Back Table 1. Preventive Maintenance Checks and Services (PMCS) - Continued | Up TM-10-1670-293-23P Parachute Personnel Type: 35-Foot Diameter T-10C Troop Back Parachute Assembly NSN 1670-01-248-9502 Manual | Next UNIT MAINTENANCE T-10C/T-10D TROOP BACK PARACHUTE ASSEMBLY SHAKEOUT AND AIRING |