EXIT  UNIT  ASSEMBLY.—The  exit  unit assembly removes rounds from the transporter and places them into the elements. Two gear-driven sprocket assemblies are used to transfer the rounds from the transporter to the elements. You can time the exit unit assembly by inserting a pin through the cover, through a hole in one of the gears, and into a hole in the housing. INTERFACE UNIT ASSEMBLY.—The inter- face unit assembly transfers the rounds coming from the exit unit assembly to the aircraft system and the spent cases coming from the aircraft system to the elements going to the entrance unit. A bypass mode of operation permits the rounds to be cycled through the transporter/conveyor system without an interchange of rounds at the interface unit. The interface unit assembly has a gearbox drive that drives the transporter/conveyor system at the speed required for correct hand-off between the interface unit and the aircraft system. The three gear-driven sprockets control the elements and rounds as they pass through the interface unit assembly. A resettable counter indicates the number of rounds that have been loaded into the aircraft system. ENTRANCE UNIT ASSEMBLY.—The entrance unit assembly removes spent cases/cleared rounds from the elements and places them into the transporter. There are    three    gear-driven    sprockets    that    control    the elements  and  spent  cases  as  they  pass  through  the entrance  unit  assembly.  A  counter  indicates  the  total number of elements that have been cycled. DRUM DRIVE ASSEMBLY AND FLEXIBLE DRIVE SHAFT.—The    drum    drive    assembly    is mounted  on  the  exit  end  of  the  transporter  and  drives the  transporter  drum.  The  drive  power  is  transmitted from the interface unit to the drum drive assembly by the flexible drive shaft. REVIEW NUMBER 1 Q1. List  the  components  of  the  Linkless Ammunition Loading System (LALS). Q2. How   many   rounds   of   electrically   primed M50/PGU ammunition can be loaded on the components of the LALS? Q3. What weapons skid is used with the LALS? Q4. What is the purpose of the loader ammunition transporter? Q5. What   is   the   purpose   of   the   drum   loader assembly? Q6. What is the purpose of the conveyor system? Q7. What  components  transfer  rounds  from  the transporter  to  the  elements  in  the  exit  unit assembly? Q8. The   drive   power   is   transmitted   from   the interface unit to the drum drive assembly by the ______________. OPERATION Operation of the LALS is divided into three modes: loading/downloading  the  transporter,  loading/  down- loading aircraft gun systems and bypass. Loading/Downloading Transporter Ammunition    primers    are    exposed    when    you conduct  transporter  loading/downloading  operations. Therefore,  loading/downloading  must  be  done  in  a RADHAZ safe area. As you read this section, refer to figure 7-17. When you are loading the transporter, attach the timed drum loader assembly to the timed drum entrance cover of the transporter, and attach the timed drum unload assembly to the timed drum exit cover. If you are simultaneously loading/downloading,   attach   both   the   timed   drum loader  assembly  and  drum  unload  assembly  to  the timed drum entrance cover and to the timed drum exit cover.   When   downloading   only,   the   transporter   is driven by a hand crank in the retainer at the center of the entrance   end   of   the   transporter.   When   loading   or simultaneously loading/downloading, the transporter is driven by the load unit assembly. Ammunition is placed in the load tray of the drum loader  at  the  specified  ratio.  The  curve  and  tilt  of  the tray lets the rounds roll freely toward the elements. As the  hand  crank  drives  the  load  unit  assembly,  each element picks up one round and carries it through the ammunition  chute  to  the  load  unit  assembly.  As  the rounds enter the ammunition chute, the rounds counter is actuated. The load unit assembly removes the rounds from  the  elements  and  places  them  in  the  retainer partitions  of  the  drum  entrance  cover.  The  scoop  disk assembly    removes    the    rounds    from    the    retainer partitions  and  places  them  into  the  drum  partitions, where  the  inner  drum  (helix)  moves  them  from  the entrance  cover  toward  the  exit  cover.  Since  there  is  a space in the outer drum where no controlling partitions exist,  a  cam  on  the  outer  drum  engages  a  pin  on  the scoop  disk  assembly  that  closes  the  scoop  extension. With  the  scoop  extension  closed,  no  rounds  can  be 7-14