Air carrier medium large transport in-flight engine shutdown due to clogged oil filter.

Attributes
ACN	103755
Time
Date	198902
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : stl
State Reference	MO
Altitude	msl bound lower : 37000 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute airway : j45
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 17000 flight time type : 5000
ASRS Report	103755
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

The #2 engine oil filter bypass light illuminated. The appropriate abnormal procedures in the pilots operating manual were followed leading to a precautionary engine shutdown of the #2 engine. Initially got clearance to lower altitude with additional clearance to divert to lambert-stl. Declared an emergency and fire equipment stood by. Appropriate checklists were accomplished, F/a's were briefed and they prepared the passenger for landing. A visibility approach and landing were uneventfully accomplished. Now, for the reason for this report: maintenance has changed to a new engine oil which cleans carbon into the oil. This carbon plugged up the oil filter in the #2 engine during my flight. My emphatic recommendation is to inspect and change the oil filters with higher frequency to preclude recurrence of this type of situation.

Original NASA ASRS Text

Title: ACR MLG INFLT ENGINE SHUTDOWN DUE TO CLOGGED OIL FILTER.

Narrative: THE #2 ENG OIL FILTER BYPASS LIGHT ILLUMINATED. THE APPROPRIATE ABNORMAL PROCS IN THE PLTS OPERATING MANUAL WERE FOLLOWED LEADING TO A PRECAUTIONARY ENG SHUTDOWN OF THE #2 ENG. INITIALLY GOT CLRNC TO LOWER ALT WITH ADDITIONAL CLRNC TO DIVERT TO LAMBERT-STL. DECLARED AN EMER AND FIRE EQUIP STOOD BY. APPROPRIATE CHKLISTS WERE ACCOMPLISHED, F/A'S WERE BRIEFED AND THEY PREPARED THE PAX FOR LNDG. A VIS APCH AND LNDG WERE UNEVENTFULLY ACCOMPLISHED. NOW, FOR THE REASON FOR THIS RPT: MAINT HAS CHANGED TO A NEW ENG OIL WHICH CLEANS CARBON INTO THE OIL. THIS CARBON PLUGGED UP THE OIL FILTER IN THE #2 ENG DURING MY FLT. MY EMPHATIC RECOMMENDATION IS TO INSPECT AND CHANGE THE OIL FILTERS WITH HIGHER FREQ TO PRECLUDE RECURRENCE OF THIS TYPE OF SITUATION.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.