2487 SB 49-7031 APU - INSPECT 3291238.2 SCV FOR THE UPPER BUTTERFLY SHAFT BUSHING. SERVICE BULLETIN MOS MSC SB 49-7365 APU - REPLACE IG1/4/ CLEVIC ASSY MD BOLT TO ELIMINATE CAPTIVE BOLT DESIGN. SERVICE BULLETIN MOS MSC SB 49-7366 APU - REPLACE IGV ASSEMBLY 3810821-4 WITH 3810821-5 TO ELIMINATE CAPTIVE B