TM 1-1520-238-23 Change 3 B-31 (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 021503 SUPPORT ASSEMBLY REPAIR 0.7 376 021504 DOOR, ACCESS INSPECT 0.1 377 REMOVE 0.1 INSTALL 0.1 REPAIR 0.5 021505 DOOR INSTALLATION INSPECT 0.1 376 REPAIR 0.3 021506 DOOR ASSEMBLY, WATER INSPECT 0.1 377 A, D, I, J, REMOVE 0.1 U INSTALL 0.1 REPAIR 0.5 021507 DOOR INSTALLATION INSPECT 0.1 376 ENGINE ACCESS REPAIR 0.3 021508 VENT ASSEMBLY INSPECT 0.1 27, 154, REMOVE 0.3 262, 376 INSTALL 0.3 REPAIR 0.4 021509 VENT ASSEMBLY INSPECT 0.1 27, 154, REMOVE 0.3 262, 376 INSTALL 0.3 REPAIR 0.4 021510 DOOR ASSEMBLY INSPECT 0.1 27, 154, REMOVE 0.4 262, 376 INSTALL 0.4 REPAIR 0.7 021511 DOOR, ACCESS REMOVE 0.2 377 INSTALL 0.2 REPAIR 0.6 021512 DOOR INSTALLATION INSPECT 0.1 376 ASSEMBLY REPAIR 0.2 021513 DOOR ASSEMBLY INSPECT 0.1 27, 154, REMOVE 0.2 262, 376 INSTALL 0.2 REPAIR 0.6