# NTSB FTW80FPM14: Bell 47G, N16657, Calvin, OK, July 16, 1980

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 16, 1980
- Place: Calvin, OK · CALVIN, OK
- Location: 34.9664° N, 96.2499° W: Placed by OpenAirDocs: center of Calvin, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.9664&lon=-96.2499&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report October 27, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 129725
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW80FPM14
- Page: https://openairdocs.org/ntsb/FTW80FPM14

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2322  80/7/16    CALVIN,OK           BELL 47G            CR-  1  0  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1500                    N16657              PX-  0  0  0  AERIAL APPLICATION        AGE 32, 7800 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            1000 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CALVIN,OK                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: PROCEDURE TURNAROUND
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           INSTRUMENTS/EQUIPMENT AND ACCESSORIES - MISCELLANEOUS EQUIPMENT: SPRAY,DUSTING EQUIPMENT
           MISCELLANEOUS ACTS,CONDITIONS - LATERAL IMBALANCE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1500                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - OTHER                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  700                 SWATH RUN-HOW FLOWN - CROSSWIND
        REMARKS- RT SPRAY TANK SEPARATED INFLIGHT CAUSING SEVERE LATERAL CG IMBALANCE.
```

## Aircraft

- Registration: [N16657](https://openairdocs.org/deregistered/N16657-2012-08-10), registration cancelled 2012-08-10, S/N K7124 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Bell-K-Copter 47G](https://openairdocs.org/model/bell-k-copter-47g) (registry code 1181065) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (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 19800716029339A](https://openairdocs.org/incident/19800716029339A), Jul 16, 1980: Bell 47G, Calvin, OK, Destroyed. Right spray tank on helicopter fell off,unbalanced aircraft rolled inverted found attach fittings rusty and cracked

## Other investigations on N16657 (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 FTW77FPM13](https://openairdocs.org/ntsb/FTW77FPM13), Jun 15, 1977: Bell 47G (N16657), Copan, OK, substantial damage
- [NTSB FTW70FPD05](https://openairdocs.org/ntsb/FTW70FPD05), Mar 5, 1970: Bell 47G (N16657), Fort Worth, TX, substantial damage
- [NTSB FTW69F0491](https://openairdocs.org/ntsb/FTW69F0491), May 2, 1969: Bell 47G (N16657), Fort Worth, TX, 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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