A DC9-30 was dispatched in non compliance with the #2 engine oil filler cap not installed.

Attributes
ACN	527072
Time
Date	200110
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Experience	maintenance technician : 3
ASRS Report	527072
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure
Independent Detector	other other : person 2
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	performance deficiency : logbook entry performance deficiency : scheduled maintenance performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Upon arriving in ZZZ, us, excessive oil was discovered on the engine cowling of the #2 engine. Upon further inspection it was found that the oil tank cap was unsecured. The engine was svced with 6 quarts of oil and continued flight service. I svced the engine oil the previous night and it is believed that I may have left the oil tank cap for the #2 engine unsecured, causing the loss of 6 quarts of oil. I have a good system for ensuring that the oil tank caps are secure, but it is possible that I may have erred on this occasion, although I believe I secured the #2 oil cap properly. It was nighttime, with good WX conditions and no distractions. When the unsecured oil cap was found, it was stated that it was sitting in the scupper. At no time in my oiling procedure, does the oil cap situation, rest on, or otherwise come in contact with the scupper.

Original NASA ASRS Text

Title: A DC9-30 WAS DISPATCHED IN NON COMPLIANCE WITH THE #2 ENG OIL FILLER CAP NOT INSTALLED.

Narrative: UPON ARRIVING IN ZZZ, US, EXCESSIVE OIL WAS DISCOVERED ON THE ENG COWLING OF THE #2 ENG. UPON FURTHER INSPECTION IT WAS FOUND THAT THE OIL TANK CAP WAS UNSECURED. THE ENG WAS SVCED WITH 6 QUARTS OF OIL AND CONTINUED FLT SVC. I SVCED THE ENG OIL THE PREVIOUS NIGHT AND IT IS BELIEVED THAT I MAY HAVE LEFT THE OIL TANK CAP FOR THE #2 ENG UNSECURED, CAUSING THE LOSS OF 6 QUARTS OF OIL. I HAVE A GOOD SYS FOR ENSURING THAT THE OIL TANK CAPS ARE SECURE, BUT IT IS POSSIBLE THAT I MAY HAVE ERRED ON THIS OCCASION, ALTHOUGH I BELIEVE I SECURED THE #2 OIL CAP PROPERLY. IT WAS NIGHTTIME, WITH GOOD WX CONDITIONS AND NO DISTRACTIONS. WHEN THE UNSECURED OIL CAP WAS FOUND, IT WAS STATED THAT IT WAS SITTING IN THE SCUPPER. AT NO TIME IN MY OILING PROCEDURE, DOES THE OIL CAP SIT, REST ON, OR OTHERWISE COME IN CONTACT WITH THE SCUPPER.

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.