CS-E 440 Endurance Test

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

CS-E 440 Endurance Test ED Decision 2007/015/R (a) (1) The test must be made in the order defined in the appropriate schedule and in suitable non-stop parts. In the event of a stop occurring during any part, the part must be repeated unless it is agreed to be unnecessary. The complete test may need to be repeated if an excessive number of stops occur. (2) The whole of the endurance test must be run with the oil pressure set to give the declared normal operating pressure at Maximum Continuous conditions except that one hour at Take-off conditions and nine hours at Maximum Continuous must be run with the pressure set to give the declared minimum for completion of the flight at Maximum Continuous conditions. The test conditions may be revised, if necessary, to avoid having to stop the Engine during particular parts in order to reset the oil pressure. (3) Where the operating conditions are prescribed in terms of a percentage of Maximum Continuous Power, the crankshaft rotational speed, power setting and mixture setting (if applicable) mixture setting (if applicable) must be appropriate to the simulation of the most severe cruising conditions at this power. Where in such cases the power setting is not greater than that for Maximum Best Economy Cruising Power Conditions, the mixture setting (if applicable) mixture setting (if applicable) must be compatible with the power setting. (4) Throughout each part of the endurance test, the crankshaft rotational speed and power setting must be maintained at, or as near as possible to, the declared maximum values appropriate to the Engine operating conditions prescribed. A repeat of the run might be required if, for any reason, the observed crankshaft rotational speed and power setting deviate by more than ± 1.5% from the declared maximum values. (5) *Propellers*. A representative flight Propeller must be used during this test. (i) *Variable Pitch Propellers*. The blade setting of the Propeller need not be set precisely as for flight conditions. If, however, the blade setting does not allow the conditions, detailed in the test schedule agreed for the particular Engine, to be achieved, the limitations approved for the Engine will be based on the conditions at which the test is run. (ii) *Fixed Pitch Propellers*. A sufficient number of Propellers, agreed prior to the commencement of the tests, must be used for reasonable approximations to the various power ratings to be made. The number normally acceptable is two, for instance, one primarily suited to Maximum Best Economy Cruising Power Conditions, and the other primarily suited to Maximum Continuous or Take-off conditions. (iii) *Limitations not Simultaneously Attainable*. If a fixed pitch Propeller is fitted for the tests, the Engine must be operated at the maximum power setting or maximum crankshaft rotational speed appropriate to the conditions of the tests, whichever limitation is reached first. (6) The Engine must be subjected to an agreed extent of pre-assembly inspection, and a record must be made of the dimensions liable to change by reason of wear, distortion and creep. A record must also be made of the calibrations and settings of separately functioning Engine components and equipment (e.g. the control system, pumps, actuators, valves). (b) *Schedules* (1) Schedule for Unsupercharged Engines and Engines Incorporating Gear-driven, Single-speed Superchargers Part 1 A 30-hour run consisting of alternate 5 minute periods at Take-off Power and speed and Maximum Best Economy Cruising Power or Maximum Recommended Cruising Power conditions. Part 2 A 20-hour run consisting of alternate periods of 1½ hours at Maximum Continuous Power and speed and ½ hour at 75% Maximum Continuous Power and 91% Maximum Continuous speed. Part 3 A 20-hour run consisting of alternate periods of 1½ hours at Maximum Continuous Power and speed and ½ hour at 70% Maximum Continuous Power and 89% Maximum Continuous speed. Part 4 A 20-hour run consisting of alternate periods of 1½ hours at Maximum Continuous Power and speed and ½ hour at 65% Maximum Continuous Power and 87% Maximum Continuous speed. Part 5 A 20-hour run consisting of alternate periods of 1½ hours at Maximum Continuous Power and speed and ½ hour at 60% Maximum Continuous Power and 84.5% Maximum Continuous speed. Part 6 A 20-hour run consisting of alternate periods of 1½ hours at Maximum Continuous Power and speed and ½ hour at 50% Maximum Continuous Power and 79.5% Maximum Continuous speed. Part 7 A 20-hour run consisting of alternate 2½ hour periods at Maximum Continuous Power and speed and Maximum Best Economy Cruising Power or Maximum Recommended Cruising Power conditions. (2) Schedule for Engine Incorporating a Gear-driven Two-speed Supercharger. Part 1 A 30-hour run in the lower gear ratio consisting of alternate 5 minute periods at Take-off Power and speed and Maximum Best Economy Cruising Power or Maximum Recommended Cruising Power Conditions. If a Take-off Power rating is desired in the higher gear ratio, 15 hours of the 30-hour run must be made in the higher gear ratio in alternate periods of 5 minutes at the power obtainable with the Take-off Critical Altitude power setting and Take-off speed and 5 minutes at 70% high ratio Maximum Continuous Power and 89% high ratio Maximum Continuous speed. Part 2 A 15-hour run in the lower gear ratio consisting of alternate periods of one hour at Maximum Continuous Power and speed and ½ hour at 75% Maximum Continuous Power and 91% Maximum Continuous speed. Part 3 A 15-hour run in the lower gear ratio consisting of alternate periods of one hour at Maximum Continuous Power and speed and ½ hour at 70% Maximum Continuous Power and 89% Maximum Continuous speed. Part 4 A 30-hour run in the higher gear ratio at Maximum Continuous Power and speed. Part 5 A 5-hour run consisting of alternate periods of 5 minutes in each of the supercharger gear ratios. The first 5 minutes of each 10-minute period must be made in the higher gear ratio at Maximum Continuous speed and the power obtainable with 90% of Maximum Continuous power setting in the higher gear ratio under sea-level conditions. The condition for operation for the following 5-minute period in the lower gear ratio must be that obtained by shifting to the lower gear ratio at constant speed. Part 6 A 10-hour run in the lower gear ratio consisting of alternate periods of one hour at Maximum Continuous Power and speed and one hour at 65% Maximum Continuous Power and 87% Maximum Continuous speed. Part 7 A 10-hour run in the lower gear ratio consisting of alternate periods of one hour at Maximum Continuous Power and speed and one hour at 60% Maximum Continuous Power and 84.5% Maximum Continuous speed. Part 8 A 10-hour run in the lower gear ratio consisting of alternate periods of one hour at Maximum Continuous Power and speed and one hour at 50% Maximum Continuous Power and 79.5% Maximum Continuous speed. Part 9 A 20-hour run in the lower gear ratio consisting of alternate 2-hour periods at Maximum Continuous Power and speed and Maximum Best Economy Cruising Power and speed or at Maximum Recommended Cruising Power and speed. Part 10 A 5-hour run in the lower gear ratio at Maximum Best Economy Cruising Power and speed or Maximum Recommended Cruising Power and speed. (3) *Schedule for Engine Incorporating a**Turbocharger*. (See [AMC E 440(b)(3)](#_DxCrossRefBm1371447713)). For Engines incorporating a turbocharger, the Schedule of CS-E 440(b)(1) will apply, except that – (i) Entire run specified in Part 1 must be made at sea-level pressure, (ii) The portions of the runs specified in Parts 2 to 7 at Maximum Continuous Power must be made at Critical Altitude pressure and the portions of the runs at other powers must be made at 2 500 m altitude pressure, and (iii) The turbocharger used during the 150-hour endurance test must be run on the bench for an additional 50 hours at a representative inlet pressure and at the limiting turbine wheel inlet gas temperature and rotational speed for Maximum Continuous Power operation unless the limiting temperature and speed are maintained during 50 hours of the rated Maximum Continuous Power operation. (c) After completion of the test, the Engine must be subject to a strip inspection, and the dimensions measured in accordance with CS-E 440(a)(6) must be re-measured and recorded. The condition of the Engine must be satisfactory for safe continued operation. Separately functioning Engine components and equipment must be functionally checked prior to strip to ensure that any changes in function or settings are satisfactory for normal operation. [Amdt. No.: E/1]