As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A ROUTINE INSPECTION, THE NR 2 AND NR 3 ENGINES P4 DRAIN LINES WERE FOUND CRACKED. SUBMITTER STATED THAT POSSIBLY THE CRACKS WERE CAUSED BY WATER ACCUMULATION AFTER ENGINE WATER WASHES. THE MAINTENANCE PROGRAMS HAVE BEEN MODIFIED TO CALL FOR A GROUND RUN WITH BLEED AIR ON AFTER A WATER WASH.