Aviation Technical English for aircraft maintenance engineers (Авиационный технический английский язык для студентов-авитехников)

56 Ground clearance is the distance between the bottom of the engine and the ground. Fan Blade clearance is the distance between the tip of the fan blades and the casing. FASTENED (attached, secured, maintained in position [usually unfastened easily]). The seat belts are fastened during take-off and landing. FITTED (precisely installed, mounted [permanent installation]) The cross beams are fitted to the frames. FIXED (attached) The Map Light is fixed to the flight deck wall on a bracket. HANG, HUNG (suspend, suspended) For installation, the engine is hung from a hoist. HINGED (articulated on free-rotating connection) The Rudder is hinged on the Vertical Stabilizer. HOOKED (maintained in position by a hook or latch) The gear doors are hooked by an up-lock box. INSTALLED ([most general word of connection] mounted on, fitted to) The APU is installed in the tail cone. MATED (joined together, two matched surfaces connected) The wings are mated on the wing center box. MOUNTED (installed + on, under, above, below, over, etc.) The radio navigation antennas are mounted on the fuselage centerline. PLAY (distance of free movement [see also clearance]) The play in the mechanism must not exceed 3 mm.