# NTSB CHI74FEC14: Brantly B2, N2111U, Sterling Hts, MI, August 12, 1973

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: August 12, 1973
- Place: Sterling Hts, MI · STERLING HTS, MI
- Location: 42.5803° N, 83.0302° W: Placed by OpenAirDocs: center of Sterling Heights, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.5803&lon=-83.0302&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report October 2, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189233
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74FEC14
- Page: https://openairdocs.org/ntsb/CHI74FEC14

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2352  73/8/12    STERLING HTS,MICH   BRANTLY B2          CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 52, 3222
        TIME - 1404                    N2111U              PX-  0  0  1  BUSINESS                  TOTAL HOURS, 70 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - BERZ-MACOMB
        DEPARTURE POINT             INTENDED DESTINATION
          UTICA,MICH                  REMICK,MICH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: OTHER
        PROBABLE CAUSE(S)
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - SHEARED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- TAIL ROTOR HORIZ SHAFT BEARING.SHAFT SHEARED.T/D IN SIDEWARD FLT TO L.
```

## Aircraft

- Registration: [N2111U](https://openairdocs.org/deregistered/N2111U-2017-05-22), registration cancelled 2017-05-22, S/N 157, built 1962 (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
- Airport: Berz-Macomb

## 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 19730812026769A](https://openairdocs.org/incident/19730812026769A), Aug 12, 1973: Hynes B2, Sterling Hts, MI, Substantial damage. Tail rotor horiz shaft bearing. Shaft sheared.t/d in sideward flt to l.

## Other investigations on N2111U (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 FTW94LA053](https://openairdocs.org/ntsb/FTW94LA053), Dec 24, 1993: Brantly Helicopter B-2 (N2111U), Giddings, TX, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN MAIN ROTOR RPM. THE WEATHER CONDITIONS AND DELAYED APPLICATION OF CARBURETOR WERE FACTORS IN THE ACCIDENT.

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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