Incident at ST. JOHN'S INTL NL (CYYT)


2010-06-10: CHI21, Sikorsky S92A, enroute from St. John?s (CYYT) to the Terra Nova Oil Platform (CTNV), at 15:09Z, 55 nautical miles southeast of St. John?s, requested clearance direct to St. John?s due to a warning light indication for the gear box. No emergency was declared. The flight was cleared as requested and landed at 15:36Z. TSB Case Closed.
2010-06-22: UPDATE TSB: A10A0065: CHI-21, The Cougar Helicopter S92 (registration C-GMCH) enroute from St John's to the Terra Nova Oil Platform was 55 SE of St John's at 1506 UTC when a main gear box bypass caution light illuminated. The crew requested to return to St John's and landed at 1536 UTC. No emergency was declared. It was reported that the bypass switch was in the normal position when the MGB OIL BYPASS caution segment illuminated. This was followed by a slight increase in the MGB oil pressure and the temperature increased two or three degrees. Maintenance found that the internal switch in the MGB Bypass Valve assembly (P/N 92351-15809-102) showed a high electrical resistance. A replacement valve was ordered and maintenance is waiting for the installation of the replacement valve to confirm the diagnosis. More information will be provided to TSB following the maintenance action.


CADORS Number 2010A0500
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2010-06-09 - 15:09
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID CYYT
Aerodrome Name ST. JOHN'S INTL NL (CYYT)
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region, St. John`s Intl (CYYT)
TSB Occurrence Number A10A0065
TSB Class of Investigation Class 5
AOR Number 119935-V1
Reported By NAV CANADA
Categories System/component failure or malfunction [non-powerplant],Other

Aircraft Details (1 aircraft)

Type Helicopter
 Silhouette image of Helicopter
Canadian Registration GMCH | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Operator COUGAR HELICOPTERS INC. (4791) Commercial
Make  Silhouette image of SIKORSKY
Model S92A
Year Built 2005
Engine Type Turbo shaft
Engine Model CT7-8A
Gear Type Land
Private No
Amateur Built No
Flight Number CHI21
Flight Rule
CARS Subpart
Phase of Flight Cruise
Damage No Damage
Fatalities 0
Injuries 0
Events Diversion,Transmission problem

Leave a Comment