A B767-300 RELIEF PILOT REPORTS ON QUESTIONABLE MAINT TROUBLE SHOOTING AND SIGNING OFF OF THE RIGHT AIR DATA COMPUTER; PLACARDING OF THE FO'S AIRSPEED INDICATOR AND RIGHT AUTOPILOT. AOA VANE FOUND DAMAGED.

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THE CAPT QUESTIONED THE PLACARDING OF THE FO AIRSPD INDICATOR (GREAT SMART MOVE; CAPT -- KUDOS!) AND THE R AUTOPLT FROM A PREVIOUS WRITE-UP 3-4 DAYS PRIOR. THE R AUTOPLT WAS ALSO PLACARDED FROM THE NEXT DAY; I BELIEVE. WHEN QUESTIONED ABOUT THE ORIGINAL WRITE-UP DURING PREFLT; MAINT DECIDED TO CHANGE THE R ADC. THE ORIGINAL WRITE-UP HAD 2 PROBS LISTED. MAINT PLACARDED THE FO'S SPD TAPE FROM THAT WRITE-UP. BUT IT REFED ANOTHER POSSIBLE DISCREPANCY ALSO. MAINT SIGNOFF OF THAT ORIGINAL WRITE-UP INCLUDED THAT THE ADC WAS OK! (WHICH MAKES ME WONDER WHY THEY CHANGED THEIR MIND AND WANTED TO CHANGE THAT PIECE.) WHILE CHANGING THE ADC THE MAINT GUY CHKED AND FOUND THE R ANGLE OF ATTACK VANE WAS BROKEN AND DECIDED THAT NEEDED TO BE CHANGED AS WELL. MAINT GUY SHOWED US THE ANGLE OF ATTACK VANE AND SAID THAT A STATIC DISCHARGE CAUSED THE PROB (VISIBLE DISCOLORING; ETC). MAINT AID THEY WERE TAKING THE ACFT OTS EVEN THOUGH THE GUY SAID HE COULD HAVE THE ACFT READY IN 20 MINS. THE MAINT PEOPLE HAD ALREADY TAKEN THE LOGBOOK; I QUESTIONED HIM ABOUT WHETHER A LIGHTNING STRIKE INSPECTION WAS GOING TO BE DONE OR NOT; AND HE DID NOT KNOW. THE REASON I AM SENDING THIS IS THAT I AM NOT SURE PROPER CHKS/ANALYSIS WAS DONE AFTER THE FIRST WRITE-UP. SECONDLY; I WANT TO GIVE A KUDOS TO THE MAINT GUY WHO FOUND THE ANGLE OF ATTACK VANE BUSTED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THE RIGHT ANGLE OF ATTACK (AOA) VANE WAS DAMAGED FROM STATIC DISCHARGE LIMITING THE SMOOTH ROTATION OF THE VANE AIRFOIL. REPORTER STATED THERE WAS A ROUGH FEEL AND A GRINDING SOUND WHEN HE AND THE MECHANIC TRIED TO ROTATE THE VANE.