# NTSB MKC73FCA14: Bell 47G, N9655, Chesterfield, MO, January 24, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: January 24, 1973
- Place: Chesterfield, MO · CHESTERFIELD, MO
- Location: 38.6631° N, 90.5771° W: Placed by OpenAirDocs: center of Chesterfield, MO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.6631&lon=-90.5771&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 2, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 169636
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC73FCA14
- Page: https://openairdocs.org/ntsb/MKC73FCA14

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0029  73/1/24    CHESTERFIELD,MO     BELL 47G            CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1033                    N9655               PX-  0  0  0  DUAL                      AGE 30, 4800 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            4000 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SPIRIT ST LOUIS
        DEPARTURE POINT             INTENDED DESTINATION
          CHESTERFIELD,MO             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ROLL OVER                                                TAKEOFF: VERTICAL
        PROBABLE CAUSE(S)
           DUAL STUDENT - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           TERRAIN - WET,SOFT GROUND
        REMARKS- UNLEVEL LIFT OFF-POSSIBLE ROTOR WASH.INSTRUCTOR PILOT FAILED TO MONITOR STUDENTS LIFT OFF.
```

## Aircraft

- Registration: [N9655](https://openairdocs.org/deregistered/N9655-1988-10-25), registration cancelled 1988-10-25, S/N 1286 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Bell 47G](https://openairdocs.org/model/bell-47g) (registry code 1181002) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Spirit St Louis

## 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 19730124000159A](https://openairdocs.org/incident/19730124000159A), Jan 24, 1973: Bell 47G, Chesterfield, MO, Substantial damage. Unlevel lift off-possible rotor wash. Instructor pilot failed to monitor students lift off.

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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