# NTSB FTW76FPJ46: Brantley 305, N2231U, Chattanooga, OK, September 11, 1976

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: September 11, 1976
- Place: Chattanooga, OK · CHATTANOOGA, OK
- Location: 34.4239° N, 98.6540° W: Placed by OpenAirDocs: center of Chattanooga, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.4239&lon=-98.6540&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 4 minor
- Status: Completed, report November 4, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 155832
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW76FPJ46
- Page: https://openairdocs.org/ntsb/FTW76FPJ46

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2835  76/9/11    CHATTANOOGA,OK      BRANTLEY 305        CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 1640                    N2231U              PX-  0  1  3  DEMONSTRATION             AGE 35, 1346 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            12 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - CHATTANOOGA
        DEPARTURE POINT             INTENDED DESTINATION
          CHATTANOOGA,OK              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ROLL OVER                                                TAXI: AERIAL TAXI TO TAKEOFF
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  DIRECTIONAL CONTROL PROBLEM
         FIRE AFTER IMPACT
        REMARKS- LOW TIME HEL PLT. HOVER-TAXI AT 10-15FT HEIGHT.
```

## Aircraft

- Registration: [N2231U](https://openairdocs.org/deregistered/N2231U-2011-07-22), registration cancelled 2011-07-22, S/N 1044, built 1966 (OpenAirDocs)
- Reported make and model: BRANTLEY 305
- Registry model: [Brantly 305](https://openairdocs.org/model/brantly-305) (registry code 1440602) (OpenAirDocs)
- Registry engine: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed
- Airport: Chattanooga

## 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 19760911030889A](https://openairdocs.org/incident/19760911030889A), Sep 11, 1976: Hynes 305BRNTLY, Chattanooga, OK, Destroyed. Low time hel plt. Hover-taxi at 10-15FT height.

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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