TM 10-6640-215-13 Table 2-1.  Operator Preventive Maintenance Checks and Services Item Interval Item To Check Procedure Not Fully Mission No. Service Capable If: 81 Weekly Propane Locker Inspect for loose or missing bolts. Missing bolts. 82 Weekly Fume Chamber a.  Inspect for condition and se- Defective door, or mis- curity. sing screws. b.  Check light operation. Light does not come on. 83 Weekly Gum Content a.  Inspect for exterior damage. Missing fasteners or bro- Test Bath ken switches. b.  Check for leaks. Class III leak. c.  Check light Light does not come on. 84 Weekly Electric Steam a.  Inspect for leakage. Missing fasteners.  Class Boiler III leaks. b.  Check level. Boiler not level. 85 Weekly Gum Bath/Fume Check operation. Inoperative exhaust blow- Hood Exhaust er. Vent and Blowers 86 Weekly Distillation Test Inspect for security. Missing screws. Apparatus 87 Weekly Oxidation Bath Inspect for security. Missing screws. 88 Weekly Gas Cylinders Inspect cylinders for leaks. Gas supply is low or cyl- inder leaking. 89 Weekly Laboratory Inspect for security. Missing screws. Ovens 90 Weekly Burn-Out Inspect for security. Missing screws. Furnace 91 Weekly Cloud and Pour Inspect condition. Apparatus incomplete or Point Apparatus inoperative. 92 Weekly Support Items a.  Inspect fire extinguishers. Broken seal or low charge indication. b.  Inventory first aid kit. Low supplies. 93 Monthly Utility Box a.  Inspect direction valve lever Damaged handle or mis- for condition and security. sing screw.  Damaged la- bel. b.  Inspect gasket for condition Defective gasket. and security. 2-40