HARD-OVER
EXTRAORDINARY maneuver with a maximum angle of roll or pitch.
HDG HOLD, sm.- HEADING HOLD
HDG SEL, sm.- HEADING SELECT
HEAD END
Cylinder head, a reference landmark for the part on the surface of the piston control mechanism.
HEADING
Courses aimed the plane, the true north or magnetic north.
HAIRLINE CRACK
Hairline cracks, a serious flaw in the structural elements; crack which is visible as a thin line.
HEADING HOLD
AGING COURSE mode autopilot system, which maintains the current rate of the aircraft.
HEADING SELECT
The chosen course, the mode of the autopilot system, where the pilot sets the desired course of the aircraft.
HEADWIND
Headwind, wind or wind component, running in the opposite direction of the aircraft.
HEXADECIMAL NUMBERING SYSTEM
GEKSODETSIMALNAYA number system, number system with sixteen characters as the basis. The system includes the numbers from zero to nine, and letters from A to F, which numbers ten to fifteen.
HOIST
Hoists, lifts, a device for lifting or lowering the engine or heavy components during removal and installation on the aircraft.