# NTSB NYC72FHJ01: Bell-Cci 47G2, N9021R, Amityville, NY, July 11, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 11, 1971
- Place: Amityville, NY · AMITYVILLE, NY
- Location: 40.6698° N, 73.4158° W: Placed by OpenAirDocs: center of Amityville, NY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.6698&lon=-73.4158&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 2, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 162592
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC72FHJ01
- Page: https://openairdocs.org/ntsb/NYC72FHJ01

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2455  71/7/11    AMITYVILLE,NY       BELL-CCI 47G2       CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1445                    N9021R              PX-  0  0  0  DUAL                      AGE 24, 2325 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            170 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          AMITYVILLE,NY               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           DUAL STUDENT - MISJUDGED SPEED AND ALTITUDE
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
           TERRAIN - WET,SOFT GROUND
        REMARKS- DRNG PRACTICE AUTO ACFT HIT GND TAIL LOW,SKIDS DUG INTO WET SOFT SAND,ROLLED OVER.
```

## Aircraft

- Registration: [N9021R](https://openairdocs.org/aircraft/N9021R), registered now, S/N CCI-165 (OpenAirDocs)
- Reported make and model: BELL-CCI 47G2
- Registry model: [Bell-Continental Copters 47G2](https://openairdocs.org/model/bell-continental-copters-47g2) (registry code 1181069) (OpenAirDocs)
- Registry engine: [Lycoming VO-435-A1F](https://openairdocs.org/engine/lycoming-vo-435-a1f) (registry code 42200, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N9021R (3)

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 CEN12LA120](https://openairdocs.org/ntsb/CEN12LA120), Jan 1, 2012: Continental Copters 47G2 (N9021R), Lohn, TX, substantial damage. Probable cause: The improper installation of the tail rotor gearbox by maintenance personnel, which led to accelerated wear of the ring and pinion gears, resulting in the loss of tail rotor effectiveness and…
- [NTSB LAX99LA047](https://openairdocs.org/ntsb/LAX99LA047), Dec 12, 1998: Bell 47G2 (N9021R), Helendale, CA, substantial damage. Probable cause: The pilot's failure to follow proper procedures to recover from main rotor blade aerodynamic retreating blade stall.
- [NTSB LAX97LA285](https://openairdocs.org/ntsb/LAX97LA285), Aug 12, 1997: Bell 47G2 (N9021R), Mojave, CA, substantial damage. Probable cause: The student's improper use of the throttle and collective controls and the flight instructor's inadequate supervision of the flight.

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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