As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT AFT LAV MOUNT INTERCOSTAL IS CORRODED FOUND WHILE WORKING 947 FRAME CORROSION. GROUNDED - YES. LOCATED AND DRILLED NEW INTERCOASTAL IAW BOEING 737-900ER SRM 51-40-05-0G-0. REMOVAL ANED INSTALL MAINTENANCE PERFORMED ON AAR MIG-5 OK456722 W/O 1023835 2000 0171W- .500" O- .090 R- .000 L- .650" D- .090.