# NTSB MKC70A0033: Alon A-2A, N5646F, Clear Lake, IA, December 15, 1969

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 15, 1969
- Place: Clear Lake, IA · CLEAR LAKE, IA
- Location: 43.1351° N, 93.3737° W: Placed by OpenAirDocs: center of Clear Lake, IA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.1351&lon=-93.3737&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report April 10, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 149166
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC70A0033
- Page: https://openairdocs.org/ntsb/MKC70A0033

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3578  69/12/15   CLEAR LAKE,IOWA     ALON A-2A           CR-  2  0  0  NONCOMMERCIAL             COMMERCIAL, FL.INSTR.,
        TIME - UNK/NR                  N5646F              PX-  0  0  0  BUSINESS                  AGE 28, 860 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            59 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - MASON CITY
        DEPARTURE POINT             INTENDED DESTINATION
          MASON CITY,IOWA             FT.DODGE,IOWA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           COPILOT - SPATIAL DISORIENTATION
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           PERSONNEL - WEATHER PERSONNEL: INCORRECT WEATHER FORECAST
           WEATHER - LOW CEILING
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        WEATHER FORECAST - WEATHER CONSIDERABLY WORSE THAN FORECAST
        MISSING AIRCRAFT - LATER RECOVERED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                  300
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      2
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          330                                                       8
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- CP BELIEVED TO HAVE LOST CONTROL DURING CLIMBOUT. LOW CLOUD DECK UNFCST. RECOVERY DATE 12/15/69.
```

## Aircraft

- Registration: [N5646F](https://openairdocs.org/deregistered/N5646F-1976-06-24), registration cancelled 1976-06-24, S/N B-246, built 1967 (OpenAirDocs)
- Reported make and model: ALON A-2A
- Registry model: [Alon A-2A](https://openairdocs.org/model/alon-a-2a) (registry code 0540104) (OpenAirDocs)
- Registry engine: [Continental C90 series](https://openairdocs.org/engine/continental-c90-series) (registry code 17009, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Mason City

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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