TM    1-1500-204-23-2 manufacturer by code markings which are repeatedly stenciled  along  the  full  length  of  the  hose. (1)   Markings.   The   identification   markings   will either  be  manufacturer’s  code  number  or  manufacturer’s symbol, also date of manufacture in quarter year and year,  size  of  hose,  and  specification  of  hose  in  numerals (figures  4-34  through  4-38). (2)  Stripe.  The  indicator  stripe  or  code  symbol along  length  of  hose  shall,  in  all  cases,  identify  hose (2)   Store   hose   or   hose   assemblies   on   racks which  support  and  protect  hose  and  hose  assemblies. (3) Store hose or hose assemblies so that older items  are  used  first. c. Replacement of Flexible Hose. Inspection and replacement  of  hose  or  hose  assemblies  will  be  accom- plished  at  inspection  periods  perscribed  in  applicable aircraft  maintenance  manual  or  whenever  defects  listed below  are  evident. manufacturer. (3) Temperature range. The indicator stripe indi- cates that hose is suitable for use through a temperature range  of  -65  to  160°F  (-54  to  71  ºC). (4) Hose. MIL-H-8788. This hose will appear in assemblies   only (a)  Markings.  Hose  in  each  assembly  will  be marked with quarter year and year of manufacture of hose,  hose  size,  specification  number,  and  an  indicator stripe in the form of a yellow dot and dash code, showing direction of natural lay of hose. Markings are repeated at intervals of not more than 9 inches along length of hose. (b) Identification tag. This hose is also iden- tified  by  a  removable  metal  tag  or  band,  installed  at  the factory when hose is assembled, showing part number of hose assembly, date of assembly, and name or trade- mark  of  manufacturer. b. Storage  of  Hose  and  Hose  Assemblies.  Hose  or hose  assemblies  shall  be  stored  as  follows: Do not store hose or hose assemblies in piles. (c)  Inspection.  Rubber  products  should  be To do so will result in decreased strength and carefully  inspected  prior  to  installation  and  during  use  for integrity. weather   checking. (1)  Seal  both  ends  of  bulk  hose.  Cap  or  plug each hose or hose assembly as outlined in paragraph 4-51. (d) Replacement. Replace hose or hose as- semblies  with  weather  checking  that  is  deep  or  wide enough  to  expose  fabric. (7)   Deterioration.   Replace  all  hose  and  hose assemblies showing signs of deterioration indicated by separation  of  rubber  cover  or  braid  from  inner  tube, cracks,  hardening  and  lack  of  flexibility. (2)  Cold  Flow.  Replace  hose  or  hose  assem- blies showing signs of excessive cold flow indicated by deep  permanent  impressions  and  cracks  in  hose  or  cov- er produced by pressure of hose clamps and head of nipple   chafing. (3)  Weather  checking.  Weather  checking  of  rub- ber  is  caused  by  sunlight  and  atmospheric  oxidization. (a)  Early  stages.  Rubber  hoses,  tubing  or rubber outer coated surfaces will show fine line cracks or crazing but will be pliable when squeezed between the fingers or rolled between the hands. This is a sign of the early  stages  of  deterioration. (b)   Advanced   deterioration.   As   deteriora- tion  continues,  the  cracks  and  crazing  become  more prominent,   and   when   the   rubber   hose   or   tubing   is squeezed or rolled, the item will break, shatter, or turn to powder,  thus  becoming  useless. Change  3 4-35