TM 1-1520-238-23 B-28 Change 3 (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 021306 TRAILING EDGE REMOVE 0.5 376 INSTALLATION INSTALL 0.5 REPAIR 0.1 021307 TRAILING EDGE, WING INSPECT 0.1 376 REMOVE 1.0 INSTALL 1.0 REPAIR 0.2 021308 RIB ASSEMBLY INSPECT 0.1 377 REPAIR 0.3 021309 COVER ASSEMBLY, RH INSPECT 0.1 376 REMOVE 0.1 INSTALL 0.1 REPAIR 0.4 021310 COVER, ACCESS INSPECT 0.1 377 REMOVE 0.1 INSTALL 0.1 REPAIR 0.2 021311 FAIRING INSTALLATION INSPECT 0.1 376 ASSEMBLY REPAIR 1.2 021312 FAIRING ASSEMBLY INSPECT 0.1 376 REMOVE 0.2 INSTALL 0.2 REPAIR 0.8 021313 FAIRING INSTALLATION INSPECT 0.1 376 ASSEMBLY REPAIR 1.2 021314 FAIRING ASSEMBLY INSPECT 0.1 376 REMOVE 0.2 INSTALL 0.2 REPAIR 0.9 0214 NACELLE INSTALLATION REPAIR 0.2 376