# NTSB CHI80FEC25: Bell 47D1, N74006, Milan, MI, July 22, 1980

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: July 22, 1980
- Place: Milan, MI · MILAN, MI
- Location: 42.0813° N, 83.6848° W: Placed by OpenAirDocs: center of Milan, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.0813&lon=-83.6848&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report November 13, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 129230
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI80FEC25
- Page: https://openairdocs.org/ntsb/CHI80FEC25

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2462  80/7/22  NR.MILAN,MI           BELL 47D1           CR-  0  1  0  COMMERCIAL                COMMERCIAL, AGE 53, 7685
        TIME - 1445                    N74006              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 7454 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         MILAN,MI                     LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: SWATH RUN
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - CORRODED/CORROSION
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 7254                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - BEANS                                     TYPE OF CHEMICAL USED - DRY 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 -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  700                 SWATH RUN-HOW FLOWN - UPWIND
          PROCEDURE TURNAROUND - ENTRY TO PROCEDURE TURN
        REMARKS- TAIL ROTOR BLADE,PN 47-642-102-49,FAILED AT OUTBOARD BEARING RELIEF RADIUS OF GRIP.
```

## Aircraft

- Registration: [N74006](https://openairdocs.org/deregistered/N74006-1998-01-29), registration cancelled 1998-01-29, S/N 470 (OpenAirDocs)
- Reported make and model: BELL 47D1
- Registry model: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802) (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 19800722030119A](https://openairdocs.org/incident/19800722030119A), Jul 22, 1980: Bell 47D1, Milan, MI, Substantial damage. Lost tail rotor blades on pull up from spray run, unbalance tore off tail rotor assembly. Crashed on right turn.

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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