# NTSB DEN81FTA12: Aero Comdr A-9B, N7781V, Park City, MT, July 31, 1981

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 31, 1981
- Place: Park City, MT · PARK CITY, MT
- Location: 45.6309° N, 108.9253° W: Placed by OpenAirDocs: center of Park City, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.6309&lon=-108.9253&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report December 18, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 123903
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN81FTA12
- Page: https://openairdocs.org/ntsb/DEN81FTA12

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2475  81/7/31    PARK CITY,MT        AERO COMDR A-9B     CR-  1  0  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0610                    N7781V              PX-  0  0  0  AERIAL APPLICATION        AGE 63, 17000 TOTAL
                                       DAMAGE-DESTROYED    OT-  0  0  0                            HOURS, 6000 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          RED LODGE,MT                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: PROCEDURE TURNAROUND
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INCAPACITATION
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 6000                       KIND OF OPERATION - FERTILIZING (LIQUID)
          KIND OF CROP - BEANS                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  3600                SWATH RUN-HOW FLOWN - WIND CALM
          PROCEDURE TURNAROUND - THIRD 1/3 TURN
        REMARKS- SEVERE ATHEROSCLEROTIC CORONARY ARTERY DISEASE W CALCIFICATION.
```

## Aircraft

- Registration: [N7781V](https://openairdocs.org/deregistered/N7781V-2013-05-09), registration cancelled 2013-05-09, S/N 1534, built 1970 (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: 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 19810731046559A](https://openairdocs.org/incident/19810731046559A), Jul 31, 1981: Airpts A9B, Park City, MT, Destroyed. Was observed to roll into vertical bank and dive to ground on spray turn around. Possible pilot medical problem.

## Other investigations on N7781V (3)

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 MIA72DKG21](https://openairdocs.org/ntsb/MIA72DKG21), Aug 13, 1971: Aero Comdr A-9B (N7781V), Aragon, GA, substantial damage
- [NTSB MIA71DKG92](https://openairdocs.org/ntsb/MIA71DKG92), Jun 8, 1971: Aero-Comdr A-9B (N7781V), Resaca, GA, substantial damage
- [NTSB MIA70FKQ07](https://openairdocs.org/ntsb/MIA70FKQ07), May 7, 1970: Callair A9B (N7781V), Fitler, MS, 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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