# NTSB MKC70D0146: Piper PA-25, N7406Z, Big Lake, MN, August 15, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 15, 1969
- Place: Big Lake, MN · BIG LAKE, MN
- Location: 45.3424° N, 93.7430° W: Placed by OpenAirDocs: center of Big Lake, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.3424&lon=-93.7430&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 30, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 170473
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC70D0146
- Page: https://openairdocs.org/ntsb/MKC70D0146

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2408  69/8/15    BIG LAKE,MINN       PIPER PA-25         CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0830                    N7406Z              PX-  0  0  0  AERIAL APPLICATION        AGE 28, 2800 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            200 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - FLYNN
        DEPARTURE POINT             INTENDED DESTINATION
          BIG LAKE,MINN               BIG LAKE,MINN
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           EVASIVE MANEUVER                                         IN FLIGHT: STARTING SWATH RUN
           COLLIDED WITH: TREES                                     IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PERSONNEL - MISCELLANEOUS-PERSONNEL: GROUND SIGNALMAN
           MISCELLANEOUS - EVASIVE MANEUVER TO AVOID COLLISION
           PILOT IN COMMAND - MISJUDGED CLEARANCE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 2700                       KIND OF OPERATION - DEFOLIATION (DUST)
          KIND OF CROP - POTATOES                                  TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          SWATH RUN-HOW FLOWN - CROSSWIND
        REMARKS- FLAGMAN WALKED IN FRONT OF ACFT. STRUCK TREES IN EVASIVE MANEUVER.
```

## Aircraft

- Registration: [N7406Z](https://openairdocs.org/deregistered/N7406Z-1976-04-21), registration cancelled 1976-04-21, S/N 25-3371 (OpenAirDocs)
- Reported make and model: PIPER PA-25
- Registry model: [Piper PA-25-235](https://openairdocs.org/model/piper-pa-25-235) (registry code 7102504) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Flynn

## Other investigations on N7406Z (1)

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 MKC71DER64](https://openairdocs.org/ntsb/MKC71DER64), May 29, 1971: Piper PA-25 (N7406Z), Hallock, MN, 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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