As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT WASTE WATER DRAIN MAST MIDDLE ATTACH FASTNER HOLE HAS LIGHT SURFACE CORR ON INTERNAL SIDE. REF AD 20122314-400-53 STE4P 14 CORR WAS FOUND CONTACT ENG TO OBTAIN AMOC REPAIR. GROUNDED - YES. REMOVED AND REPLACED AFT WASTE WATER DRAIN MAST MIDDLE SUPPORT CHANNEL IAW AD20122314, 400-53-103 R, W .25 O .040 R .037 L 1.0 D .003.