What was found
CAPTAIN REPORTED THAT DURING FINAL APPROACH, BOTH VHF NAVIGATORS IN THE SAME RADIAL SHOWED A DEVIATION OF 20 DEGREES IN THE TRAJECTORY, THE DIFFERENCE CONTINUED UNTIL LANDING AND RAMP. MAINT REPLACED VOR NR 1, VHF/ILS NAV 1 AND AHRS IAW MM 34-43-01 AND 34-22-02, BUT FAILURE CONTINUED, SO FAILURE WAS DEFERRED IAW MEL 34-21, CATEGORY (C). THE TX/RX VOR NR 2 AND LT RDMI WERE REPLACED IAW MM 34-22-02 AND 34-21-12, TESTED CORRECT. DURING OVERNIGHT CHECK, VOR/ILS SYS WAS TESTED IAW MM 34-22-01, ALL CORRECT.