A B727 returned to the field due to loss of oil quantity and pressure in #2 engine.

Attributes
ACN	347693
Time
Date	199609
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	347693
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	347554
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On sep/xx/96 I performed an 'a' check on aircraft using as reference job paperwork ZZZZ. I replaced main oil filters and all o-rings, then dry motored all engines to check for leaks reference job paperwork item 110 -- no leaks were noted. Plane returned to gate. After takeoff upon further investigation, found o-ring cut on #2 mail oil filter which caused loss of oil

Original NASA ASRS Text

Title: A B727 RETURNED TO THE FIELD DUE TO LOSS OF OIL QUANTITY AND PRESSURE IN #2 ENG.

Narrative: ON SEP/XX/96 I PERFORMED AN 'A' CHK ON ACFT USING AS REF JOB PAPERWORK ZZZZ. I REPLACED MAIN OIL FILTERS AND ALL O-RINGS, THEN DRY MOTORED ALL ENGS TO CHK FOR LEAKS REF JOB PAPERWORK ITEM 110 -- NO LEAKS WERE NOTED. PLANE RETURNED TO GATE. AFTER TKOF UPON FURTHER INVESTIGATION, FOUND O-RING CUT ON #2 MAIL OIL FILTER WHICH CAUSED LOSS OF OIL

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.