decelerate (v)  DECREASE, SLOWER (adj)  MAKE SURE THE ENGINE RPM DECREASES TO XXXX.  Check that engine decelerates to XXXX.
       TO MAKE THE CURING PROCEDURE SLOWER, DECREASE THE HEAT.   The curing process can be decelerated by decreasing the heat.
 decide (v)  DECISION (n), FIND  IF YOUR DECISION IS NOT TO REPLACE THE UNIT, MONITOR ITS TEMPERATURE FOR A MINIMUM OF 15 CYCLES.  If you decide not to replace the existing unit, watch its temperature for at least 15 cycles.
       DO THE TESTS TO FIND HOW MUCH MAINTENANCE IS NECESSARY.  Do tests to decide level of maintenance required.
 DECISION (n)  The result after you think about a problem  MAKE A DECISION ABOUT THE PROCEDURE YOU WILL USE.  
 decontamination (n)  CLEAN (v), REMOVE CONTAMINATION  CLEAN THE AIRCRAFT IN AN APPROVED AREA.  The decontamination of the aircraft shall be done in an authorized area.
      REMOVE THE CONTAMINATION FROM THE FUEL TANKS.  Do the decontamination of the fuel tanks.
 decrease (n)  DECREASE (v)  THE PRESSURE MUST DECREASE MORE THAN 2 BAR.  There must be a decrease of pressure of more than 2 bar.
 DECREASE (v), DECREASES, DECREASED, DECREASED  To make or become smaller or lower  DECREASE THE HEADING INDICATIONS.  
 decrement (n)  INCREMENT  TURN THE ADJUSTER COUNTERCLOCKWISE IN INCREMENTS OF 60 DEG.  Turn the adjuster anti-clockwise in decrements of 60 deg.
 DE-ENERGIZE (v), DE-ENERGIZES, DE-ENERGIZED, DE-ENERGIZED  To remove power (TN) from  DE-ENERGIZE THE AC AND DC BUSES.  

 
 
 DEFECTIVE (adj)  Unserviceable for operation  REPLACE THE DEFECTIVE BOOSTER PUMP.  
 define (v)  CALCULATE, SPECIFIED (adj), GIVE  CALCULATE THE QUANTITY OF FUEL NECESSARY FOR THE FLIGHT.  Define the amount of fuel required for the flight.
       THE FLAP ANGLES ARE SPECIFIED IN TABLE 1.  Table 1 defines the flap angles.
       THE BRAKE INDICATOR GIVES THE WEAR ON THE BRAKE SHOE.  The brake indicator defines the wear on the brake shoe.
 DEFLATE (v), DEFLATES, DEFLATED, DEFLATED  To release the pressure (TN) from a flexible container (TN)  DEFLATE THE TIRES.  
 deflect (v)  MOVE  THE BARS MOVE TO THE RIGHT SIDE.  Bars deflect to the right.
 deflection (n)  MOVEMENT, POSITION, TRAVEL  REMOVE ALL THE RIGGING PINS AND EQUIPMENT THAT PREVENT FREE MOVEMENT OF THE CONTROL SURFACES.  Remove all rigging pins and equipment preventing free deflection of control surfaces.