What was found
WHILE IN HEAVY CHECK, SURFACE OXIDIATION ALONG LOWER FLANGE ON AFT BELLY PANEL, MAINTENANCE R & R LOWER FLANGE IAW AMM 53-04-50.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE IN HEAVY CHECK, SURFACE OXIDIATION ALONG LOWER FLANGE ON AFT BELLY PANEL, MAINTENANCE R & R LOWER FLANGE IAW AMM 53-04-50.