2005-06-13: UPDATE Maintenance and Manufacturing reported that the #1 engine oil filter bypass light illuminated in cruise. As per the checklist, the associated power lever was retarded. With the power reduction, the #1 engine low oil pressure light remained illuminated and then a precautionary shutdown was carried out. Upon inspection, WestJet maintenance discovered metallic debris in the oil system. The engine is being replaced and a teardown analysis will be carried out. SDR 20050610005 has been filed.
2005-06-15: UPDATE TSB reported that the Westjet Boeing 737-200, C-GWWJ, was operating as flight WJA 90 from Victoria, BC to Calgary, AB. Shortly after leveling off at cruise altitude, the flight crew observed a filter bypass master caution. After initiating the non-normal checklist and retarding the #1 engine (Pratt & Whitney USA JT8D-15) thrust lever, the oil pressure started to drop below normal levels. The oil pressure light came on and the engine shutdown checklist was accomplished. The flight continued to Calgary on the remaining engine and a successful single engine approach and landing was conducted with ARFF standing by. Maintenance removed and examined the main oil filter for contamination as per MM 72-00-61 and no contamination was found. A new oil filter kit was installed and was leak checked serviceable. A ground check at cruise power was carried out per MM 71-00-00 and metal contamination was found in the #1 engine oil filter. The SOAP check found high concentrations of iron. The engine was removed and sent to an overhaul facility for teardown.
2005-06-10: WJA 90, a B737-200, was en route from Vancouver to Calgary when the crew shut down the number 1 engine. They did not declare an emergency but requested ARFF eqipment to stand by. The aircraft landed safely at 1940Z, one other aircraft was extended downwind approximately 10 NM giving priority to WJA 90.


CADORS Number 2005C1161
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2005-06-09 - 19:37
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID CYYC
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, Calgary
TSB Occurrence Number A05W0107
TSB Class of Investigation Class 5
AOR Number 56859-V1
Reported By NAV CANADA
Categories System/component failure or malfunction [powerplant]

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration GWWJ | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Operator WESTJET (8893) Commercial
Make  Silhouette image of BOEING
Model 737 204
Year Built 1978
Engine Type Turbo fan
Engine Model JT8D-15
Gear Type Land
Private No
Amateur Built No
Flight Number WJA 90
Flight Rule
CARS Subpart
Phase of Flight Cruise
Damage No Damage
Fatalities 0
Injuries 0
Events Engine shut down,Engine failure

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