FIT (n)  The relation between two related parts, a limit of tolerance  YOU WILL FIND DATA ABOUT THE FITS AND CLEARANCES IN SECTION XXXX.  
 fit (v)  INSTALL, ATTACH, CORRECT (adj)  INSTALL THE DUCT.  Fit the duct.
       ATTACH THE PANEL TO THE AIRCRAFT WITH BOLTS.  Fit the panel to the aircraft with bolts.
       MAKE SURE THE REPAIR PLUG HAS THE CORRECT DIMENSIONS.  Ensure repair plug fits.
 fix (v)  ATTACH, SET, REPAIR, INSTALL  ATTACH THE TRIM WITH DOUBLE-SIDED ADHESIVE TAPE.  Fix the trim with double-sided adhesive tape.
       SET THE LENGTH OF THE CONTROL ROD AS NECESSARY.  Fix length of control rod as required.
       REPAIR THE LOOSE OR DAMAGED UPHOLSTERY.  Fix any loose or torn upholstery.
       INSTALL THE UNIT ON THE XXXX.  Fix the unit on the XXXX.
FLAME (n)  "Burning" gas  IF YOU SEE FLAMES FROM THE EXHAUST PIPE, STOP THE ENGINE.  
 FLAMMABLE (adj)  That burns easily  THE XXXX IS FLAMMABLE.  
 FLANGE (n)  An end surface at an angle (TN)  MAKE SURE THE FLANGE IS NOT DAMAGED.  
 FLASH (v),
 FLASHES, FLASHED, FLASHED  To come on and go off frequently  THE RED LIGHTS FLASH EACH 0.5 SECONDS.  

 
 
 FLAT (adj)
 (FLATTER, FLATTEST)  Has a continuous surface in the same plane (TN)  LUBRICATE ONE SIDE OF THE FLAT WASHERS.