What was found
LINTEL AT STGR 3LH AT THE FS 280 JOINT IS CRACKED THROUGH THE FIRST THREE FASTENER HOLES COMMON TO THE SKIN. C-CHECK RO 1/5/2021. REPAIRED THE STR 3L LINTEL CRACK, REF SB 670BA-53-040 AND REO 670-53-21-493 REV D DATED 2015-07-10. SEE CONTINUATION CARD FOR DETAILS. COMPLIED WITH 51-900-1002-SKY. COMPLETED FROM M-337, NO LEAKS NOTED. SERVICE BULLETIN 670BA-53-040, REVISION C, FUSELAGE-CENTER FUSELAGE, PRIMARY STRUCTURE FS 280.00 TO FS 295.00 INSPECTION OF LINTEL STRINGER 3 OF THE MAIN PASSENGER DOOR, PART A, INCOROPORATED. SERVICE BULLETIN 670BA-53-040, REVISION C, FUSELAGE-CENTER FUSELAGE, PRIMARY STRUCTURE FS 280.00 TO FS 295.00-INSPECTION AND REINFORCEMENT OF LINTEL STRINGER 3 OF THE MAIN PASSENGER DOOR, PART B, INCOROPORATED.