supplemental type certificate
/spl.ment(.)l ta.p st.f.k.t/ noun a certificate issued by an airwor-thiness authority to indicate that a mod-ification to an aircraft or engine design has been approved. Abbreviation STC
supplementary /spl.ment(.)ri/
adjective extra or additional . supple-mentary information

supplementary angle
/spl.ment(.)ri .(.)l/ noun an angle that, when added to a given angle, makes 180°
supply /s.pla./ noun the amount of something available for use . An engine requires an adequate supply of oil. .
verb to make available for use, to pro-vide . A battery is designed to supply limited amounts of electrical power.
(NOTE: supplies – supplying – sup-
plied) support /s.p.t/ noun 1. a device to hold something in position . Direct-reading indicators consist of a float contained within a metal support tube.
2. practical assistance . verb to bear the weight of . The wings support the air-craft in flight.

support facilities /s.p.t f.
s.l.tiz/ plural noun equipment and buildings used by ground staff when working on aircraft at an airport
support services /s.p.t sv.s.z/ plural noun services provided to an aircraft while it is at an airport
suppress /s.pres/ verb 1. to prevent the development or spreading of some-thing . the fire crew suppressed the fire the fire crew brought the fire under control 2. to prevent electrical interfer-ence from affecting a radio signal . R/T noise interference can be suppressed.

suppressed antenna /s.prest n
ten./ noun an antenna which is mounted under the airframe skin .