As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FS 740 RBL 70, TEE CAP AND FITTING AT LIGHTENING HOLE HAS BEEN GROUND ON, NOT TREATED OR PRIMED, AREA HAS CORROSION ON BOTH PARTS. REMOVED CORROSION REF SRM 51-10-1 PAGES 14-16, ROTO PEENED REF SOPM 20-10-03 PG 19. ALODINED AND PRIMED AREA REF EA IO 70053 PG 2. APPLIED ONE COAT LPS REF EA IO 70053 REV IR. CLASSIFIED AS A MAJOR REPAIR.