A B767-300 ACFT RII INSPECTION NOT ACCOMPLISHED ON INSTALLED RUDDER PCA PRIOR TO FLIGHT.

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ON APR/XA/07 THE AMT ASSIGNED TO THE ACFT CONTACTED ME TO REVIEW THE ACFT LOGBOOK. HE HAD QUESTIONS ABOUT THE NEED FOR AN RII BUYOFF OF THE ACFT. THE PREVIOUS MAINT CREW WORKING THE ACFT HAD MADE AN ENTRY STATING THAT THE RUDDER PCA INSTALLED NEEDED RIG OR ADJUSTMENT DUE TO PROBS WHEN USING THE L OR CTR HYDS SYS FOR RUDDER OP. THE MAINT CREW THAT TOOK OVER ON THE ACFT SUBSEQUENTLY FOUND A FAULT LATCHED ON THE RUDDER RATIO MODULE WHICH WAS CAUSING THE PROB WITH THE L AND CTR SYS SO A RIG OR ADJUSTMENT WAS NEVER NEEDED OR PERFORMED. I CONTACTED THE MAINT OFFICE TO INQUIRE WHAT WAS CALLED FOR ON THE RII REF LIST FOUND ON THE MAINT COMPUTER. THE REF LIST SHOWED THE 'RIG/ADJ' AND 'INSTALLATION' BOTH NEEDED RII BUYOFFS. THERE WAS 1 RII STAMP IN THE LOGBOOK; WHICH I THOUGHT WAS FOR THE INSTALLATION; SO I THOUGHT THE LOGBOOK WAS IN ORDER. I FOUND OUT THE FOLLOWING DAY THAT THE RII STAMP IN THE LOGBOOK WAS ACTUALLY FOR THE 'OK TO INSTALL' AND NOT THE FINAL INSTALLATION. I IMMEDIATELY CHKED THE RII REF LIST AND FOUND OUT THAT THE 'OK TO INSTALL' IS NOT LISTED ON THE REF LIST BUT COVERED IN THE INSTRUCTIONS AT THE BEGINNING OF THE CHAPTER. I WAS TOLD THAT THE INSPECTION DEPT GAVE A ONE TIME RII AUTH TO THE DOWN-LINE STATION TO PERFORM THE INSPECTION BEFORE IT MADE ANOTHER FLT; WHICH WAS ACCOMPLISHED WITH NO PROBS FOUND WITH THE INSTALLATION. THIS DID HOWEVER CAUSE A DELAY WITH THE OUTBOUND FLT OUT OF ANOTHER ARPT. AFTER CONSIDERATION OF ALL THE EVENTS AND ACTIONS MADE BY MYSELF AND THE AMT'S PERFORMING THE WORK; I RECOMMENDED TO MY IMMEDIATE SUPERVISION THAT THE 'OK TO INSTALL' BE ADDED TO THE RII REF LIST IN AN ATTEMPT TO STOP THIS FROM HAPPENING AGAIN. I ALSO RECOMMENDED THAT MAINT TASKS THAT INVOLVE RII BUYOFFS BE WORKED OFF OF JOB INSTRUCTION CARDS WHICH HAVE DEDICATED BLOCKS FOR RII BUYOFFS. THIS WOULD TAKE THE GUESSWORK OUT OF WHETHER OR NOT A FUNCTION NEEDS AN RII OR NOT. IF THERE IS A BLOCK; THEN THERE SHOULD BE AN RII BUYOFF. THIS EVENT HAS TAUGHT ME THE CONSTANT NEED FOR ATTN TO DETAIL. IN THE FUTURE I PLEDGE TO NOT LET THE NEEDS OF THE FLT SCHEDULE HAMPER MY RESPONSIBILITIES TO THE SAFE OP OF THE ACFT. ON THE DAY OF THE EVENT; THE ACFT WAS SCHEDULED FOR AN XA30 FLT AND ALL OF THE WORK WAS WRAPPING UP JUST BEFORE DEP TIME. THIS CAUSED ME TO RUSH INSTEAD OF TAKING THE TIME NEEDED TO DO THE JOB RIGHT. I HAVE LEARNED GREATLY FROM THIS MISTAKE AND PLEDGE TO NEVER LET MY ATTN TO DETAIL AND THE SAFETY OF THE ACFT BE JEOPARDIZED AGAIN.