PREPARATIONS Before  changing  components  on  a  GTE,  be  sure  that the  replacement  parts  and  tools  needed  to  do  the  job  are available.  Inspect  all  measuring  devices  (such  as  torque wrenches,   meters,   and   micrometers)   to   ensure   they   are in  calibration.  Also  be  sure  that  you  and  your  team  have read   the   proper   technical   manual   procedures. One   method   that   helps   ensure   proper   use   of   the technical   manual   procedures   is   to   provide   team members   with   a   copy   of   the   procedures.   Have   them check  off  each  step  as  it  is  completed ESTIMATED  TIME  OF  REPAIR When  making  an  estimated  time  of  repair  (ETR), you   must   be   as   accurate   as   possible.   Your   ETR   could ultimately  affect  the  operational  schedule  of  the  ship. Take  into  account  all  the  factors  that  may  affect  an  ETR, such  as  capabilities  of  your  personnel,  availability  of materials,   test   procedures,   preparations,   and   time   for unexpected   delays. REPLACEMENT As  a  supervisor,  your  primary  concern  is  for  the safety   of   your   personnel   and   equipment.   As   a responsible   petty   officer,   you   set   the   example.   Short cuts  that  go  around  safety  precautions  do  not  save  time. You   can   prevent   accidents   and   save   time   by   explicitly following  safety  precautions  and  actively  using  safety programs  such  as  tag-out  and  electrical  safety. During  component  changeout,  keep  track  of  tools going  into  and  out  of  the  GTE  enclosure.  Be  sure  your personnel  use  care  when  removing  lockwires,  cannon plugs,  and  so  forth.  Tag  and  bag  all  bolts,  nuts,  washers, and   interferences   that   are   removed   for   reinstallation. Capping   fluid   lines   will   prevent   contamination   of   open systems.   Use   care   when   replacing   GTE   components. Most   problems   that   arise   after   component   replacement are  easily  avoided.  Just  remember  to  work  carefully  and always   follow   the   procedures   listed   in   the   technical manuals. COMPLETION   OF   REPAIRS After   GTE   repairs   are   complete,   ensure   that   the proper   entries   are   made   in   the   MGTESR.   and Engineering   Log.   If   the   replaced   component   is   from selected  equipment,  make  sure  you  follow  procedures outlined   in   NSTM,   chapter   234,   “Marine   Gas   Turbine Equipment  Log  Books  and  Service  Records,”  section  8. When   preparing   turn-in   components   for   shipment, plug  or  cap  all  openings.  Do  not  take  the  components apart   to   look   inside.   You   may   damage   the   component and   distort   the   findings   of   the   testing   facilities.   The repair   activity   must   make   a   determination   of   cause   of failure.   Other   activities   collect   and   use   information   on failed   components   to   create   design   improvements. LM2500   ENGINE   CHANGEOUT At  some  point  in  your  career,  you  may  have  the opportunity   to   supervise   an   engine   changeout.   This section   discusses   this   topic   from   a   supervisory standpoint. For   more   information   on   procedures   for engine   changeout   and   post   changeout   adjustments,   you should  consult  the  Propulsion   Gas   Turbine   Module LM2500,  volume  2,  part  3;  the  Gas  Turbine   Generator Set,  volume  2;  and  the  Team   Leader   Guide   for   FFG-7 Class   Ships   or  the  Team   Leader   Guide   for   DD-963 Class  Ships,  as  applicable. PREPARATION Planning   a   full-scale   evolution   such   as   a   GTE changeout   takes   effort,   coordination,   and   drive.   Careful planning   is   an   essential   ingredient   to   your   effective supervision  of  a  GTE  changeout.  You  can  reduce  delays and  confusion  by  anticipating  the  needs  of  escorts  and clearances    for    intermediate    maintenance    activities (IMAs),   civilians,   and   other   personnel   involved. An   organizational   meeting   of   all   personnel, including   those   involved   with   ancillary   tasks   (crane operators,   hook   tenders,   riggers,   and   so   forth),   is necessary   to   plan   the   evolution.   At   the   meeting   you should   inform   each   individual   of   his   or   her responsibility  to  the  overall  team  effort.  Explain  how each  job  affects  the  effort  and  completion  schedule.  You should   distribute   monitoring   guides   and   inventory   lists to  the  parties  concerned  with  an  explanation  of  how  and when   to   use   them.   During   the   meeting,   you   should clarify   the   time   frame   established   for   each   task completion.   Having   given   personnel   clear   directions, you   can   expect   them   to   perform   the   procedures   on schedule.  They  should  not  be  surprised  when  you  arrive for  a  checkpoint  verification.  The  most  important  topic to  emphasize  is  safety.  It  is  your  responsibility  as  team leader   to   ensure   that   all   safety   precautions   are   strictly followed. Assign   a   safety   observer   to   your   changeout   team. His/her   sole   responsibility   is   to   ensure   the   safety   of personnel  working  inside  the  GTE  module  and  uptakes. The   safety   observer   should   ensure   ancillary   personnel 2-29