# NTSB DEN75AD009: Bell 47G3B1, N73972, Ogden, UT, September 5, 1974

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: September 5, 1974
- Place: Ogden, UT · OGDEN, UT
- Location: 41.2284° N, 111.9681° W: Placed by OpenAirDocs: center of Ogden, UT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.2284&lon=-111.9681&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious
- Status: Completed, report January 2, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 138717
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN75AD009
- Page: https://openairdocs.org/ntsb/DEN75AD009

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3686   74/9/5  NR.OGDEN,UT           BELL 47G3B1         CR-  1  0  0  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 1440                    N73972              PX-  0  1  0  MAPPING/PHOTO             37, 9000 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            4066 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BOUNTIFUL,UT               OGDEN,UT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: CYCLIC PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON WATER
        REMARKS- LOST LATERAL CYCLIC CONTROL.SEPARATION IN SHAFT BELL PN47-725-853-5 DUE OFF CTR DRILLED HOLE.
```

## Aircraft

- Registration: [N73972](https://openairdocs.org/deregistered/N73972-2013-05-07), registration cancelled 2013-05-07, S/N 2885, built 1966 (OpenAirDocs)
- Reported make and model: BELL 47G3B1
- Registry model: [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1) (registry code 1181028) (OpenAirDocs)
- Registry engine: [Lycoming TVO-435-GIA](https://openairdocs.org/engine/lycoming-tvo-435-gia) (registry code 41526, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed

## 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 19740905040399A](https://openairdocs.org/incident/19740905040399A), Sep 5, 1974: Bell 47G3B1, Ogden, UT, Destroyed. Lost lateral cyclic control. Separation in shaft Bell PN47-725-853-5 due off ctr drilled hole.

## Other investigations on N73972 (4)

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 FTW80FA090](https://openairdocs.org/ntsb/FTW80FA090), Jul 10, 1980: Bell 47G3B1 (N73972), Mescalero, NM, destroyed
- [NTSB DEN73AD039](https://openairdocs.org/ntsb/DEN73AD039), Feb 21, 1973: Bell 47G3B1 (N73972), Salt Lake City, UT, substantial damage
- [NTSB DEN72AD011](https://openairdocs.org/ntsb/DEN72AD011), Sep 13, 1971: Bell 47G3B1 (N73972), Sandy, UT, substantial damage
- [NTSB SEA69D0057](https://openairdocs.org/ntsb/SEA69D0057), Aug 11, 1968: Bell 47G3B1 (N73972), Garden Valley, ID, destroyed

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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