# NTSB DEN73AD030: Beech C90, N936K, Blairstown, IA, January 3, 1973

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: January 3, 1973
- Place: Blairstown, IA · BLAIRSTOWN, IA
- Location: 41.9060° N, 92.0822° W: Placed by OpenAirDocs: center of Blairstown, IA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.9060&lon=-92.0822&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 5 fatal
- Status: Completed, report May 17, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 169676
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN73AD030
- Page: https://openairdocs.org/ntsb/DEN73AD030

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0705   73/1/3    BLAIRSTOWN,IOWA     BEECH C90           CR-  2  0  0  NONCOMMERCIAL             AIRLINE TRANSPORT, AGE
        TIME - 1722                    N936K               PX-  3  0  0  CORP/EXEC                 49, 4225 TOTAL HOURS, 25
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          OMAHA,NEBR                  CEDAR RAPIDS,IOWA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
           WEATHER - LOW CEILING
           WEATHER - FOG
           WEATHER - SNOW
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                  200
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          1/4 MILE OR LESS                                         SNOW
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          FOG                                                      IFR
        TYPE OF FLIGHT PLAN
          IFR
         FIRE AFTER IMPACT
        REMARKS- BEGAN DESCENT TO ILS APCH LATE.BELIEVED PLT EXPEDITED DESCENT,APCH FLAPS,GR DWN.L WG,ENG,TAIL SEP.
```

## Aircraft

- Registration: [N936K](https://openairdocs.org/deregistered/N936K-1973-04-05), registration cancelled 1973-04-05, S/N LJ-539 (OpenAirDocs)
- Reported make and model: BEECH C90
- Registry model: [Beech C90](https://openairdocs.org/model/beech-c90) (registry code 1152913) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: Destroyed

## 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 19730103003689A](https://openairdocs.org/incident/19730103003689A), Jan 3, 1973: Beech 65A90, Blairstown, IA, Destroyed, 4 fatal. Began descent to ILS apch late. Believed plt expedited descent,apch flaps,gr dwn.l wg,eng,tail sep.

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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