'a' for a2-a5 engine to a2-a5 gear case, standard rotation
NSN 5990-00-079-5406
NSN 5920-01-354-1598
NSN 5999-01-587-4895
NSN 5930-00-177-2319
NSN 5835-00-155-1379
NSN 5950-00-231-3403
NSN 5960-00-806-9631
NSN 6685-01-462-0141
NSN 6220-00-732-2026
NSN 5965-00-469-5009
NSN 6220-00-308-3487
NSN 5999-00-225-4899