halve (v)  HALF (TN)  MAKE SURE THE PITCH DECREASES TO HALF THE VALUE.  Check that deviation in pitch is halved.
 handle (v)  MOVE, TOUCH, CAREFUL (adj)  MOVE THE ACTUATOR WITH A HOIST.  Handle the actuator with a hoist.
       DO NOT TOUCH THE PRINTED CIRCUIT CARD.  Do not handle the printed circuit card.
       BE CAREFUL WITH THE INSTRUMENTS.  Handle instruments with care.
 hand-tighten (v)  TIGHTEN WITH YOUR HAND (TN)  TIGHTEN THE SWIVEL NUT WITH YOUR HAND.  Hand-tighten the swivel nut.
 HANG (v),
 HANGS, HUNG, HUNG  To attach or to be attached to something above with no support (TN) from "below"  HANG THE SHACKLE ON THE HOIST.  
 happen (v)  OCCUR  IF AN ACCIDENT OCCURS, GET MEDICAL AID.  If an accident happens, get medical attention.
 HARD (adj)
 (HARDER, HARDEST)  Not easy to cut, not easy to go into or through  IF THE SURFACE IS HARD, USE A CARBIDE DRILL.  
 harmful (adj)  DANGEROUS, DAMAGE (n)  XXXX FUMES ARE DANGEROUS.  XXXX fumes are harmful to health.
      HYDRAULIC FLUID CAN CAUSE DAMAGE TO YOUR SKIN.  Hydraulic fluid is harmful to your skin.
 harmonize (v)  AGREE, ALIGN  MAKE THE SETTINGS OF THE VALVES AGREE.  Harmonize the settings of the valves.
       ALIGN THE CENTERLINE ON THE FLUX VALVE.  Harmonize the centerline on the flux valve.
 HAVE (v),
 HAS, HAD, HAD  To "possess" as a part or quality  THE SYSTEM HAS AN EMERGENCY WARNING DEVICE.  

 
 
 hazard (n)  DANGEROUS (adj)  TRICHLOROETHYLENE IS DANGEROUS.  Trichlorethylene is a health hazard.
 hazardous (adj)  DANGEROUS  ALL PERSONNEL WHO TOUCH DANGEROUS MATERIALS MUST OBEY THE SAFETY INSTRUCTIONS THAT FOLLOW.  All personnel in contact with hazardous materials must obey the following safety instructions.
 HEAD (n)  The top of something  MAKE SURE THE HEAD OF THE BOLT IS DOWN.  
 head (v)  POINT, TURN  POINT THE AIRCRAFT IN THE DIRECTION OF THE WIND.  Head aircraft into the wind.
       TURN THE AIRCRAFT INTO THE WIND.  
 HEAR (v),
 HEARS, HEARD, HEARD  To know by sound in the ear (TN)  MAKE SURE YOU HEAR THE AUDIO SIGNALS IN ALL THE CREW HEADSETS.  
 HEAT (n)  Energy (TN) as a result of movement of molecules (TN)  USE HEAT TO CURE THE POLYSULPHIDE SEALANT.