As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TC SBCFM56-7B-72-0986-1 FOR THE NR 1 ENGINE, FOUND THE SLAB HEADED ANTI-ROTATION PINS AT THE 3:00 AND 9:00 POSITIONS OF THE STAGE 3 TO HAVE ROTATED MORE THAN ZERO BUT LESS THAN 45 DEGREES. ACFT GROUNDED. THE NR 1 ENGINE WAS REPLACED.