TM 1-1520-238-23 Change 3 B-87 (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 0701050206 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.6 137, 154, 376 R, AM 0701050207 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050208 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050209 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 07010503 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 5.0 137, 154, 376 R, AM 0701050401 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.7 137, 154, 376 R, AM 0701050402 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.7 137, 154, 376 R, AM 0701050403 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.6 137, 154, 376 R, AM 0701050404 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.6 137, 154, 376 R, AM 0701050405 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.6 137, 154, 376 R, AM 0701050406 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.6 137, 154, 376 R, AM 0701050407 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.6 137, 154, 376 R, AM 0701050408 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.5 137, 154, 376 R, AM 0701050409 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 4.6 137, 154, 376 R, AM 0701050410 TUBE ASSEMBLY, METAL REPAIR 4.5 137, 154, 376 R, AM 07010505 TUBE ASSEMBLY, PRIMARY SYSTEM REPAIR 5.0 137, 154, 376 R, AM