A B737-200 diverted due to a loss of #1 engine oil pressure and quantity caused by a torn oil cooler...

Attributes
ACN	369652
Time
Date	199705
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	369652
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

ZZZ technician changed oil filters on left and right engines, ran engines for leak check per maintenance manual. Found line leaking at fuel oil cooler on left engine, right engine no leaks noted. Tightened line at fuel oil cooler and re-safetied fitting. Ran left engine, no leaks noted. Lost oil pressure and quantity en route, ZZZ-XXX. Shut left engine down, diverted to BBB. Replaced seal on line at left engine fuel oil cooler fitting. Found old seal torn. Also technician also changed left engine oil filter seal. Seals sent to engineering for evaluation.

Original NASA ASRS Text

Title: A B737-200 DIVERTED DUE TO A LOSS OF #1 ENG OIL PRESSURE AND QUANTITY CAUSED BY A TORN OIL COOLER LINE SEAL.

Narrative: ZZZ TECHNICIAN CHANGED OIL FILTERS ON L AND R ENGS, RAN ENGS FOR LEAK CHK PER MAINT MANUAL. FOUND LINE LEAKING AT FUEL OIL COOLER ON L ENG, R ENG NO LEAKS NOTED. TIGHTENED LINE AT FUEL OIL COOLER AND RE-SAFETIED FITTING. RAN L ENG, NO LEAKS NOTED. LOST OIL PRESSURE AND QUANTITY ENRTE, ZZZ-XXX. SHUT L ENG DOWN, DIVERTED TO BBB. REPLACED SEAL ON LINE AT L ENG FUEL OIL COOLER FITTING. FOUND OLD SEAL TORN. ALSO TECHNICIAN ALSO CHANGED L ENG OIL FILTER SEAL. SEALS SENT TO ENGINEERING FOR EVALUATION.

Data retrieved from NASA's ASRS site as of July 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.

A B737-200 diverted due to a loss of #1 engine oil pressure and quantity caused by a torn oil cooler line seal.