Table  4-3.  Unit  Preventive  Maintenance  Checks  and  Services  (PMCS)  for  the  interior  Bay  cont. 29 30 31 32 33 34 35 36 37 38 Interval Weekly Weekly Weekly Weekly Weekly Weekly Monthly Monthly Monthly Monthly Location Item to Service/Check Bridge  Latch Travel Latch Travel Latch Receptacle Bridge  Latch Skin  Surface Foldlock  Latch Hinges  and Pins Support  Links Lifting  Eye Cable  Guide Item To Be Inspected Procedure Inspect brackets, supports and pins for cracks, broken welds and deformation. Inspect  springs  for  deformation  and  stretching. Inspect brackets, supports and pins for cracks, broken welds and deformation. Inspect  springs  for  deformation  and  stretching. Inspect brackets, shims and strike catches or cracks, broken welds, binding and deformation. Inspect brackets, supports and pins for cracks, broken welds and deformation. Inspect  springs  for  deformation  and  stretching. Inspect surface area for punctures, holes and dents  exposing  interior  ribs. Inspect  seams  for  cracked/broken  welds. Inspect brackets, supports and pins for cracks, broken welds and deformation. Inspect  springs  for  deformation  and  stretching. Inspect bow to roadway ponton hinge brackets and pins for cracks and elongation. Inspect for broken welds, cracks and deformation. Inspect for cracks and elongation of eye. Inspect  for  cracks,  gouges,  jagged  protrusions, erosion  or  surface  area  and  elongation  of  eye. Equipment Is Not Ready/Available If Cracks,  broken  welds noted or deformation causes  binding. Springs  stretched. Cracks,  broken  welds noted or deformation causes  binding. Springs  stretched. Broken welds, binding or deformation  prevents engaging latch noted. Cracks,  broken  welds noted or deformation causes  binding. Springs   stretched. Any damage which allow water  into  bay  interior  (If in doubt, perform soap bubble  test). Cracked/broken   welds noted. Cracks,  broken  welds noted  or  deformation causes  binding. Springs   stretched. Any hinge cracked or elongation  allows  pin  to move  freely. Broken welds noted. Any cracks noted or eye elongation  equals  25% of  original circumference. Eye  cracked,  elongated more than 0.50 at upper arc  or  aluminum  eroded to  within  .050. TM  5-5420-209-12 Item No. 4-22