openairdocs.org/model/convair-340-31) (registry code 2422804) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: No damage

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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