up area an area which is full of houses, shops, offices, and other buildings, and with very little open space
bulb /bAlb/ noun 1. a glass ball inside a lamp that gives electric light 0 If a lamp does not work, the bulb may need replacing. 2. something shaped like a lamp bulb 0 The most common type of hygrometer is the wet and dry bulb ther-mometer arrangement.
bulkhead /'bAlkhed/ noun a dividing partition across the structure of the fuselage separating one compartment from another for reasons of safety or strength 0 A fireproof bulkhead is pro-vided to separate the cool area of the engine from the hot area.
bulletin 36
bulletin /bυl.t.n/ noun a short report or information on a situation . news bulletin . weather bulletin . A terminal aerodrome forecast bulletin may consist of forecasts for one or more aero-dromes.
BUMF . mnemonic burble /bb(.)l/ noun a break in the
flow of air around an aircraft’s wing, which leads to turbulence burst /bst/ noun 1. a minor explo-
sion caused by increased pressure . The risk of tyre burst through overheating is increased by hard application of the brakes. 2. a very short period of activity followed by no activity . The ground installation transmits a code in two short bursts. . burst of energy a very short period of energy . verb to explode because of increased pressure or punc-ture . Metal debris on the runway may cause a tyre to burst. (NOTE: bursting – burst)
busbar /bsbɑ/ noun an electrical conductor used to carry a particular
power supply to various pieces of equipment . Complex busbars are thick metal strips or rods to which input and output connections are made.
button /bt(.)n/ noun a little round disc which you push to operate some-thing, e.g. to ring a bell
Buys Ballot’s Law /ba.z bl.ts l./ noun a rule for identifying low pressure areas, based on the Coriolis effect
COMMENT: In the northern hemisphere, if the wind is blowing from behind you, the low pressure area is to the left, while in the southern hemisphere it is to the right.
buzz /bz/ verb to fly low in an aircraft over people or buildings, or to fly across the path of other aircraft
bypass /ba.pɑs/ noun 1. an alterna-tive pipe, channel, etc. . A turbine bypass in the form of an alternative exhaust duct is fitted with a valve. 2. same as shunt
C
C symbol 1. Celsius 2. centigrade
CAA abbreviation Civil Aviation Authority cabin /kb.n/ noun a passenger com-
partment in an aircraft . Air enters at the front of the cabin and leaves at the rear.
cabin attendant /kb.n .
tend.nt/ noun member of the flight crew who looks after passengers, serves food, etc. . If you need something, press the call button and a cabin attendant will respond within a few minutes. Also called flight attendant
cabin compressor and blower system /kb.n k.mpres. .n bl.υ. s.st.m/ noun part of the air conditioning system for the cabin
cabin crew /kb.n kru/ noun air-line staff who are in direct contact with the passengers and whose in-flight responsibilities include: ensuring cor-rect seating arrangements, serving food and attending to the general well-being of passengers, etc.
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