E - WASHERS TO PC FUEL TUBE/MANIFOLD. SERVICE BULLETIN COMPUED WITH - AT MANUFACTURE MOS 16-DEC-1998 FIRS/MSC - 0 ENC 0 SB 72-0121 R1 NO. 1 ENGINE - CORE ASSEMBLY HARDWARE CHANGE. SERVICE BULLETIN NOT APPLICABLE MOS HRSAISC - ENC 7-Insufficient Information +-Task exists in Inspection Manual (s)-Suppressed R