What was found
(CAN) REPORTED FAULTY NR2 RMI COMPASS BEARING, ADF INDICATION ON RMI NR1, NR2 BOTH NEEDLES WITH NO FLAGS. WHEN BOTH RMI S HAVE NEEDLES NR1, NR2 SELECTED TO NAV COMPASS INDICATION ON NR 2 RMI FREEZES NON IT S CURRENT HEADING. NR 2 RMI COMPASS CANNOT BE SLAVED WITH NR 1 HEADING SWITCH IN MANUAL OR FREE MODES, NO HEADING FLAG IS DISPLAYED ON NR 2 RMI. STORM SCOPE ALSO DISPLAYS FAULTY HDG INFO AND IS NOT FLAGGED. RMI NEEDLES SELECTED TO ADF, NR 1 & 2 NEEDLES INDICATE 180 DEGREES OFF TRUE ADF BEARING. THE RMI, ADF NEEDLES DO NOT DEFLECT IN TEST MODE. EHSI, ADF NEEDLE INDICATES NORMALLY AND DEFLECTSIN TEST. THE ADF AUDIO IS RECEIVED NORMALLY. REPLACING THE GPS SWITCHING UNIT PN AIS200-35 CLEARS ALL FAULTS.