TM 1-1520-238-23 Change 3 B-169 (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 1317 DUCT ASSEMBLY, AIR REMOVE 0.8 27, 154, COOLING INSTALL 0.8 199, 262, REPAIR 1.4 376 1318 DUCT ASSEMBLY, AIR REMOVE 0.7 27, 154, COOLING INSTALL 0.7 199, 262, REPAIR 4.9 376 1319 DUCT ASSEMBLY, AIR REMOVE 0.3 27, 154, COOLING INSTALL 0.3 199, 262, REPAIR 1.4 376 1320 HOSE, AIR DUCT REMOVE 0.9 27, 154, INSTALL 0.9 199, 262, REPAIR 3.2 376 1321 DUCT ASSEMBLY, AIR REMOVE 1.1 27, 154, COOLING INSTALL 1.1 199, 262, REPAIR 2.5 376 1322 DUCT ASSEMBLY, AIR REMOVE 1.9 27, 154, COOLING INSTALL 1.9 199, 262, REPAIR 4.0 376 1323 DUCT ASSEMBLY, REMOVE 1.3 27, 154, ENVIRONMENTAL INSTALL 1.3 199, 262, REPAIR 2.3 376 1324 DUCT ASSEMBLY, AIR REMOVE 0.6 27, 154, COOLING INSTALL 0.6 199, 262, REPAIR 1.3 376 1325 DUCT ASSEMBLY, AIR REMOVE 0.8 27, 154, COOLING INSTALL 0.8 199, 262, REPAIR 3.5 376 1326 DUCT ASSEMBLY, AIR REMOVE 0.6 27, 154, COOLING INSTALL 0.6 199, 262, REPAIR 2.7 376 1327 DUCT ASSEMBLY, AIR REMOVE 0.6 27, 154, COOLING INSTALL 0.6 199, 262, REPAIR 2.0 376