TM 10-3930-671 -10 Table 3-1.  Operator Preventive Maintenance Checks and Services - CONT. Location Item Item To Not Fully Mission No. Interval Check/ Procedure Capable If: Service DAILY- ENGINE- Continued Continued 13 During Engine Listen for unusual noise, misfiring, Engine is idling rough, or rough idling of engine.  Notify unit misfiring, or making maintenance, if necessary. unusual noise. WARNING The exhaust pipe and muffler are very hot.  Do not touch these parts with bare hands or allow body to come in contact with exhaust pipe or muffler.  Exhaust system parts can cause serious burns. 14 During Exhaust System Check exhaust system with engine Muffler or exhaust pipes running for signs of leaks.  Notify unit are leaking exhaust maintenance, if necessary. fumes. WARNING If NBC exposure is suspected, all air filter media should be handled by personnel wearing protective equip- ment.  Consult your unit NBC Officer or NBC NCO for appropriate handling or disposal procedures. 15 During Air Cleaner Check air cleaner restriction indicator.  If Yellow flag is in raised Restriction yellow flag is raised, air intake filter element position.  Air cleaner is Indicator requires servicing. missing. 3-7