An EMB140 during left engine oil service the tank vent line was removed. Vent line was not replaced.

Attributes
ACN	659797
Time
Date	200505
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 140 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	659797
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 2
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : inspection
Supplementary
Problem Areas	Environmental Factor Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

I performed a pre service check on aircraft. While servicing l-hand engine oil; I removed oil tank vent line. I thought I reinstalled vent line before closing the cowling. I signed off the oil check and pre service check in the logbook.

Original NASA ASRS Text

Title: AN EMB140 DURING L ENG OIL SVC THE TANK VENT LINE WAS REMOVED. VENT LINE WAS NOT REPLACED.

Narrative: I PERFORMED A PRE SVC CHK ON ACFT. WHILE SVCING L-HAND ENG OIL; I REMOVED OIL TANK VENT LINE. I THOUGHT I REINSTALLED VENT LINE BEFORE CLOSING THE COWLING. I SIGNED OFF THE OIL CHK AND PRE SVC CHK IN THE LOGBOOK.

Data retrieved from NASA's ASRS site as of January 2009 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.