# NTSB MKC69F0078: Bell 47G-5, N7870S, Glencoe, MN, August 26, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 26, 1968
- Place: Glencoe, MN · GLENCOE, MN
- Location: 44.7696° N, 94.1510° W: Placed by OpenAirDocs: center of Glencoe, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.7696&lon=-94.1510&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 17, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 108893
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC69F0078
- Page: https://openairdocs.org/ntsb/MKC69F0078

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2807  68/8/26    GLENCOE,MINN        BELL 47G-5          CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 32, 4095
        TIME - 0600                    N7870S              PX-  0  0  0  FERRY                     TOTAL HOURS, 3525 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: DESCENDING
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           MISCELLANEOUS - FOREIGN OBJECT DAMAGE
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
        REMARKS- SPRAY BOOMS FLEXED UP STRIKING M/R.PIECES OF BROKEN BOOM SHEARED T/R SHAFT.PLT AUTOROTATED SAFELY.
```

## Aircraft

- Registration: [N7870S](https://openairdocs.org/deregistered/N7870S-1989-11-16), registration cancelled 1989-11-16, S/N 7864 (OpenAirDocs)
- Reported make and model: BELL 47G-5
- Registry model: [Bell 47G-5](https://openairdocs.org/model/bell-47g-5) (registry code 1181032) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N7870S (1)

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 MKC72FTK27](https://openairdocs.org/ntsb/MKC72FTK27), Apr 6, 1972: Bell 47G-5 (N7870S), Pierre, SD, 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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