TM 1-1520-238-23 Change 3 B-165 (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 120804 FIRE EXTINGUISHER AIRCRAFT REPAIR 0.6 93, 376, 406, 416, 417, 435 120805 WIRE HARNESS W221 REPAIR 2.2 80, 129 376, 416, 441 120806 EXTINGUISHER INSPECT 0.3 93, 376, AIRCRAFT REMOVE 1.4 406, 416, INSTALL 1.4 417, 435 REPAIR 2.6 OVERHAUL 4.0 120807 TUBE ASSEMBLY REMOVE 0.3 376 R INSTALL 0.3 120808 TUBE ASSEMBLY REMOVE 0.3 376 R INSTALL 0.3 120809 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120810 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120811 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120812 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120813 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120814 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120815 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120816 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3 120817 TUBE ASSEMBLY, METAL REMOVE 0.3 376 R INSTALL 0.3