TM 1-1520-238-23 Change 3 B-167 (1) (2) (3) (4) (5) (6) MAINTENANCE LEVEL TOOLS & EQUIP GROUP NUMBER COMPONENT/ASSEMBLY MAINTENANCE FUNCTION AVUM (O) AVIM (F) DEPOT (D) REF CODE REMARKS CODE 13 ENVIRONMENTAL CONTROL SYSTEM REPAIR 0.5 376 1301 ENVIRONMENTAL CONTROL UNIT INSTALLATION REPAIR 0.1 27, 129, 154, 158, 163, 262, 334, 376, 378, 418, 434, 435 130101 DUCT ASSEMBLY, AIR REMOVE 0.3 27, 154, COOLING INSTALL 0.3 262, 376 REPAIR 1.1 130102 ACCESS INSPECT 0.2 27, 129, SERVICE 0.7 154, 376, REMOVE 0.4 418 INSTALL 0.4 OVERHAUL 5.2 130103 DUCT ASSEMBLY, REMOVE 1.8 27, 129, TEMPERATURE INSTALL 1.8 154, 376, REPAIR 1.2 435 130104 CONTROL, INSPECT 0.2 376 TEMPERATURE REMOVE 0.3 INSTALL 0.3 OVERHAUL 2.9 1302 DUCT ASSEMBLY, AIR REMOVE 0.3 27, 154, COOLING INSTALL 0.3 262, 376 REPAIR 0.6 1303 SUPPORT ASSEMBLY, REMOVE 1.7 27, 154, ENVIRONMENTAL INSTALL 1.7 215, 262, 376, 378, REPAIR 0.2 , , 435 1304 DUCT ASSEMBLY, AIR REMOVE 0.7 376 COOLING INSTALL 0.7 REPAIR 1.0 1305 DUCT ASSEMBLY REMOVE 1.2 376 INSTALL 1.2 REPAIR 1.4