As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY CHECK, WASTE ACCESS DOOR BETWEEN FRAMES 88-89 STRINGER 24R-27R HAS CORROSION ON INTERNAL SIDE WHERE BONDING WIRE IS ATTACHED. REMOVED AND INSTALLED NEW WASTE ACCESS DOOR, BOND CHECK GOOD IAW AMM 53-03-60. MM HG4-736 DD 8-15-19.