AWNOT-017-AWRG-2.1 dated 17th March 2011 - Civil Aviation ...

DEFINITION AND INTERPRETATION OF TERMSD56. SCHEDULE:D56.1 Each part of the aircraft, engines and propellers, the accessories, instruments andequipment, and the recommended periods at which as appropriate, they should-becleaned, inspected, adjusted, tested and lubricated, and the degree of inspectionrecommended at the period quoted. The recommended periods at which componentsand accessories shall be overhauled and, as appropriate, the mandatory, retirement orultimate (scrap) lives and a cross-reference to the section of the Engine OverhaulManual which lists retirement or ultimate (scrap) lives of engine parts.D57. STANDARD ATMOSPHERE:D57.1 An atmosphere defined as follows:D57.1.1 The air is a perfect dry gas;D57.1.2 The physical constants are:Sea level mean molar mass:M0 = 28.964420 x 10ֿ³ kg molֿ¹Sea level atmospheric pressure:P0 = 1013.250 hPaSea level temperature:t0 = 15°CT0 = 288.15 KSea level atmospheric density:p0 = 1.2250 kg mֿ ³Temperature of the ice point:Ti = 273.15 KUniversal gas constant:R* = 8.31432 JKֿ ¹molֿ ¹D57.1.3 The temperature gradients are:Geopotential altitudeTemperature gradient(Km)(Kelvin per standardgeopotential kilometre)From To-5.0 11.0 -6.511.0 20.0 0.020.0 32.0 +1.032.0 47.0 +2.847.0 51.0 0.051.0 71.0 -2.871.0 80.0 -217/03/2011 Page 8 of 10 AWNOT-017-AWRG-2.1