TM 5-5420-209-12 Table 4-2. Unit Preventive Maintenance Checks and Services (PMCS) for the Ramp Bay cont. Item Location No. Interval Item to Item To Be Inspected Equipment Is Not Service/Check Procedure Ready/Available  If 21 Weekly Hydraulic Line Ensure line is properly secured at support link Line is not secured and  to  roadway  ponton. properly. Inspect for cuts, chaffing and leakage and Class II or Ill leak noted. damp serviceability. 22 Weekly Unfolding Ensure unfolding mechanism functions Broken welds noted or Mechanism properly. deformation prevents Inspect cover plate, spring pins, pins, lever, mechanism  from and  connecting  link  for  cracks,  broken  welds functioning  properly. and  deformation. 23 Weekly Bridge Latch Inspect  brackets,  shims  and  strike  catches  for Broken welds, binding or Receptacle cracks,  broken  welds,  binding  and deformation prevents deformation. engaging latch noted. 24 Weekly Skin  Surface Inspect  surface  area  for  punctures,  holes  and Any  damage  which dents exposing interior ribs. might allow water into bay interior (lf in doubt, perform soap bubble test). Inspect  seams  for  cracked/broken  welds. Cracked/broken   welds noted. 25 Weekly Tie Down Pin Inspect for cracks, broken welds and erosion Broken welds noted or of pin surface area. erosion of surface area prevents securing bay to transporter. 26 Weekly Skin Surface lnspect surface area for punctures, holes and Any  damage  which dents exposing interior ribs. might allow water into bay interior (If in doubt, perform soap bubble test). Inspect  seams  for  cracked/broken  welds. Cracked/broken   welds noted. 27 Weekly Tie Down Pin lnspect  for  cracks,  broken  welds  and  erosion Broken welds noted or of pin surface area. erosion of surface area prevents securing bay to transporter. 28 Weekly Bridge Latch Inspect brackets, shims and strike catches for Broken  welds,  binding  or Receptacle cracks,  broken  welds,  binding  and deformation prevents defomation. engaging latch noted. 29 Weekly Bridge  Latch Inspect brackets, supports and pins for cracks, Cracks,  broken  welds broken  welds  and  deformations. noted or deformation causes  binding. Inspect  springs  for  deformation  and  stretching. Springs  stretched. 4-15