TM 1-1520-238-23 Change 3 B-19 (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 020503 STRUCTURAL INSTALLATION REPAIR 0.4 376 020504 STRUCTURAL ASSEMBLY REMOVE 0.2 376 INSTALL 0.2 REPAIR 0.7 020505 STEPS INSTALLATION ASSEMBLY REPAIR 0.2 376 020506 STEP, FOOT SERVICE 0.5 376 REMOVE 0.2 INSTALL 0.2 REPAIR 0.9 020507 FLOOR INSTALLATION ASSEMBLY REPAIR 0.4 0.4 377 020508 SUPPORT INSTALLATION ASSEMBLY REPAIR 0.3 377 020509 SUPPORT ASSEMBLY REMOVE 0.4 377 INSTALL 0.4 REPAIR 0.8 020510 SUPPORT, STRUCTURAL REMOVE 0.6 377 INSTALL 0.6 REPAIR 0.8 020511 BAFFLE ASSEMBLY REMOVE 0.3 376 INSTALL 0.3 REPAIR 0.7 020512 SUPPORT INSTALLATION, NACELLE REPAIR 0.2 377 020513 FLOOR INSTALLATION INSPECT 0.4 377 ASSEMBLY REPAIR 0.2 020514 COVER, ACCESS INSPECT 0.1 377 REMOVE 0.1 INSTALL 0.1 REPAIR 0.5