# NTSB CHI81FEP34: Sikorsky HRS-1, N4782S, Rosedale, WI, July 2, 1981

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 2, 1981
- Place: Rosedale, WI · ROSEDALE, WI
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 6, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 124667
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI81FEP34
- Page: https://openairdocs.org/ntsb/CHI81FEP34

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1933   81/7/2    ROSEDALE,WI         SIKORSKY HRS-1      CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 35, 6248
        TIME - 1830                    N4782S              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 188 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          ROSEDALE,WI                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: PULLUP FROM SWATH RUN
        PROBABLE CAUSE(S)
           ROTORCRAFT - MISCELLANEOUS UNITS AND ASSEMBLIES: TAIL BOOMS/PYLONS/CONES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -  188                       KIND OF OPERATION - DUSTING CROPS
          KIND OF CROP - PEAS                                      TYPE OF CHEMICAL USED - UNKNOWN/NOT REPORTED
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    COCKPIT CRASHPAD - INSTALLED
          CRASH BAR - INSTALLED                                    TANK/HOPPER-LOCATION - AFT OF PILOT
          TERRAIN-TYPE -LEVEL,FLAT                                 ELEVATION-AREA BEING TREATED-FEET -  700
          SWATH RUN-HOW FLOWN - UNKNOWN/NOT REPORTED               PROCEDURE TURNAROUND - ENTRY TO PROCEDURE TURN
        REMARKS- CRACK IN DOUBLER AT THE TAIL ROTOR PYLON.LANDED IN CORN FLD.
```

## Aircraft

- Registration: [N4782S](https://openairdocs.org/deregistered/N4782S-2012-12-13), registration cancelled 2012-12-13, S/N 127799 (OpenAirDocs)
- Reported make and model: SIKORSKY HRS-1
- Registry model: [Sikorsky HRS-1](https://openairdocs.org/model/sikorsky-hrs-1) (registry code 8141612) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Helicopter
- 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 19810702047209A](https://openairdocs.org/incident/19810702047209A), Jul 2, 1981: Orlhel HRS1SKRSKY, Rosendale, WI, Substantial damage. Tail rotor pylon support failed due to a fatigue crack. Emergency landing further damaged helicopter.

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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