TM 1-1520-238-23 Change 3 B-93 (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 07020703 TUBE ASSEMBLY, METAL REPAIR 4.6 27, 129, 154, 384, 393 R, AM 07020704 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070501 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070502 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070503 TUBE ASSEMBLY, METAL REPAIR 4.7 27, 129, 154, 384, 393 R, AM 0702070504 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070505 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070506 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070507 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070508 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070509 TUBE ASSEMBLY, METAL REPAIR 4.5 27, 129, 154, 384, 393 R, AM 0702070601 TUBE ASSEMBLY, METAL REPAIR 4.7 27, 129, 154, 384, 393 R, AM