Incident at Cape St. Lawrence


2010-11-16: A10A0106: C-GCHW, a Transport Canada MBB BO 105 helicopter with one pilot and two passengers on board, was departing Cape St. Lawrence, NS for a local flight. At approximately 6 to 10 feet above the ground while in translation, the number two engine (Allison 250-C20B) power degraded to approximately 40 percent N1. The pilot landed safely without further incident. There was no damage to the aircraft and the occupants exited the aircraft uninjured. During the landing, the Mast Moment indicator light illuminated and the number one engine torque was observed indicating above 110 percent. UPDATE - 8 October 2010: Maintenance inspection revealed that the compressor discharge P3 airline to the fuel control unit had disconnected due to a loose B-nut. Maintenance personnel are repairing the aircraft at the incident site after which it will be ferried to the main base at Shearwater on a flight permit.


CADORS Number 2010A1171
Occurrence Type Incident
Reported By Transportation Safety Board of Canada
Occurred At 2010-09-30 - 16:00
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID
Aerodrome Name
Geographic Location Nova Scotia, Canada, North America, Atlantic Region, Cape St. Lawrence
TSB Occurrence Number A10A0106
TSB Class of Investigation Class 5
AOR Number
Reported By Transportation Safety Board of Canada
Categories System/component failure or malfunction [powerplant]

Aircraft Details (1 aircraft)

Type Helicopter
 Silhouette image of Helicopter
Canadian Registration GCHW | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Operator State
Model BO105 S CDN BS 4
Year Built 1985
Engine Type Turbo shaft
Engine Make ALLISON
Engine Model  Silhouette image of 250-C20B
Gear Type Land
Private No
Amateur Built No
Flight Number
Flight Rule
CARS Subpart
Phase of Flight Climb
Damage No Damage
Fatalities 0
Injuries 0
Events Engine - malfunction

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