What was found
CHANNEL ASSY OF FWD DRAIN MAST CORRODED. REMOVED THE DAMAGE FROM CHANNEL ASSY OF FWD DRAIN MAST, & EVALUATED AS OUT-OF-LIMITS. REPLACED CHANNEL WITH SERVICEABLE CHANNEL IAW DWG 601R43210, REV D, SRM 51-42-06-00 & SRM 51-42-10, REV 39. COMPLIED WITH TASK CARD 51-900-1003-SKY. PRESSURE LEAK CHKD GOOD. NO LEAKS DETECTED.