As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AC WAS IN FOR HVY CK FOUND CORROSION ON FWD ANGLE FOR DRAIN MAST BTWN FR 86-87 AND BTWN STR 27-28RH. AAR MX REPLACED FWD ANGLE PN 170-87561-001 FOR DRAIN MAST BTWN FR 86-87 AND BTWN STR 27-28 RH. FOR DETAILS OF WORK PERFORMED SEE AAR NRC# 45000474-1000-0020.