TM 55-2210-224-12 Table 2-1.  Operator/Crew Preventive Maintenance Checks and Services (continued) B - Before D - During A - After INTERVAL Item Item To Be Procedures Equipment Is No. Inspected Check for and have repaired, Not Ready/ B    D A filled or adjusted as needed. Available If: 13 • Seats and a.  Inspect seats and mounts for Seat mount is Cushions obvious damage. unsecure or damaged. b.  Inspect cushion for rips and damage. 14 • • Engine Oil Check oil level.  Add oil in Level accordance with LO 55-2210-224-12. Dipstick 15 • Battery Check for broken, loose, or frayed Belts are Charging alternator belts. broken, loose, Alternator or frayed. Belts 16 • Air Com- Check oil level.  Add oil in pressor Oil accordance with L0 55-2210-224-12. Level Dipstick 17 • Air Check for broken, loose, or frayed Belts are Compressor belts. broken, loose, Belts or frayed. 18 • Fire Check for broken seal.  Check Seal is broken Extinguishers gage for improper indication. or gage indica- tion is improper. 19 • Air Cleaner Check to see that the green scale Red scale is Indicator is visible. visible. 20 • • Instrument a.  Inspect instrument gages and Gages and indicators for cracked or broken Indicators glass and security of mounting. • b.  Start the engine and observe One or more instrument gages and indicators to instruments are check that indications during inoperative or operation are normal as indicated giving faulty below: indications. Engine oil pressure: Normal - hot at 40-70 psi 2100 rpm (276-483 kPa) 2-21