TUNE (v),
 TUNES, TUNED, TUNED  To adjust equipment to the best performance  TUNE ADF 1 TO A KNOWN FREQUENCY.  
 TURN (n)  One full cycle of movement around an axis (TN)  LET THE PRESSURE BECOME STABLE AFTER EACH TURN OF THE ADJUSTMENT SCREW.  
 TURN (v),
 TURNS, TURNED, TURNED  To move or cause to move around an axis (TN) or a point  TURN THE CONTROL CLOCKWISE.  
 twice (adv)  TWO (TN)   DO THIS PROCEDURE TWO TIMES.  Do this procedure twice.
 TWIST (v),
 TWISTS, TWISTED, TWISTED  To use a force (TN) that turns something and causes a distortion (TN)  DO NOT TWIST THE ELEMENT.  
 TYPE (n)  A specified group  FIND THE TYPE AND DIMENSIONS OF THE DAMAGE.  
 TYPICAL (adj)  That has the important qualities of a group  THIS INSTALLATION PROCEDURE IS TYPICAL.  

 
 
 unable (adj)  CANNOT (v)  IF THE PULLEY CANNOT TURN, MAKE SURE THE PIN IS REMOVED.  If the pulley is unable to turn, make sure the pin is removed.
 unauthorized (adj)  NOT APPROVED  IF YOU ARE NOT APPROVED, YOU CANNOT DO THIS ENGINE TEST.  If you are unauthorized, you cannot do this engine test.
 uncap (v)  CAP (TN)  REMOVE THE CAPS FROM THE HOSES.  Uncap hoses.
 unclip (v)  CLIP (TN)  REMOVE THE VISOR FROM THE CLIP.  Unclip the visor.
 uncoil (v)  UNWIND  UNWIND THE CABLES CAREFULLY.  Uncoil the cables carefully.
 uncontaminated (adj)  CLEAN, CONTAMINATION (n)  MAKE SURE THAT THE HYDRAULIC FLUID IS CLEAN.  Check that hydraulic fluid is uncontaminated.
       MAKE SURE THERE IS NO CONTAMINATION IN THE FUEL TANKS.  Check that fuel tanks are uncontaminated.
 uncouple (v)  DISCONNECT  DISCONNECT THE TOW BAR FROM THE AIRCRAFT.  Uncouple the tow bar from the aircraft.
 uncovered (adj)  COVER (TN)  DO NOT PUT A COVER ON THE CONTAINER.  Leave container uncovered.
undamaged (adj)  NOT DAMAGED  MAKE SURE THAT THE SKIN IS NOT DAMAGED.  Check that skin is undamaged.
 UNDEMANDED (adj)  That occurs without an "apparent" cause  IF YOU GET AN UNDEMANDED MOVEMENT, DO A TEST OF THE SYSTEM.  

 
 
 under (pre)  BELOW, IN, LESS THAN  INSTALL THE CABLE THROUGH THE GUIDE TUBE BELOW THE CABIN FLOOR.  Install the cable through the guide tube under the cabin floor.