# NTSB MKC69F0129: Bell 47G-2, N5163B, Keystone, SD, August 7, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 7, 1968
- Place: Keystone, SD · KEYSTONE, SD
- Location: 43.8949° N, 103.4268° W: Placed by OpenAirDocs: center of Keystone, SD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.8949&lon=-103.4268&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report October 16, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 108846
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC69F0129
- Page: https://openairdocs.org/ntsb/MKC69F0129

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2737   68/8/7    KEYSTONE,S DAK      BELL 47G-2          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 29, 1450
        TIME - 0815                    N5163B              PX-  0  0  2  OTHER                     TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - KEYSTONE HELIPORT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           POWERPLANT - LUBRICATING SYSTEM: FILTERS,SCREEN
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
           MISCELLANEOUS ACTS,CONDITIONS - OIL STARVATION
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- LOCAL SIGHTSEEING FLT.OIL SCREEN INSTALLED UPSIDE DOWN,COLLAPSED.NOS 1,3 RODS BROKE-LACK OF OIL.
```

## Aircraft

- Registration: N5163B (not matched to a registry record)
- Reported make and model: BELL 47G-2
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Keystone Heliport

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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