TM 1-1510-224-10 (ZU).        Press    the    MODE     button     to     advance     the annunciator to  ZU  and  set  time  as  for  local  time  shown above.    Minutes  and  seconds  do  not  need  to  be  reset  if local   time   is   correctly   set.      Press   the   RST   button   to display  minutes/  seconds,  then  press  again  to  activate the complete display. When    changing    time    zones,    the    hour    may    be changed  as  above.    It  is  not  necessary  to  change  the minutes/seconds.  Press the  RST  button  twice  to  return to the full time display. (5) Trip/flight   timer   mode   (FT).      Press   the MODE button to advance the annunciator to  FT.    Press the ST-SP button and verify that the display shows zero. The timer will activate at takeoff and stop at touchdown. To  prevent  an  accidental  reset  of  flight  time,  the  clock cannot be manually reset during flight. (6) Elapsed    time    mode    (ET).        Press    the MODE button to advance the annunciator to   ET.    Press the RST button to set the time display to zero.  Press the ST-SP button one time.  To stop the counting, press the ST-SP   button   a   second   time.      Ending   time   will   be displayed until the  RST   button   is   pressed   to   clear   the   display.      The clock may be used in other modes and the elapsed time display   will   remain   until   cleared   by   pressing   the   RST button.  If the timer is counting when the   RST  button  is pressed,  the  display  will  reset  to  zero  and  the  count  will begin again from zero. (7) Downcounter    mode    (DC).        Press    the MODE button to advance the annunciator to   DC.  Press the  SET  button  twice  to  reset  the  hour  display  to  zero. Press and hold the   ADV  button  until  the  desired  hour  is displayed.    Press  the  SET   button,   again,   to   reset   the minute display to zero.  Press and hold the   ADV  button until  the  desired  minute  is  displayed.    Press  the   SET button,   again,   to   reset   the   seconds   display   to   zero. Press and hold the  ADV button until the desired second is  displayed.    Press  the   SET  button,  again,  to  arm  the counter.  Press the  ST - SP button to begin countdown. When the countdown reaches zero, the display will flash for   approximately   one   minute   and   then   reset.      The countdown  may  also  be  reset  at  any  time  by  pressing the ST - SP button. Section XII.  SERVICING, PARKING, AND MOORING 2-89. GENERAL. The   following   paragraphs   include   the   procedures necessary to service the aircraft except lubrication.  The lubrication requirements of the aircraft are covered in the aircraft  maintenance  manual.    Tables  2-9,  2-10,  2-11, and 2-12 are used for identification of fuel, oil, etc.  used to service the aircraft.  The servicing instructions provide procedures   and   precautions   necessary   to   service   the aircraft.  Figure 2-44 shows servicing location points. 2-90. FUEL HANDLING PRECAUTIONS. Table  2-2,  Fuel  Quantity  Data,  lists  the  capacity  of the fuel tanks in the aircraft.  Service the fuel tanks after each flight to keep moisture out of the tanks and to keep the bladder type cells from drying out. Table 2-9.  Approved Military Fuels, Oil, Fluids, and Unit Capacities SYSTEM SPECIFICATION CAPACITY Fuel MIL-T-83133 (JP-8) 540 U.S.  Gals.  Usable Engine Oil MIL-L-23699 10 U.S.  Quarts per engine Hydraulic Brake System MIL-H-5606 1 U.S.  Pint Oxygen System MIL-0-27210 140 Cubic Feet Toilet Chemical Monogram DG-19 3 Ounces BT03858 2-95