A dhc-8-400 on arrival technician observed #2 engine oil leak. On opening cowling discovered oil filler cap missing. Added engine oil and replaced cap.

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Attributes
ACN	695230
Time
Date	200604
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Controlling Facilities	tower : sdf.tower
Operator	common carrier : air carrier
Make Model Name	Dash 8-400
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
ASRS Report	695230
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : inspection
Supplementary
Problem Areas	Aircraft Chart Or Publication Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Maintenance personnel approached the aircraft for the purpose first officer doing a daily inspection. During the course of the inspection; a #2 engine oil leak was noted. Inspection of the engine revealed the oil service cap/dipstick laying in the bottom of the cowl in a pool of oil. Engine was wiped clean; serviced with 8 pints of engine oil and the oil service cap was properly secured. Aircraft was returned to service.

Original NASA ASRS Text

Title: A DHC-8-400 ON ARRIVAL TECHNICIAN OBSERVED #2 ENGINE OIL LEAK. ON OPENING COWLING DISCOVERED OIL FILLER CAP MISSING. ADDED ENGINE OIL AND REPLACED CAP.

Narrative: MAINT PERSONNEL APPROACHED THE ACFT FOR THE PURPOSE FO DOING A DAILY INSPECTION. DURING THE COURSE OF THE INSPECTION; A #2 ENG OIL LEAK WAS NOTED. INSPECTION OF THE ENG REVEALED THE OIL SVC CAP/DIPSTICK LAYING IN THE BOTTOM OF THE COWL IN A POOL OF OIL. ENG WAS WIPED CLEAN; SERVICED WITH 8 PINTS OF ENG OIL AND THE OIL SERVICE CAP WAS PROPERLY SECURED. ACFT WAS RETURNED TO SVC.

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.