# NTSB NYC67A0064: Brantly 305, N2207U, West Mifflin, PA, October 22, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 22, 1966
- Place: West Mifflin, PA · WEST MIFFLIN, PA
- Location: 40.3574° N, 79.9056° W: Placed by OpenAirDocs: center of West Mifflin, PA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.3574&lon=-79.9056&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report May 23, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 120965
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC67A0064
- Page: https://openairdocs.org/ntsb/NYC67A0064

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1005  66/10/22   WEST MIFFLIN PA     BRANTLY 305         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 44, 81 TOTAL
        TIME - 1341                    N2207U              PX-  0  0  3  BUSINESS                  HOURS, ALL IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - ALLEGHENY COUNTY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                TAXI: AERIAL TAXI TO TAKEOFF
        PROBABLE CAUSE(S)
           MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE
          ROTORCFT-TRANSMISSION MOUNTING BRACKETS.
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
        REMARKS- SEVERE VIBRATION CAUSED LOSS OF CONTROL.
```

## Aircraft

- Registration: [N2207U](https://openairdocs.org/deregistered/N2207U-1970-06-29), registration cancelled 1970-06-29, S/N 1009, built 1965 (OpenAirDocs)
- Reported make and model: BRANTLY 305
- Registry model: [Brantly 305](https://openairdocs.org/model/brantly-305) (registry code 1440602) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Allegheny County

## Other investigations on N2207U (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 NYC66A0086](https://openairdocs.org/ntsb/NYC66A0086), Feb 7, 1966: Brantly 305 (N2207U), Cowansville, PA, substantial damage

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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