What was found
DURING A HFEC INSPECTION OF THE Y RING ATTACHMENT OF THE AFT PRESSURE BULKHEAD A CRACK WAS INDICATED AT A FASTENER HOLE LOCATED AT STRINGER 10R B STATION 1582 INTERIOR OF THE FUSELAGE. TIMED OUT VERIFIED CRACK & REPAIRED IAW REA B653-60742-MR, TRIM OUT MEASURED 1.5 X 4.2 WITH 2.5 RADIUS. OPEN HOLE HFEC & SURFACE HPEC CHECKS PERFORMED WITH NO OTHER DAMAGE NOTED. REINSTALLED ALL FASTENERS REMOVED FOR ENGINEERING IAW B767 SRM 51-40-02. CRACKED LENGTH APPROXIMATELY .625 PN 148T2610-156 SN NSN PART NAME AFT PRESSURE BULKHEAD EXACT FS & BX LOCATION ON A/C FROM 1582 TO 1582 EXACT STRINGER & WS LOCATION ON A/C FROM STRINGER 10R TO STRINGER 10R. AIRCRAFT WAS GROUNDED.