# NTSB MKC66A0065: Bell 47D1, N4252A, Maple Plain, MN, June 15, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 15, 1966
- Place: Maple Plain, MN · MAPLE PLAIN, MN
- Location: 45.0086° N, 93.6624° W: Placed by OpenAirDocs: center of Maple Plain, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.0086&lon=-93.6624&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 17, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 171598
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC66A0065
- Page: https://openairdocs.org/ntsb/MKC66A0065

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0531  66/6/15    MAPLE PLAIN MINN    BELL 47D1           CR-  0  0  1  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 0930                    N4252A              PX-  0  0  0  AERIAL APPLICATION        30, 1221 TOTAL HOURS, 319
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: PROCEDURE TURNAROUND
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           MISCELLANEOUS ACTS,CONDITIONS - FUEL STARVATION
          ROTOCFT-LFT SKID STRUCK EARTH HUMMOCK AFTER TDOWN.
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -   25                       KIND OF OPERATION - OTHER
          KIND OF CROP - MOSQUITO CONTROL                          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 - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             TERRAIN-TYPE -SWAMPY/WATER
          ELEVATION-AREA BEING TREATED-FEET -  1000                SWATH RUN-HOW FLOWN - DOWNWIND
          PROCEDURE TURNAROUND - SECOND 1/3 TURN
        REMARKS- PLT SPRAYING DIESEL OIL FOR MOSQUITO CONTROL.
```

## Aircraft

- Registration: [N4252A](https://openairdocs.org/deregistered/N4252A-2017-03-15), registration cancelled 2017-03-15, S/N 117, built 1948 (OpenAirDocs)
- Reported make and model: BELL 47D1
- Registry model: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed

## Other investigations on N4252A (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 CHI71DDJ11](https://openairdocs.org/ntsb/CHI71DDJ11), Aug 21, 1970: Bell 47D1 (N4252A), Manitowish, WI, 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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