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AMC E 740(c)(3) Endurance tests

Available versions for ERULES-1963177438-8958

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

Version Text

AMC E 740(c)(3) Endurance tests

ED Decision 2007/015/R

(1) Two procedures for running the tests required under [CS-E 740(c)(3)](#_DxCrossRefBm1371447586) are acceptable:

(a) After the basic 150-hour endurance test the Engine may be subject to a strip inspection in accordance with [CS-E 740(h)(1)](#_DxCrossRefBm1371447586).

The Engine is then reassembled using the same parts used for the 150-hour endurance test except as otherwise allowed by [CS-E 740(h)(2)(ii)](#_DxCrossRefBm1371447586) and the additional 2-hour endurance test is run to [CS-E 740(c)(3)(iii)](#_DxCrossRefBm1371447586).

Completion of the additional 2-hour endurance test would be followed by compliance with the strip inspection specifications of [CS-E 740(h)(2)(iii)](#_DxCrossRefBm1371447586); or

(b) The 2-hour additional endurance test of [CS-E 740(c)(3)(iii)](#_DxCrossRefBm1371447586) may be run immediately after the basic 150-hour endurance test without Engine disassembly.

The strip inspection standards that will be applied after completion of the additional 2-hour endurance test will be those prescribed in [CS-E 740(h)(2)](#_DxCrossRefBm1371447586).

(2) Per [CS-E 50(f)](#_DxCrossRefBm1371447582), the Engine control should prevent exceedence of the speed limitation associated with the 30-Second OEI Power rating. Nevertheless, for ensuring the shortest time of establishment of the corresponding power, it might be necessary to design the Engine control in such a manner that a short overshoot of the speed will occur at the beginning of the 30 seconds period. This is acceptable if this is validated throughout the [CS-E 740(c)(3)(iii)](#_DxCrossRefBm1371447586) test.

(3) In the event of a stop occurring during the four test sequences of [CS-E 740(c)(3)(iii)](#_DxCrossRefBm1371447586), the interrupted sequence needs to be repeated in full or can be re-started from the interrupt point if there is a technical justification acceptable to the Agency. If it is determined that the sequence need not be repeated in its entirety, the test should be restarted from a point where the Engine thermal condition would be the same as at the time of interruption. (See [CS-E 740(b)(1)](#_DxCrossRefBm1371447586)).

[Amdt. No.: E/1]