As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE AIRCRAFT WAS ON A 72 MONTH CHECK WHICH REQUIRED INSPECTION OF THE WING BOX UPPER SURFACE. THE AME DISCOVERED THAT THE DRAIN LINE FOR THE L/H AND R/H WING UPPER FUEL (GRAVITY FEED) CAVITY SCUPPER WAS COMPLETELY ROTTED AWAY. THE AIRCRAFT HAS 646.2 TSN. DAMAGE DRAIN LINE WAS REMOVED AND REPLACED WITH A SERVICEABLE UNIT.