As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING COMBUSTION LINER MX, IT WAS NOTICED THAT WELDING OPERATION WAS NOT CARRIED OUT AS INSTRUCTED IN THE MM. FUSION WELDING WAS CARRIED OUT WITHOUT USING FILLER WIRE. ALL SUSPECT COMBUSTION LINERS HAVE BEEN IDENTIFIED AND ARE BEING INVESTIGATED. PN AFFECTED FW16870, FW16794, FW 27486.