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TROUBLESHOOTING PROCEDURE NO. 9
Figure 3-1.  Gravity Refueling ERFS Tanks

TM-55-1560-307-13P AH-1E/F/P/S Helicopter Manual
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TM 55-1560-307-13&P Section IV.  SERVICE/MAINTENANCE PROCEDURES 3-10. MAINTENANCE  PROCEDURES .    The  AVUM procedures  include  servicing,  inspecting,  and  replacing the    ERFS    tanks,    FMCP,    ECP,    hose    assemblies, pressure switches, and fuel pumps. 3-11. SERVICE.        The    600    gallon    tanks    will    be serviced with JP-4, -5, -8 fuel as required.  Utilize splash fill   or   pressure   refueling   techniques,   Figures   3-1   and 3-2. CAUTION ·    Assure  tank  filler  caps  are  free  of  sand and any other foreign matter. ·    Check  each   tank   internally   for   foreign objects,  sand  and  water,  and  remove  as appropriate.        Ensure    the    inspection includes the dump valve opening located at the bottom front of each tank. ·    Hoses and pump board must be opened and   inspected   for   foreign   material   or damage prior to being installed. ·    Inspect   fuel   filter   for   foreign   material, damage, and serviceability. ·    Upon  first  fueling  of  each  tank,  use  the splash  fill  method  with  25  to  50  gallons of  fuel  in  both  the  forward  and  aft  fill caps and be sure to wash all sides of the tank. ·Obtain a fuel sample from each tank.  If fuel is    found    contaminated,    defuel    tank, clean,    and    refill    again    as    described above.    Repeat  until  an  acceptable  fuel sample  is  obtained,  then  fill  the  tank  to the desired level. 3-12. MAINTENANCE OF ERFS TANK COMPONENTS. GRAVITY REFUELING. This task covers: a. Grounding procedures. b. Fuel servicing tanks. INITIAL SETUP Tools: Flashlight (explosion proof) Personnel required: (4/MOS 67U) Materials/Parts: Fuel JP-4, -5, -8, (items 7, 8, 9, Appx D) Equipment Conditions: Refer to Figure 3-1. Aircraft shutdown and all electrical power off. Refueling vehicle parked minimum of 10 feet from helicopter. Helicopter on level ground parked at least 50 feet from any structure. Helicopter grounded. Fuel vehicle grounded. Fuel tank grounded to aircraft. REFUELING 1. Connect   hose   grounding   lead   (1)   to   tank   ground receptacle (2). 2. Remove filler port cap (3). 3. Ensure   that   the   tank   cam   lever   dump   valve   is closed. 3-11







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