TM 1-1520-238-23 B-42 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 021711 BEARING UNIT, PLAIN INSPECT 0.2 19, 27, REMOVE 2.4 107, 154, INSTALL 2.4 199, 262, 372, 376, REPAIR 0.5 0.9 , , 438 0218 GLARESHIELD INSTALLATION INSPECT 0.1 376 021801 GLARESHIELD ASSEMBLY INSPECT 0.2 376, 378 REMOVE 1.0 INSTALL 1.0 REPAIR 0.8 021802 COVER REMOVE 0.2 376 INSTALL 0.2 REPAIR 0.8 021803 GLARESHIELD ASSEMBLY, INSPECT 0.2 376, 378 RH REMOVE 0.5 INSTALL 0.5 REPAIR 0.9 021804 EXTENSION ASSEMBLY, INSPECT 0.1 27, 154, LH REMOVE 0.1 262, 376 INSTALL 0.1 REPAIR 0.2 021805 EXTENSION ASSEMBLY, INSPECT 0.1 27, 154, RH REMOVE 0.1 262, 376 INSTALL 0.1 REPAIR 0.2 021806 CURTAIN INSTALLATION INSPECT 0.1 376 A, I, N REPAIR 0.2 021807 CURTAIN INSTALLATION INSPECT 0.1 376 A, I, N REPAIR 0.2 021808 CURTAIN TRAY ASSEMBLY INSPECT 0.1 376 A, I, N REMOVE 0.2 INSTALL 0.2 REPAIR 0.4