A B767-300 ETOPS ACFT R HYD SYSTEM QUANTITY WAS NOT VISUALLY CHECKED PRIOR TO DEPARTURE; AS REQUIRED PER THE MEL.

Narrative

FLT X WAS SCHEDULED FOR ETOPS WKLY; ETOPS DAILY RELIABILITY; AND ETOPS PREDEP MAINT CHKS. THE ACFT WAS ALSO SET UP TO PERFORM OP ABC; AN ELEVATOR PCA BELL CRANK CHK; AND OP XYZ AIRWORTHINESS DIRECTIVE ENTRY/SERVO DOOR COUNTER BAL OP CHK; PLUS 7 OTHER MAINT ITEMS WERE CORRECTED AND DOCUMENTED IN THE ACFT LOGBOOK. THE R HYD QUANTITY WAS PREVIOUSLY DEFERRED PER MEL AND REQUIRED A REPETITIVE CHK BEFORE EACH FLT. A TOTAL OF 5 AMT'S WERE ASSIGNED TO COMPLETE THE MAINT TASKS. THE ACFT HAD ONLY 3 HRS OF GND TIME. AFTER THE ACFT WAS DISPATCHED; IT WAS DISCOVERED THAT THE REPETITIVE CHK WAS NOT COMPLIED WITH. THIS IS A VIOLATION OF THE OPS/INSPECTION MANUAL MAINT CARRY-OVER. I WAS ONE OF THE 5 AMT'S THAT UNINTENTIONALLY DID NOT COMPLY WITH THE REP CHK. I ASSUMED ONE OF THE OTHER AMT'S COMPLIED WITH THE REP CHK. I BELIEVE THE AMOUNT OF WORK SCHEDULED AND THE SHORT GND TIME CONTRIBUTED TO THE MISSED REP CHK. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THE HYD QUANTITY IS VISUALLY CHECKED AT THE MAINT HYD SERVICING PANEL BY POSITIONING THE SELECTOR HANDLE TO THE APPROPRIATE HYDRAULIC SYSTEM (LEFT; CENTER OR RIGHT). ALTHOUGH ONLY ONE GAUGE IS VIEWED; ANY SYSTEM SELECTED WILL BE A DIRECT READING QUANTITY. REPORTER ALSO RESTATED THE AMOUNT OF WORK BEING DEMANDED OF THE MECHANICS TO ACCOMPLISH IN SUCH A SHORT WINDOW OF GROUND TIME (ONLY THREE HOURS); DID CONTRIBUTE TO MISSING THE REQUIRED RIGHT HYD SYSTEM VISUAL VERIFICATION.