10%  may  be  applied  to  equipment  in  phased maintenance  aircraft. The  five  different  types  of  life  rafts  used  in naval aviation are the LR-1 and LRU-7/P, which are  one-man  rafts;  the  LRU-12/A,  which  is  a four-man  raft;  the  LRU-13/A,  which  is  a  seven- man raft; the LRU-14 series, which is a 12-man raft, and the LRU-15/A, which is a 20-man raft. You may be required to work on only one or you may work on all of them. All require the same three   inspections—preflight,   special,   and calendar/phase. The  preflight  inspection  is  performed  on fuselage-installed life rafts before the first flight of  the  day.  This  inspection  is  done  by  line personnel  (plane  captain  or  delegated  aircrewman) who  have  been  designated  by  the  line  division officer,  instructed,  and  found  qualified  by  the aviators  equipment  branch. The   special   inspection   is   performed   on fuselage-installed  life  rafts  every  30  days.  This inspection is made at the organizational level of maintenance  by  personnel  assigned  to  the  aviators equipment   branch.   Upon   completion   of   the inspection, the date of inspection and inspector’s signature  are  entered  in  the  inspections  section  of the  Aviation  Crew  Systems  History  Card. To  perform  a  preflight/special  inspection, visually  inspect  for  the  following: 1. 2. 3. 4. 5. 6. Fabric  for  cuts,  tears,  deterioration,  and abrasion Seams  for  proper  adhesion  or  stitching Straps and handles for security and wear Any  other  parts  for  wear,  damage,  and security All  hardware  for  security  of  attachment, corrosion,  damage,  wear,  and,  if  ap- plicable,  ease  of  operation Life raft retaining line for proper stowage CAUTION DO   NOT   OPEN   RAFT   ACCESS DOORS, RSSK KITS, OR ANY SEALED OR   SAFETY-WIRED   PORTION   OF THE LIFE RAFT FOR THIS INSPEC- TION. Subject each life raft to the calendar/phase inspection  before you place it in service, or if it is  an  aircraft  inventory  item  at  the  time  of  the aircraft   acceptance   inspection.   Thereafter,   the calendar/phase inspection interval coincides with the aircraft inspection cycle in which it is installed. See the applicable Planned Maintenance System (PMS)  publications  for  specific  intervals.  In  no case will the interval exceed 231 days except that the LR-1 (RALSA) inspection is not to exceed 453 days.  Unless  operational  requirements  demand otherwise, the life raft calendar/phase inspection is   performed   at   the   intermediate   level   of maintenance  or  above. The   acceptance/calendar/phase   inspection consists  of  the  following  major  tasks  (to  be performed  in  the  order  listed): 1. 2. 3. 4. 5. 6. 7. 8. Container/case    inspection Functional  test  (if  required) Pull  cable  proof  load  test  (if  required) Visual Inflation  assembly  inspection Leakage Records  updating Repacking Details are listed in NAVAIR 13-1-6.1. A  functional  test  and  pull  cable  proof  load  test are  performed  prior  to  placing  a  raft  in  service or during an aircraft acceptance inspection, and each fourth inspection cycle thereafter. You must make  a  leakage  test  at  each  inspection  cycle.  If the  inspection  indicates  any  damage  beyond capability of maintenance, you must forward the entire  assembly  to  supply. DETERMINATION   OF REPAIRABILITY Life  rafts  are  considered  beyond  repair  for  any of  the  following  reasons: 1. 2. 3. 4. 5. 6. Porous  fabric  areas  on  tubes Split  or  open  tube  seams Leakage  test  failure  resulting  from  other than  a  cut,  tear,  or  puncture Damaged  or  malfunctioning  inlet  valve, manifold,  or  oral  inflation  tube Damaged   or   malfunctioning   topping-off valve   that   cannot   be   corrected   by replacement  of  the  topping-off  valve opening  insert Multiplace  rafts  (leaky  bulkheads) FUNCTIONAL  TEST Before  functionally  testing  a  life  raft,  you should  make  sure  you  have  enough  area  to  inflate 6 - 2