As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM BECAUSE BUSS WERE LOOSEN. GCU´S WERE CHECKED, ALL CORRECT. FLIGHT DIRECTOR BUSS WAS CHECKED AND IT WAS DETECTED WITH FAIL. DFGC NR 1 WAS RESEATED AND BOTH DFGC´S WERE TESTED IAW MM 22-00-00, CORRECTING THE FAIL.