Table 2-2. Operator/Crew Preventive Maintenance Checks and Services (Contd). ITEM NO. INTERVAL ITEM TO CHECK/ SERVICE PROCEDURE NOT FULLY MISSION CAPABLE IF: 2-44 Change 1 TM 9-2320-386-10 47 Weekly Deleted (Contd) 48 Air Start engine (para. 2-12) and check air Any hose lines are compressor compressor for loose bolts. Check for missing, leaking, or missing, leaking, or damaged hose lines. damaged. 49 Central a. Allow air pressure to build to tire normal operating pressure. inflation b. Increase to 1300 RPM and press system ON switch. c. Check air lines, hoses, and hubs for leaks. If leaking, notify unit maintenance. WARNING Hearing protection is required when maintaining vehicle with engine running.