TM 55-1560-307-13&P Section V.  PREPARATION FOR STORAGE OR SHIPMENT 3-24. SCOPE.  This section contains information and references   of   information   pertaining   to   preservation, storage, and shipping. 3-25. PRESERVATION.  The tank can be purged and preserved as follows: WARNING · Ground    aircraft    and    all    equipment used in performing this operation. Use appropriate   clothing   and   gloves   and goggles. · Drain  fuel  tank.    Do  not  allow  tank  to remain   empty   overnight   after   fuel   is drained. a. Electrical  Harnesses,  Tiedown  Straps,  and  Vent Lines. (1) Remove  electrical  wire  harness  and  store inside storage container provided for system components. (2) Remove   tiedown   straps   and   roll   up,   and store inside storage container. (3) Remove vent lines from tanks and store. b. Fuel Management Control Panel.  (FMCP). (1) Remove FMCP from 600 gallon tank. (2) Empty residual fuel from FMCP by opening both  pump  inlet  and  outlet  manifold  lines.    Remove  as much fuel as possible. (3) Install pump inlet and outlet dust covers. (4) Wipe  up  any  fuel  that  may  have  spilled  on or inside the FMCP and secure. (5) Install FMCP inside storage container using quick release pins. c. Fuel Manifold Transfer Lines. (1) Remove all fuel manifold transfer lines from aircraft. (2) Open and drain residual fuel from each line, tee,  and  elbow  fittings  into  an  approved  fuel  storage container. This is done to prevent over expansion of fuel lines due to normal heating/ cooling which will result in damage to hoses during storage. (3) Place   dust   caps   on   each   line,   tee,   and elbow   after   draining   residual   fuel,   and   store   inside storage container. d. 600 Gallon Tank. (1) Defuel  tank  into  aircraft's  main  tank  or  into defueling truck as required.  Refer to paragraph 3-14. (2) Remove residual fuel in tank. (3) Pour approximately 5 gallons of lubricating oil (item  12,  Appx  D)  to  help  reduce  the  flash  point  of  the empty fuel tank. (4) Flush the bottom of tank thoroughly with the oil. (5) Close dump valve on tank after it is drained, and fill with lubricating oil (item 12, Appx D).  Allow oil to remain in fuel cell for 24 hours. (6) Drain lubricating oil and let tank stand for 2 to   3   hours,   and   then   test   with   a   combustible   gas indicator   for   presence   of   fuel   vapors.      If   an   unsafe condition  exists,  reflush  tank  with  fresh  oil  until  a  safe reading is obtained. 3-36