# NTSB CHI65A0107: Brantly B2, N2100U, Prophetstown, IL, June 28, 1965

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: June 28, 1965
- Place: Prophetstown, IL · PROPHETSTOWN, IL
- Location: 41.6703° N, 89.9352° W: Placed by OpenAirDocs: center of Prophetstown, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.6703&lon=-89.9352&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report December 6, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 178239
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI65A0107
- Page: https://openairdocs.org/ntsb/CHI65A0107

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0638  65/6/28    PROPHETSTOWN ILL    BRANTLY B2          CR-  0  1  0  NONCOMMERCIAL             PRIVATE, AGE 34, 108
        TIME - 1645                    N2100U              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: INCORRECT FACTORY INSTALLATION
           MISCELLANEOUS ACTS,CONDITIONS - DISREGARD OF GOOD OPERATING PRACTICE
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - UNAPPROVED MODIFICATION
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- SIMILAR FAILURE NYC-66-A-27 8/23/65 N2202U. TAIL ROTOR GUARD & SKID ASSY FASHIONED FROM IRON ROD.
```

## Aircraft

- Registration: [N2100U](https://openairdocs.org/deregistered/N2100U-2021-07-31), registration cancelled 2021-07-31, S/N 146, built 1961 (OpenAirDocs)
- Reported make and model: BRANTLY B2
- Registry model: [Brantly B-2](https://openairdocs.org/model/brantly-b-2) (registry code 1440502) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N2100U (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 CHI78FEE53](https://openairdocs.org/ntsb/CHI78FEE53), Jul 8, 1978: Brantly B2B (N2100U), Huntley, IL, destroyed

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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