TM 5-5420-209-12 Table 2-12. Operator Preventive Maintenance Checks and Services (PMCS) for the Interior Bay cont. Location ltem No. Interval Item to Item To be Inspected Equipment Is Not Service/Check Procedure Ready/Available lf 50 Before Bilge Plugs Ensure plugs are secured with wire rope to ponton. Any  plug  missing. Inspect rubber seal for cuts, elasticity and dry rot. Check handle operation. NOTE Receptacle  consists  of  entire housing  (Block)  in  which connector  is  seated. 51 Before Connector Receptacles Inspect for cracks, broken welds, elongation and deformation. NOTE Cracks  or  broken  welds noted.  Elongation  or deformation prevents proper seating of connector. Proper connector has a narrow center bar (0.500 inch);  older  connectors  have thicker (.69 in) center bar. Loose or missing set screws will allow water into bay cavity. 52 Before Roadway Connectors Ensure  connector  is  correct  type. Incorrect  connector  type. Inspect  connector,  eye  bracket,  set  screws, spring and spring pins for cracks and Any  defect  which prevents proper seating deformation. of  connector. 53 Before Roadway surface Inspect for ruptured seams, holes punctures and  cracked  welds. Any defect allowing water into bay cavities. 54 Before Roadway Surface (Curbside Roadway Inspect for ruptured seams, holes punctures and  cracked  welds. Any defect allowing water into bay cavities. Ponton) 5 5 Before Roadway Connectors Ensure  connector  is  correct  type. Inspect  connector,  eye  bracket,  set  screws, spring and spring pins for cracks and deformation. Incorrect  connector  type. Any  defect  which prevents  proper  seating of connector. 56 Before Connector Receptacles Inspect for cracks, broken welds, elongation Cracks  or  broken  welds and  deformation. noted.  Elongation  or deformation prevents proper seating of connector. 2-40 Change  1