As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH BOTH PILOT PFD'S WAS INTERMITTENTLY LOSING LOCALIZER & G SLOPE 5 TIMES ON 20 MILE FINAL TO LANDING. COULD NOT DUPLICATE DISCREPANCY NAV SYS TEST OK IAW AMM 34-51-00. TEST SET ON FOR 20+ MINUTES NEVER LOST G/S OR LOCALIZER ON EITHER SIDE.