A B737-300 was dispatched in non compliance with #2 engine oil tank filler cap not secured.

Attributes
ACN	485102
Time
Date	200009
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : yum.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 25
ASRS Report	485102
Person 2
Affiliation	company : air carrier
Function	maintenance : lead technician
Qualification	technician : powerplant technician : airframe
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : #2 engine oil qty indicator other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : installation performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Maintenance Human Performance Company Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

When servicing oil to the #2 engine, oil cap was left open, oil service door was left open. Then left the aircraft with the oil cap off of the engine. Then started to indicate oil lost on the #2 engine, and had an air return back to ZZZ. The engine was not shut down, it still had enough oil to return.

Original NASA ASRS Text

Title: A B737-300 WAS DISPATCHED IN NON COMPLIANCE WITH #2 ENG OIL TANK FILLER CAP NOT SECURED.

Narrative: WHEN SVCING OIL TO THE #2 ENG, OIL CAP WAS LEFT OPEN, OIL SVC DOOR WAS LEFT OPEN. THEN LEFT THE ACFT WITH THE OIL CAP OFF OF THE ENG. THEN STARTED TO INDICATE OIL LOST ON THE #2 ENG, AND HAD AN AIR RETURN BACK TO ZZZ. THE ENG WAS NOT SHUT DOWN, IT STILL HAD ENOUGH OIL TO RETURN.

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.