TM  55-8115-200-23&P CHAPTER 3 DIRECT  SUPPORT  MAINTENANCE  INSTRUCTIONS Section I. REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT 3-1.  Special  Tools  and  Equipment.  No special Appendix C of this manual. tools or equipment are required. 3-3. Fabricated Tools and Equipment.  No fab 3-2.  Repair   Parts.   Repair  parts  are  listed  in cated  tools  or  equipment  are  required. Section  II.  GENERAL  MAINTENANCE 3-4. General. This  section  contains  general  mainte- nance  instructions  to  be  used  in  performing  direct support  maintenance  on  the  container. 3-5.  Maintenance. a. Cleaning. All parts should be cleaned in accor- dance with instructions contained in TM 9-214. b.  Inspection.   The   importance   of   carefully inspecting  disassembled  parts  cannot  be  over-empha- sized since reassembly of substandard or defective parts  can  result  in  needless  troubleshooting  and rework.   Structural   surface   dimensions   and   bore diameters are to be inspected after cleaning. Areas to be inspected for dimensions and tolerances shall be free of surface treatment or painting at the time of inspection.  Inspection  procedures  must  be  performed by experienced personnel using good shop practices. Good shop practice includes the compilation of com- plete and accurate inspection records as specified in DA  Pam  738-750.  Such  records  not  only  expedite reworking  of  the  equipment  but  ensure  a  complete  and thorough overhaul. Inspection records should be based upon the requirements outlined in this paragraph. Parts requiring repair or replacement should be so tagged and a notation of the disposition of these parts should  be  entered  in  the  inspection  records.  All micrometers,  gages,  indicators,  and  other  measuring and testing equipment must be checked periodically and, when required, accurately calibrated in accor- dance with MIL-STD 120 or in accordance with the recommendations  of  the  equipment  manufacturer. NOTE Parts marked serviceable at inspec- tion   should   be   treated   with   an approved  preservative  if  they  are not to be reassembled immediately. NOTE Surface rust and minor paint deteri- oration,  with  rust  showing  through is acceptable. (1)  Metallic  parts.  The  below  listed  proc dures are standard procedures that should be followed when  inspecting  metallic  parts. (a)  Ferrous  parts.  All  ferrous  parts should be inspected for cracks by performing a mag- netic  particle  test  as  specified  in  Specification  MIL-I- 2513C. (b) Non-ferrous parts. All non-ferrous parts should be inspected for cracks by performing a penetrant test as specified in Specification MIL-I- 2513C. (c) Radiographic inspection. Welds shall be radiographically examined in accordance with Specification MIL-R-11468, Standard I, for 100 per- cent of the weld length. (d) Magnetic particle inspec- tion. Cracks or crack type defects are not permitted. Magnetic particle inspection shall be performed in accordance  with  Specification  MIL-I-6868. (e) Rust. Inspect all ferrous parts for rust and  rework  as  necessary. (f) parts with external threads. Inspect these  parts  for  damaged  threads.  If  threads  are  dam- aged the part must be replaced. (g) Threaded holes. Visually  inspect  all threaded holes for threads and obstructions which may be wedged at the bottom of the hole. (h) Sheet metal parts.  Inspect  all  sheet metal  parts  for  bent  corners,  distortion,  cracks,  tears, broken corners, and defective welds. (2)  Hardware.  Discard  all  cotter  pins  and lockwashers during disassembly. Visually inspect all nuts, bolts, and screws for damaged threads and heads that could prevent proper wrenching. Replace all dam- aged  hardware. Change 4  ^3-1