What was found
AREA BEHIND FWD LOWER CARGO AT FUSELAGE STATION 742 STRINGER 38L - STRINGER 39L SHEAR TIE CORRODED. INSTALLED SHEER TIE IN FWD LOWER CARGO AT STATION 742 BETWEEN 538L & 539L IAW B767 SRM 51-40-02. LEVEL 2 CORRODED, LOC FROM 742, LOC FROM 538L TO 539L, PN 140T21020253, PN SHEAR TIE, SN NSN. AIRCRAFT WAS GROUNDED.