# NTSB DEN74FTE02: Bell 47G-5A, N2991W, Aurora, CO, July 5, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 5, 1973
- Place: Aurora, CO · AURORA, CO
- Location: 39.7294° N, 104.8319° W: Placed by OpenAirDocs: center of Aurora, CO, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7294&lon=-104.8319&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 15, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189196
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN74FTE02
- Page: https://openairdocs.org/ntsb/DEN74FTE02

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2429   73/7/5    AURORA,COLO         BELL 47G-5A         CR-  0  0  2  INSTRUCTIONAL             ATP,FLIGHT INSTR., AGE
        TIME - 1430                    N2991W              PX-  0  0  0  DUAL                      26, 4010 TOTAL HOURS, 161
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - SKY RANCH
        DEPARTURE POINT             INTENDED DESTINATION
          AURORA,COLO                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           DUAL STUDENT - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           DUAL STUDENT - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        REMARKS- STUDENT ROLLED OFF THROTTLE DURG HOVER.
```

## Aircraft

- Registration: [N2991W](https://openairdocs.org/deregistered/N2991W-2012-09-25), registration cancelled 2012-09-25, S/N 25068, built 1972 (OpenAirDocs)
- Reported make and model: BELL 47G-5A
- Registry model: [Bell 47G-5A](https://openairdocs.org/model/bell-47g-5a) (registry code 1181034) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Sky Ranch

## 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 19730705020219A](https://openairdocs.org/incident/19730705020219A), Jul 5, 1973: Bell 47G5A, Aurora, CO, Substantial damage. Student rolled off throttle durg hover.

## Other investigations on N2991W (2)

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 CHI94FA330](https://openairdocs.org/ntsb/CHI94FA330), Mar 22, 1994: Bell 47G-5A (N2991W), Wisconsin Rpds, WI, destroyed, 1 fatal. Probable cause: Undetermined.
- [NTSB DEN74DTE43](https://openairdocs.org/ntsb/DEN74DTE43), Jan 12, 1974: Bell 47G-5 (N2991W), Aurora, CO, 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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