As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING POST D-CHECK FERRY FLIGHT, RETURNED TO DEPARTURE DUE TO AUTO PILOT CAPTURE LOC VERY SLUGGISH AND OVERSHOOTS DURING CORRECTION. WILL NOT CAPTURE GLIDE SLOPE. ALSO, RADIO ALTIMETER DH LIGHT COMES ON WHEN DH IS SET ABOVE 2500 FT AGL STARTS INDICATING WHEN PASSING 600 FT, INDICATOR FLICKERS WILDLY UPON READING DH. DURING CLIMB BETWEEN 4000 AND 5000 RAD ALT FLAGG APPEARED BRIEFLY.