# NTSB CHI81FA064: Brantley B2B, N2276U, Chesterton, IN, June 10, 1981

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: June 10, 1981
- Place: Chesterton, IN · CHESTERTON, IN
- Location: 41.5998° N, 87.0550° W: Placed by OpenAirDocs: center of Chesterton, IN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.5998&lon=-87.0550&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report August 14, 1981
- Report: Brief approved by the director
- Safety recommendations: Yes
- NTSB case key (mKey): 79548
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI81FA064
- Page: https://openairdocs.org/ntsb/CHI81FA064

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1489  81/6/10    CHESTERTON,IN       BRANTLEY B2B        CR-  2  0  0  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1100                    N2276U              PX-  0  0  0  DUAL                      AGE 56, 9166 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            161 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CHESTERTON,IN               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
         FIRE AFTER IMPACT
        REMARKS- T/R BLADE,S/N 533,FAILED IN THE BLADE SHANK OUTBOARD OF THE DOUBLE BEARING LOCATION.
```

## Aircraft

- Registration: [N2276U](https://openairdocs.org/deregistered/N2276U-2012-10-16), registration cancelled 2012-10-16, S/N 441, built 1965 (OpenAirDocs)
- Reported make and model: BRANTLEY B2B
- Registry model: [Brantly B-2B](https://openairdocs.org/model/brantly-b-2b) (registry code 1440506) (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: 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 19810610031949A](https://openairdocs.org/incident/19810610031949A), Jun 10, 1981: Hynes B2B, Chesterton, IN, Destroyed. Tail rotor blade failure from fatigue cracking. Seperated blade struck main rotor blade. Helicopter spun in.

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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