TM 10-4520-261-12&P SPACE HEATER ARCTIC (SHA) PREVENTIVE MAINTENANCE CHECK AND SERVICES (PMCS)   0010 00 0010 00-9 THIS SECTION COVERS: After Operation PMCS Checks and Services INITIAL SETUP: SHA Shutdown and Cool   Maintenance Level Materials Operator Wiping Rags (WP0046, Table 1, Item 1) Table 1. Preventive Maintenance Checks and Services for SHA - continued ITEM NO. INTERVAL ITEM TO BE CHECKED OR SERVICED PROCEDURE EQUIPMENT NOT READY/ AVAILABLE IF: WHEN USING EITHER LIQUID OR SOLID FUEL. . . 17 After Stack cap and nested stack assemblies Check inside of stack sections (1) and stack cap (2) for thick deposits of carbon/soot, and clean if necessary.   Check for cracked sections or bent flanges which may cause the leakage of exhaust gases into heated space during operation. Stack or stack cap assembly have an amount of soot or carbon buildup which would impair operation or cause a fire inside the stack and stack cap during operation. 18 After Tent lines and wire ropes   Check for frayed or cut tent lines (3) and wire ropes (4). Tent lines or wire ropes frayed or cut. 19 After Heater body assembly Clean ash deposits from heater body assembly (5) if unit was recently used in solid fuel mode.  Check that door (6) and lid assemblies (7) open and shut properly, and that stack adaptor assembly (8) is not bent. Door and lid assemblies do not open, or do not shut fully; stack adaptor assembly will not accommodate stack assembly. 20 After Burner cover assembly Check that burner cover assembly (9) is not bent, and that it does not have holes in it. Burner cover assembly bent or has holes in it which would prevent it from sealing off air leaks in liquid or solid fuel operation.