# NTSB MKC74DER05: Aero Comdr A-9B, N7757V, Winnebago, MN, August 9, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 9, 1973
- Place: Winnebago, MN · WINNEBAGO, MN
- Location: 43.7649° N, 94.1706° W: Placed by OpenAirDocs: center of Winnebago, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.7649&lon=-94.1706&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 17, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 188853
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC74DER05
- Page: https://openairdocs.org/ntsb/MKC74DER05

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3361   73/8/9    WINNEBAGO,MINN      AERO COMDR A-9B     CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 60, 5225
        TIME - 1745                    N7757V              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 774 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BLUE EARTH,MINN             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: STARTING SWATH RUN
           COLLIDED WITH: CROP                                      IN FLIGHT: STARTING SWATH RUN
        PROBABLE CAUSE(S)
           POWERPLANT - FUEL SYSTEM: PUMPS
           MISCELLANEOUS ACTS,CONDITIONS - PRESSURE TOO LOW
           TERRAIN - HIGH VEGETATION
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1700                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - CORN                                      TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - USED
          CRASH HELMET - AVAILABLE USED                            CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -HILLY
          ELEVATION-AREA BEING TREATED-FEET -  1100                SWATH RUN-HOW FLOWN - UPWIND
        REMARKS- DRG FLARE OUT ENG DID NOT RESPOND SETTLED INTO CORN.FUEL PRESSURE LOW ENG OPS NML WITH BOOST ON.
```

## Aircraft

- Registration: [N7757V](https://openairdocs.org/deregistered/N7757V-2018-02-23), registration cancelled 2018-02-23, S/N 1503, built 1969 (OpenAirDocs)
- Reported make and model: AERO COMDR A-9B
- Registry model: [Aero Commander CALLAIR A-9B](https://openairdocs.org/model/aero-commander-callair-a-9b) (registry code 0144206) (OpenAirDocs)
- Registry engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## 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 19730809035919A](https://openairdocs.org/incident/19730809035919A), Aug 9, 1973: Airpts A9B, Winnebago, MN, Substantial damage. Drg flare out eng did not respond settled into corn. Fuel pressure low eng ops nml with boost on.

## Other investigations on N7757V (2)

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 DEN86FTK02](https://openairdocs.org/ntsb/DEN86FTK02), May 20, 1986: Aero Commander Callair A-9B (N7757V), Dell Rapids, SD, substantial damage
- [NTSB MKC78DCD54](https://openairdocs.org/ntsb/MKC78DCD54), Sep 6, 1978: Callair A-9B (N7757V), Lake Park, IA, 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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