AMC E 745 Engine Acceleration

• ED Decision 2007/015/R found in: CS-E Amdt 5 - Engines (Dec 2018)

AMC E 745 Engine Acceleration ED Decision 2007/015/R (1) Compliance with [CS-E 745](#_DxCrossRefBm1371447601) may be demonstrated during tests performed to meet other sections of CS-E. (2) In complying with [CS-E 745(a)(1) and (a)(2)](#_DxCrossRefBm1371447601) for evaluation of a potential ‘over-temperature’, the appropriate adverse combination is probably ‘maximum bleed air and maximum power extraction’. For evaluation of ‘surge’ and ‘stall’, the combination should probably be ‘no bleed air and maximum power extraction’. An ‘over-temperature’ event is considered as being any exceedence of the steady state and transient values which are substantiated under [CS-E 740](#_DxCrossRefBm1371447586). (3) The ‘minimum test bed idle’ which is referenced for rotorcraft Engines in [CS-E 745(a)](#_DxCrossRefBm1371447601) or other CS-E paragraphs is the minimum practically possible power extraction from the Engine in the test facility while the output shaft is at the governed speed. (4) If, when complying with [CS-E 745(a)(3)](#_DxCrossRefBm1371447601), an acceleration time longer than 5 seconds is experienced, the justification should address operational aspects as well as aircraft certification specifications for the intended installation. For example, this would be considered for the very large engines which could have a difficulty in meeting exactly the 5 seconds because of the inertia of their rotors or other reasons. [Amdt No: E/1]