A pilot observed an engine oil loss and made a precautionary landing at cdw.

Attributes
ACN	446166
Time
Date	199908
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cdw.airport
State Reference	NJ
Altitude	msl single value : 7300
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 310 flight time total : 1560 flight time type : 45
ASRS Report	446166
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed as precaution
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Shortly after takeoff, oil was visible on windscreen. After bringing it to the attention of the aircraft owner, I was instructed that he had spilled oil while adding some. The amount of splatter was negligible and it appeared to not be increasing in size or magnitude. After checking engine instruments, all seemed to be normal. Then 20 mins later, oil began splattering the windshield again and engine instruments indicated a loss of engine oil. At that time I advised ATC of the problem and initiated a precautionary landing at cdw airport. Upon landing, oil was visible on most of the left side of aircraft. Postflt inspection indicated that the oil filler cap had come loose.

Original NASA ASRS Text

Title: A PLT OBSERVED AN ENG OIL LOSS AND MADE A PRECAUTIONARY LNDG AT CDW.

Narrative: SHORTLY AFTER TKOF, OIL WAS VISIBLE ON WINDSCREEN. AFTER BRINGING IT TO THE ATTN OF THE ACFT OWNER, I WAS INSTRUCTED THAT HE HAD SPILLED OIL WHILE ADDING SOME. THE AMOUNT OF SPLATTER WAS NEGLIGIBLE AND IT APPEARED TO NOT BE INCREASING IN SIZE OR MAGNITUDE. AFTER CHKING ENG INSTS, ALL SEEMED TO BE NORMAL. THEN 20 MINS LATER, OIL BEGAN SPLATTERING THE WINDSHIELD AGAIN AND ENG INSTS INDICATED A LOSS OF ENG OIL. AT THAT TIME I ADVISED ATC OF THE PROB AND INITIATED A PRECAUTIONARY LNDG AT CDW ARPT. UPON LNDG, OIL WAS VISIBLE ON MOST OF THE L SIDE OF ACFT. POSTFLT INSPECTION INDICATED THAT THE OIL FILLER CAP HAD COME LOOSE.

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.