TM  55-4920-403-20&P 4920-EG-056  (figure  D-2)  for  shelter  wiring,  4920- EG-058   (figure   D-4)   for   cable   wiring   and   4920- EG-077  (figure  D-5)  for  power  distribution  panel wiring. d.  Power   cables   may   be   field   repaired   using a   standard   blade   screwdriver   to   replace   con- nector.  (Refer  to  drawing  4920-EG-058  (figure  D- 4).) e.   Repairs   to   the   shelter   itself   should   follow the guidance given in the shelter TB 43-0124. f.   Compressed   air   service   panel   is   provided to  route  air  from  an  outside  air  compressor  into each shelter. g.   Duplex   type   weatherproof   electrical   outlet located   on   the   power   inlet   panel   is   provided   to power  trouble  lights  and  hand  tools  used  outside each shelter. 1-10.   Shelter   Components   and   Location.   For shelter   components   and   location,   refer   to   draw- ings  4920-EG-054  (figure  D-1)  and  4920-EG-057 (figure  D-3). a. Angle  iron  frames  and  brackets,  as  illus- trated  in  figures  D-1  and  D-2,  are  secured  to  the shelter  floor  and  walls. b.  The  work  table  (item  5,  figure  D-1)  is  se- cured  to  the  right  wall  and  floor  by  brackets. c. Wall  mounted  shelf/table  (item  3,  figure  D- 1 ) is secured to the left wall of shelter. d.  The   environmental   control   unit   (ECU)   is secured   to   its   support   item   11,   figure   D-2) through  the  opening  in  the  back-wall  of  the  shel- ter  for  operation  and  secured  to  bracket  assembly (item 6, figure D-2) for storage and shipment. e. The vise (item 11, figure D-3) and grinding machine  (item  12,  figure  D-3)  are  mounted  on  the work  table  located  on  the  right  side  of  the  appro- priate  shelter  as  shown  in  drawing  4920-EG-057 (figure D-3). f. Storage   space   is   provided   in   the   drawers of  the  work  table  for  storing  other  components  of the  shop  set.  These  components  will  normally  be received  on  initial  shipment  in  boxes  strapped  to the  shelter  floor.  It  will  be  the  responsibility  of  the aviation  unit  repairman  to  unpack,  check  items  for quantity   and   serviceability,   and-stow   them   in drawers  of  the  appropriate  work  table  (item  5,  fig- ure D-1). g.  Components  of  the  AVUM  No.  2  tool  set  are listed  and  illustrated  in  Supply  Catalog  SC  4920- 99-CL-A92. 1-11.  Tabulated  Data. a. Type  of  construction:  stressed  skin  alumi- num  foam-core  with  laminated  bond  between  skin and  foam-core. b.   Dimensions   of   the   shelters   are   as   follows: Maximum  outside  dimensions  (inches) Shelter Type No. Length Width Height S-280/G 147 87 83-3/8 c. Phase d. ECU). e. using Power   requirement:   208   volt   60   Hz   3 4 wire. Weight:   2200   pounds   per   shelter   (less Transportability: (1)   Ground   handling   is   accomplished   by dolly  set  M-720  with  brackets  installed  on each shelter by fork lift or crane. When   transporting   a   shelter   by   air, avoid  dropping  the  shelter  or  sudden jerks on the lifting rings, since serious structural damage wiII result. 1-2 Change 2 (2)   Shelters   are   airmobile   by   helicopter sling  loading  and  by  regular  air  cargo  shipment. (Refer to TB 43-0124.) 1-12.  Electrical  Power. a. Electrical  power  is  transmitted  from  a  60 Hz   mobile   electric   generator   through   the   power distribution  panel  to  the  shelters  by  a  heavy-duty power cable. Be  sure  generator  is  set  for  208V  3 phase  operation.