certain (adj)  SURE, SOME  IF YOU ARE NOT SURE, DO THE TEST AGAIN.  If you are not certain, do the test again.
       SOME BOLTS ARE SHORTER THAN THE OTHERS.  Certain bolts are shorter than the others.
 certify (v)  WRITE, APPROVAL  WRITE THE CHANGE IN THE LOGBOOK.  Certify the change in the logbook.
       GET APPROVAL FROM YOUR SUPERVISOR FOR THE REPAIR.  Get the supervisor to certify repair.
 chafe (v)  RUB  DO NOT LET THE WIRES RUB.  Do not let the wires chafe.
 chafed (adj)  WORN  EXAMINE THE TUBING FOR WORN AREAS.  Inspect the tubing for chafed areas.
 chance (by chance) (n)  RISK, ACCIDENTALLY (adv)  IF THERE IS A RISK OF LEAKAGE, PUT A CONTAINER BELOW THE UNIT.  If there is a chance of leakage, put a container below the unit.
       IF THE LEVER MOVED ACCIDENTALLY, DO THE TEST AGAIN.  If by chance the control lever has been moved, do the test again.
 CHANGE (n)  That which occurs when something changes  THE COLOR CHANGE SHOWS THAT THE TEMPERATURE IS TOO HIGH.  
CHANGE (v),
 CHANGES, CHANGED, CHANGED  To become or to cause to become different
 NOTE : For other meanings, USE: REPLACE.  THE WARNING CHANGES TO "WHOOP WHOOP".  
 channel (v)  CHANNEL (TN)  INSTALL THE WIRES IN THE CHANNEL ALONG THE FUSELAGE.  Channel the wires along the fuselage.

 
 
 characteristic (n)  PROPERTY, QUALITY  THE PROPERTIES OF THESE SEALANTS PREVENT CORROSION.  The characteristics of these sealants prevent corrosion.
       DO NOT USE MATERIAL XXXX BECAUSE IT DOES NOT HAVE THE NECESSARY QUALITIES.  Don't use material XXXX because it doesn't have the right characteristics.
 CHARGE (v),
 CHARGES, CHARGED, CHARGED  To add electrical energy to
 NOTE : For other meanings, USE: FILL and / or PRESSURIZE  CHARGE THE BATTERY.  
 CHECK (n)  The procedure you do to make sure something operates correctly  DO A CHECK OF THE HYDRAULIC SYSTEM.  
 check (v)  MAKE SURE, CHECK (n), MEASURE, EXAMINE  MAKE SURE IT IS SAFE TO SUPPLY ELECTRICAL POWER.  Check it is safe to apply electrical power.
       DO A LEAKAGE CHECK OF THE XXXX.  Check XXXX for leakage.
       MEASURE THE DISTANCE BETWEEN THE FACES.  Check the distance between the faces.
      EXAMINE THE CASTING FOR CORROSION.  Check the casting for corrosion.