Incident at Dogskin Lake, Manitoba

Summary

1997-03-21: The pilot of a Bell 206B helicopter was picking up a sling load when the long line accidentally snagged on the left skid. Upon pickup the pilot felt some instability in the load and set the load back down on the ground. A ground worker observed the helicopter's left skid dangling from the helicopter and informed the pilot. The pilot hovered the aircraft while the ground worker removed the dangling skid. The pilot then flew the helicopter back to the operator's base in Lac Du Bonnet where ground crew were able to support the helicopter to enable its shutdown. The initiating failure to the Bell high skid gear was traced to the crack in the aft cross tube at the fuselage fitting location. The crack had initiated at the top rivet holes under the P/N 206-050-110 strap on the crosstube and had progressed approximately two-thirds of the way around the circumference of the tube prior to its failure. It is believed that when the long line caught the skid during the lift attempt, the weight of the sling load snapped the remaining portion of the tube, causing the skid to separate. The crack location has been identified by the manufacturer as an ongoing problem with a history of past service fatigue. In April of 1994 the manufacturer issued several alert service bulletins covering the full range of 206 helicopter landing gear. The service bulletins (206-94-78 for the 206A/B models) call for the replacement of all subject crosstubes with an improved crosstube, no later than 30 September 1994. Presently there is no Airworthiness directive mandating the replacement of the Bell crosstubes. The failed crosstube was an original model with approximately 14,000 hours time in service at the time of the occurrence.

Details


CADORS Number 1995C0050
Occurrence Type Incident
Reported By
Occurred At 1995-02-21 - 23:00
Day or Night?
Fatalities 0
Injuries
Aerodrome ID
Aerodrome Name
Geographic Location Manitoba, Canada, North America, Prairie and Northern Region, Dogskin Lake, Manitoba
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By
Categories System/component failure or malfunction [non-powerplant]
Events



Aircraft Details (1 aircraft)

Type Helicopter
 Silhouette image of Helicopter
Canadian Registration GOXY | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Owner PROVINCIAL HELICOPTERS LTD
Operator PROVINCIAL HELICOPTERS LTD. (8198) Commercial
Make  Silhouette image of BELL
BELL
Model 206B
Year Built 1974
Engine Type Turbo shaft
Engine Make
Engine Model
Gear Type
Private No
Amateur Built No
Flight Number
Flight Rule
CARS Subpart
Phase of Flight Unknown
Damage Unknown
Fatalities 0
Injuries 0
Events Landing gear

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