# NTSB CHI74FEK26: Bell 47D1, N157B, Circleville, OH, May 21, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 21, 1974
- Place: Circleville, OH · CIRCLEVILLE, OH
- Location: 39.6012° N, 82.9325° W: Placed by OpenAirDocs: center of Circleville, OH, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.6012&lon=-82.9325&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 20, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 130190
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74FEK26
- Page: https://openairdocs.org/ntsb/CHI74FEK26

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2355  74/5/21    CIRCLEVILLE,OHIO    BELL 47D1           CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 28, 1140
        TIME - 1015                    N157B               PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 923 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CIRCLEVILLE,OHIO            LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - RPM-UNCONTROLLABLE-OVERSPEED
           POWERPLANT - ENGINE CONTROLS: THROTTLE-POWER LEVER ASSEMBLIES
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -  900                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - CORN                                      TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE-NOT USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  945                 SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- UNWANTED NEEDLE SPLIT.INCR IN PWR CAUSED ENG OVRSPEED.UN CK THROTTLE RIGGING.TAIL LOW LDG.
```

## Aircraft

- Registration: [N157B](https://openairdocs.org/aircraft/N157B), registered now, S/N 11, built 1947 (OpenAirDocs)
- Reported make and model: BELL 47D1
- Registry model: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- 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 19740521027169A](https://openairdocs.org/incident/19740521027169A), May 21, 1974: Bell 47D1, Circleville, OH, Substantial damage. Unwanted needle split. Incr in pwr caused eng ovrspeed. Un ck throttle rigging. Tail low ldg.

## Other investigations on N157B (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 ANC68A0001](https://openairdocs.org/ntsb/ANC68A0001), Jul 4, 1967: Bell 47D1 (N157B), Tok, AK, 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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