A cessna 310 pilot observed oil flowing from the right engine oil filler area on takeoff from eug.

Attributes
ACN	445017
Time
Date	199908
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : eug.airport
State Reference	OR
Altitude	msl single value : 1300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : eug.tower
Operator	general aviation : corporate
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Route In Use	departure : vfr
Flight Plan	None
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : commercial pilot : instrument pilot : cfi
Experience	flight time last 90 days : 30 flight time total : 1150 flight time type : 20
ASRS Report	445017
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : landed as precaution
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On departure, I turned for a right downwind departure when I noticed oil spewing out of the filler door on the right engine nacelle. I promptly told ATC that I needed an immediate landing on runway 16 (departure runway was runway 21). ATC vectored a C172 that was on final for runway 16 around in a left 360 degree and they cleared me for runway 16. Landing was uneventful and oil pressure never left the green arc on the gauge. After shutdown, the fire trucks came to investigate and we found the oil filler cap was dangling by the security chain. We had lost 3 of 12 quarts. I realized that a lack of a thorough preflight was the culprit. I didn't catch that the rookie line technician did not secure the filler cap because I assumed he knew. My fault and I realize even unexpected changes can happen to your plane in your absence, so a thorough preflight is imperative.

Original NASA ASRS Text

Title: A CESSNA 310 PLT OBSERVED OIL FLOWING FROM THE R ENG OIL FILLER AREA ON TKOF FROM EUG.

Narrative: ON DEP, I TURNED FOR A R DOWNWIND DEP WHEN I NOTICED OIL SPEWING OUT OF THE FILLER DOOR ON THE R ENG NACELLE. I PROMPTLY TOLD ATC THAT I NEEDED AN IMMEDIATE LNDG ON RWY 16 (DEP RWY WAS RWY 21). ATC VECTORED A C172 THAT WAS ON FINAL FOR RWY 16 AROUND IN A L 360 DEG AND THEY CLRED ME FOR RWY 16. LNDG WAS UNEVENTFUL AND OIL PRESSURE NEVER LEFT THE GREEN ARC ON THE GAUGE. AFTER SHUTDOWN, THE FIRE TRUCKS CAME TO INVESTIGATE AND WE FOUND THE OIL FILLER CAP WAS DANGLING BY THE SECURITY CHAIN. WE HAD LOST 3 OF 12 QUARTS. I REALIZED THAT A LACK OF A THOROUGH PREFLT WAS THE CULPRIT. I DIDN'T CATCH THAT THE ROOKIE LINE TECHNICIAN DID NOT SECURE THE FILLER CAP BECAUSE I ASSUMED HE KNEW. MY FAULT AND I REALIZE EVEN UNEXPECTED CHANGES CAN HAPPEN TO YOUR PLANE IN YOUR ABSENCE, SO A THOROUGH PREFLT IS IMPERATIVE.

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.