As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE #1 FAN BLADE HAS CU-NI-IN COATING DAMAGE PN: 340-001-036-0 S/N DM122323-M WEIGHT: 212890. GROUNDED - YES. ENGINE #1 REPLACED #1 FAN BLADE ALONG WITH #13 FAN BLADE IN PAIR. BLADES REPLACED IN REF B737-900 AMM TASK 72-21-02-000-802-F00. WHILE ACCOMPLISHING TASK FOUND #1 FAN BLADE SHIM WORN. REPLACED WITH NEW PART. #1 AND #13 FAN BLADES RESULTANT IS LOWER THAN 78 G IN. (200 CM. G).