TM 55-1510-222-10 Table 2-11.  Standard, Alternate, and Emergency Fuels EMERGENCY FUEL ENGINE ARMY STANDARD FUEL ALTERNATE TYPE TYPE ‘ MAX.HOURS PT6A MIL-T-5624 MIL-T-5624 MIL-G-5572 150 Grade JP-4 Grade JP-5 Any AV Gas MIL-T-83 Grade JP-8 * Maximum operating hours with indicated fuel between engine overhauls (TBC)). CAUTION When   conditions   permit,   the   aircraft shall  be  positioned  so  that  the  wind will carry the fuel vapors away from all possible    sources    of    ignition.        The fueling  vehicle  shall  be  positioned  to maintain   a   minimum   distance   of   10 feet from any part of the aircraft, while maintaining a minimum distance of 20 feet  between  the  fueling  vehicle  and the fuel filler point. a. Shut off unnecessary electrical equipment in the  aircraft,  including  radar  and  radar  equipment.  The master  switch  may  be  left  on,  to  monitor  fuel  quantity gages,   but   shall   not   be   moved   during   the   fueling operation.  Do not allow operation of any electrical tools, such  as  drills  or  buffers,  in  or  near  the  aircraft  during fueling. b. Keep  fuel  servicing  nozzles  free  of  snow, water, and mud at all times. c. Carefully remove snow, water, and ice from the aircraft fuel filler cap area before removing the filler cap (fig.  2-32).  Remove only one aircraft tank filler cap at any one time, and replace each one immediately after the servicing operation is completed. d. Wipe  all  frost  from  fuel  filler  necks  before servicing the aircraft. e. Drain water from fuel tanks, filter cases, and pumps  prior  to  first  flight  of  the  day.    Preheat,  when required, to ensure free fuel drainage. f. Avoid  dragging  the  fueling  hose  where  it can damage the soft, flexible surface of the deice boots. g. Observe NO SMOKING precautions. h. Prior to transferring the fuel, ensure that the hose is grounded to the aircraft. i. Wash off spilled fuel immediately. j. Handle  the  fuel  hose  and  nozzle  cautiously to avoid damaging the wing skin. k. Do not conduct fueling operations within 100 feet of energized airborne radar equipment or within 300 feet of energized ground radar equipment installations. I. Wear  only  nonsparking  shoes  near  aircraft or   fueling   equipment,   as   shoes   with   nailed   soles   or metal heel plates can be a source of sparks. WARNING Prior  to  removing  the  fuel  tank  filler cap,   the   hose   nozzle   static   ground wire shall be attached to the grounding sockets located adjacent to the filler opening. 2-90.  FILLING FUEL TANKS. Fill tanks as follows: a. Attach bonding cables to aircraft. b. Attach  bonding  cable  from  hose  nozzle  to ground socket adjacent to fuel tank being filled. CAIJTION Do  not  insert  fuel  nozzle  completely into  fuel  cell  due  to  possible  damage to  bottom  of  fuel  cell.    Nozzle  should be    supported    and    inserted    straight down  to  prevent  damage  to  the  anti- siphon valve. c. Remove  fuel  tank:  filler  cap  and  fill  main tank 2-84