What was found
SJO - DURING C-CHECK, LOWER EXTERIOR FUSELAGE SKIN BULGED (CORRODED) FROM BS 727 TO 780, STRINGER 20L. REPAIRED FUSELAGE FRAME SECTION IAW SRM 53-30-3 FIG 15. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
SJO - DURING C-CHECK, LOWER EXTERIOR FUSELAGE SKIN BULGED (CORRODED) FROM BS 727 TO 780, STRINGER 20L. REPAIRED FUSELAGE FRAME SECTION IAW SRM 53-30-3 FIG 15. (M)