TM 10-6640-238-13 2-35 Table 2-14.  Operator Preventive Maintenance Checks and Services (PMCS) - CONT NOTE If  equipment  must  be  kept  in  continuous  operation,  only  do  procedures  that  can  be performed without disturbing operation.  Make the complete checks and services when equipment can be shut down. BE - Before    AF – After MO - Monthly DU- During   WE – Weekly Interval Item No. B E D U A F W E M O Item to Inspect Procedures Not Fully Mission Capable If: 5         Environmental Control Units (ECUs) Inspect bellows. Bellows damaged. Mounts loose or missing. ECUs do not operate. Retaining cable damaged or missing. 6 a.   Inspect access door. Latches, keepers, seals, ball studs, or hinges damaged or missing. b.   Inspect door microswitches. Microswitches do not activate properly when door is closed and deactivate when door is opened. c.   Inspect gasket. Defective gasket. d.   Inspect motor operation. Motor does not operate.         Purge Exhaust Doors e.   Inspect filters. Clogged, dirty, or defective filter. 7 a.   Inspect access doors. Latches, keepers, seals, ball studs, or hinges damaged or missing. b.   Inspect door microswitches. Microswitches do not activate properly when door is closed and deactivate when door is opened. c.   Inspect gasket. Defective gasket. Purge Intake Doors d.   Inspect motor for operation. Motor does not operate e.   Inspect filters. Clogged, dirty, or defective filter.