TM 1-1520-238-23 B-88 Change 3 (1) (6) (5) (4) (3) (2) MAINTENANCE LEVEL GROUP NUMBER REMARKS CODE TOOLS & EQUIP REF CODE DEPOT (D) AVIM (F) AVUM (O) MAINTENANCE FUNCTION COMPONENT/ASSEMBLY 0701050601 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050602 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050701 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050702 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050703 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050704 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.7 137, 154, 376 R, AM 07010508 TUBE ASSEMBLY, METAL REMOVE 1.3 137, 154, R, AM DRAIN INSTALL 1.3 376 REPAIR 0.6 07010509 TUBE ASSEMBLY, METAL REPAIR 4.5 137, 154, 376 R, AM 0701051001 TUBE ASSEMBLY, METAL REPAIR 4.7 137, 154, 376 R, AM 0701051002 TUBE ASSEMBLY, METAL REPAIR 4.5 137, 154, 376 R, AM 0701051003 TUBE ASSEMBLY, METAL REPAIR 4.5 137, 154, 376 R, AM 0701051101 TUBE ASSEMBLY, METAL REPAIR 4.7 137, 154, 376 R, AM 0701051102 TUBE ASSEMBLY, METAL REPAIR 4.5 137, 154, 376 R, AM 0701051103 TUBE ASSEMBLY, METAL REPAIR 4.5 137, 154, 376 R, AM