Narrative:

On apr/wed/06 aircraft was at the ZZZ hangar for a 'C' check. I was assigned as the engine inspector. The right engine CSD was not svced properly and the aircraft returned to the gate after pushback. During the 'C' check; I saw mechanic with the oil service cart at the right engine. I saw pumping oil into the engine starter and assumed all the oil servicing required in that area would be completed. I then moved on to do other work assignments; ie; fan blade inspection; borescope; and inspection under open panel. After the paperwork for the blades; borescope and panel close-up had been completed; I looked around the engine to make sure everything was closed up properly. I did not see the oil service cart any longer and assumed the oil servicing was completed. I checked the safeties of all the filters that were changed. I did not notice the lack of oil in the CSD. It was my responsibility to verify proper oil servicing and I missed it.

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Original NASA ASRS Text

Title: B747-300 WAS RELEASED FROM A HVY CHK WITH #2 CONSTANT SPD DRIVE OIL NOT SVCED. CSD DEFERRED FOR REPLACEMENT.

Narrative: ON APR/WED/06 ACFT WAS AT THE ZZZ HANGAR FOR A 'C' CHK. I WAS ASSIGNED AS THE ENG INSPECTOR. THE R ENG CSD WAS NOT SVCED PROPERLY AND THE ACFT RETURNED TO THE GATE AFTER PUSHBACK. DURING THE 'C' CHK; I SAW MECH WITH THE OIL SVC CART AT THE R ENG. I SAW PUMPING OIL INTO THE ENG STARTER AND ASSUMED ALL THE OIL SVCING REQUIRED IN THAT AREA WOULD BE COMPLETED. I THEN MOVED ON TO DO OTHER WORK ASSIGNMENTS; IE; FAN BLADE INSPECTION; BORESCOPE; AND INSPECTION UNDER OPEN PANEL. AFTER THE PAPERWORK FOR THE BLADES; BORESCOPE AND PANEL CLOSE-UP HAD BEEN COMPLETED; I LOOKED AROUND THE ENG TO MAKE SURE EVERYTHING WAS CLOSED UP PROPERLY. I DID NOT SEE THE OIL SVC CART ANY LONGER AND ASSUMED THE OIL SVCING WAS COMPLETED. I CHKED THE SAFETIES OF ALL THE FILTERS THAT WERE CHANGED. I DID NOT NOTICE THE LACK OF OIL IN THE CSD. IT WAS MY RESPONSIBILITY TO VERIFY PROPER OIL SVCING AND I MISSED IT.

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.