AMC E 740(h)(2) Endurance tests - Inspection checks

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

AMC E 740(h)(2) Endurance tests - Inspection checks ED Decision 2007/015/R (1) If relevant, the level of Engine disassembly, component cleaning and replacement prior to rebuild for the additional endurance test sequence should be agreed with the Agency (See [CS-E 150(b)](#_DxCrossRefBm1371447671)). It should be shown that any cleaning or replacement of consumable parts during the strip examination or replacement of consumable parts will not enhance the Engine's ability to meet the specifications of the additional endurance test of [CS-E 740(c)(3)(iii)](#_DxCrossRefBm1371447586). (2) For complying with the structural integrity specification of [CS-E 740(h)(2)(iii)](#_DxCrossRefBm1371447586), the applicant should show that no Failure of any significant Engine component occurs during test or during shutdown, or becomes evident during the subsequent strip examination. In the event that any Failure becomes evident, this should be analysed and corrective actions taken, or certain limitations imposed on the Engine as appropriate. For the purpose of this specification, the Engine parts deemed significant are those that can affect the structural integrity, including but not limited to mountings, casings, bearing supports, shafts and rotors. (3) The Engine condition exhibited after the additional endurance test required by [CS-E 740(c)(3)(iii)](#_DxCrossRefBm1371447586) may be used to validate the mandatory maintenance actions after use of 30-Second and 2-Minute OEI ratings as required by [CS-E 25(b)(2)](#_DxCrossRefBm1371447583) and described in the associated AMC material. (4) For components which are distressed beyond serviceable limits during the test of [CS-E 740(c)(3)(iii)](#_DxCrossRefBm1371447586), it should be shown that the inspections and mandatory maintenance actions for these components, as specified in the Instruction for Continued Airworthiness, are adequate. The instructions should include means for proper identification of these component conditions, and appropriately defined maintenance actions. The component deterioration as it affects performance during the test, and the component condition after test, should be determined. The distress seen as a result of the 2-hour test should not create a potentially hazardous condition. In addition to visible physical damage, non-visible damage should be assessed. Such damage may include but not necessarily be limited to the effects of creep, stress rupture, metallurgical effects, life usage, etc. This overall evaluation should then be considered when defining and justifying the inspections and mandatory maintenance actions for instructions for continued airworthiness. [Amdt No: E/1]