A B737-300 was dispatched in non compliance with an oil seep on #2 CSD due to a missing seal.

Attributes
ACN	478007
Time
Date	200006
Day	Thu
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
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 : lead technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance lead technician : 8 maintenance technician : 27
ASRS Report	478007
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance
Independent Detector	other other : person 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : installation performance deficiency : testing performance deficiency : fault isolation performance deficiency : repair
Supplementary
Problem Areas	Maintenance Human Performance Company Chart Or Publication Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

After replacement of #2 CSD, 2 oil leaks were detected on the new unit. 1 leak was fixed with a new seal. The second leak was so small (1 drop after 4 mins with the engine running) that I considered it to be no leak. After the aircraft departed, one of the mechanics who had installed the CSD called the maintenance office to advise us that he thought he had left a seal off the new unit in the area of the oil leak. The aircraft was stopped at its first destination and the seal installed.

Original NASA ASRS Text

Title: A B737-300 WAS DISPATCHED IN NON COMPLIANCE WITH AN OIL SEEP ON #2 CSD DUE TO A MISSING SEAL.

Narrative: AFTER REPLACEMENT OF #2 CSD, 2 OIL LEAKS WERE DETECTED ON THE NEW UNIT. 1 LEAK WAS FIXED WITH A NEW SEAL. THE SECOND LEAK WAS SO SMALL (1 DROP AFTER 4 MINS WITH THE ENG RUNNING) THAT I CONSIDERED IT TO BE NO LEAK. AFTER THE ACFT DEPARTED, ONE OF THE MECHS WHO HAD INSTALLED THE CSD CALLED THE MAINT OFFICE TO ADVISE US THAT HE THOUGHT HE HAD LEFT A SEAL OFF THE NEW UNIT IN THE AREA OF THE OIL LEAK. THE ACFT WAS STOPPED AT ITS FIRST DEST AND THE SEAL INSTALLED.

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.