familiar  with  in  electronic  equipment  and  systems. Preventive  maintenance  consists  of  checks  to  determine if   the   equipment   is   functioning   properly,   visual inspection   for   damage,   lubrication,   and   the   like. Corrective   maintenance   includes   the   isolation   of trouble,  the  replacement  of  defective  components,  the realignment and readjustment of equipment, and such, to bring the item to a satisfactory operating level. Preventive  Maintenance A  sound  preventive  maintenance  program  for  test equipment is the key to the reliable operation of test and measuring   devices   needed   for   proper   preventive maintenance of our equipments and systems. In  many  ships,  test  equipment  preventive maintenance has been neglected. People often say that neither the time nor the personnel are available for an effective  preventive  maintenance  program.  However,  if preventive  maintenance is neglected, the requirement for corrective maintenance will grow; it may grow to the point that a critical situation may exist because test equipment   needed   for   preventive   or   corrective maintenance of electronic equipments and systems is broken or improperly adjusted. The   Electronics   Technician   is   responsible   for ensuring  that  all  test  equipment  is  scheduled  for preventive  maintenance.  Preventive  Maintenance  MIP T-1, MRC R-1 applies to ALL test equipment on board. Equipment tech manuals can be used for operational tests and test indications. Take care to ensure that all units of each equipment are checked according to the MRC. Checks in addition to those required by MIP T-1, MRC R-1 maybe annotated on the EGLs that should be completed with MRC R-1. The preventive maintenance schedules  must  be  prepared  according  to  the  preventive maintenance   instructions   of   each   ship’s   type commander. Test  equipment  is  an  important  factor  in  the preventive  and  corrective  maintenance  of  electronic  and systems;  therefore,  a  properly  established  (and  carried out) preventive maintenance program for test equipment will yield a higher availability of operable and calibrated equipment. Corrective  Maintenance Test  equipment  corrective  maintenance  is  the correction of test equipment troubles. This includes the repair of an item after a complete breakdown, the finding of faults during preventive maintenance, or the tuning and adjustment of an item to restore it to operating condition. Many activities and ETs in the fleet are reluctant to repair  electronics  test  equipment;  however,  the  NAVY expects  our  ETs  to  perform  a  certain  amount  of maintenance and repair of their own test equipment whenever possible. The repair parts needed to make repairs may already be aboard ship. It will often be your responsibility to decide when a piece of test equipment should  be  repaired  and  who  should  repair  it.  You  will need  to  consider  the  following  factors. 1. 2. Much of the test equipment now being used by naval activities is expensive and is built and calibrated  to  a  high  degree  of  precision.  Repair often  requires  special  laboratory  facilities  and skill. Although each activity should make all repairs  within  its  capabilities,  the  lack  of qualified personnel or adequate facilities may limit  the  kinds  of  repairs  an  activity  should attempt.  Repairs  attempted  by  unqualified maintenance personnel or personnel working in inadequate facilities could result in extensive damage to equipment. Therefore, you should evaluate   each   piece   of   test   equipment   to determine if your personnel should make the repairs, especially when maintenance of test equipment requires repair of critical calibration or  frequency-determining  circuits.  When  repairs are  made  locally,  technical  manual  procedures should be followed carefully; the repair and assembly of parts must be meticulous. When your personnel cannnot make the repairs, or when the necessary post-verification is beyond the capabilities and facilities of repair personnel, forward   the   equipment   to   the   nearest maintenance   activity   that   has   the   proper f a c i l i t i e s . Calibration  laboratories  are  authorized  to  make only  incidental  repairs,  defined  as  those  found necessary during calibration to bring the item within  specified  tolerances.  Before  submitting an inoperative item of test equipment for repair to a maintenance activity, you should note on an OPNAV Form 4790/2K all faults, symptoms, and   other   malfunction   characteristics   and submit the 2K through the proper channels for repair-action   screening. 7-17