For which auxiliary power units is compliance with the cooling requirements not required to be shown by flight tests?

Compliance with sub-paragraphs (a) and (b) must be shown by flight tests except for ground-use-only auxiliary power units.

After what event must the cooling provisions still maintain temperatures within limits, in addition to normal operating conditions?

The cooling provisions must maintain temperatures within limits after normal engine or auxiliary power shut-down, or both.

Does CS 29.1041 require cooling provisions to maintain temperatures after a normal engine shut-down?

Yes, the cooling provisions must be able to maintain temperatures within limits after normal engine or auxiliary power shut-down, or both.

Are there any exceptions to the requirement to show compliance by flight tests?

Yes, ground-use-only auxiliary power units are excepted from the requirement to show compliance by flight tests.

What must be maintained within safe values for any power transmission under critical surface and flight conditions?

The fluid temperatures in any power transmission must be maintained within safe values under any critical surface (ground or water) and flight operating conditions.

CS 29.1041 General

Q: What must the powerplant and auxiliary power unit cooling provisions be able to maintain under ground, water, and flight operating conditions for which certification is requested?

The cooling provisions must be able to maintain the temperatures of powerplant components, engine fluids, and auxiliary power unit components and fluids within the temperature limits established for these components and fluids, under ground, water, and flight operating conditions for which certification is requested, and after normal engine or auxiliary power shut-down, or both.

Q: Under what conditions must cooling provisions maintain fluid temperatures in any power transmission within safe values?

Cooling provisions must maintain the fluid temperatures in any power transmission within safe values under any critical surface (ground or water) and flight operating conditions.

Q: How must compliance with the cooling requirements of CS 29.1041(a) and (b) be demonstrated?

Compliance must be shown by flight tests in which the temperatures of selected powerplant component and auxiliary power unit component, engine, and transmission fluids are obtained under the conditions prescribed in those paragraphs, except for ground-use-only auxiliary power units.

Q: What specific temperatures must be obtained during the flight tests required for compliance with CS 29.1041?

The flight tests must obtain the temperatures of selected powerplant component and auxiliary power unit component, engine, and transmission fluids under the conditions prescribed in sub-paragraphs (a) and (b).

Q: What is the scope of operating conditions for which the powerplant and auxiliary power unit cooling provisions must maintain temperatures?

The scope includes ground, water, and flight operating conditions for which certification is requested, and after normal engine or auxiliary power shut-down, or both.

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CS 29.1041 General

ED Decision 2003/16/RM

(a) The powerplant and auxiliary power unit cooling provisions must be able to maintain the temperatures of powerplant components, engine fluids, and auxiliary power unit components and fluids within the temperature limits established for these components and fluids, under ground, water, and flight operating conditions for which certification is requested, and after normal engine or auxiliary power shut-down, or both.

(b) There must be cooling provisions to maintain the fluid temperatures in any power transmission within safe values under any critical surface (ground or water) and flight operating conditions.

(c) Except for ground-use-only auxiliary power units, compliance with sub-paragraphs (a) and (b) must be shown by flight tests in which the temperatures of selected powerplant component and auxiliary power unit component, engine, and transmission fluids are obtained under the conditions prescribed in those paragraphs.

Details

Source-Title: CS 29.1041 General View latest amendments

Erulesid: ERULES-1963177438-5475 Compare versions

Domain: Initial airworthiness

Amendedby: Initial issue

Applicabilitydate: 14 November, 2003

Entryintoforcedate: 14 November, 2003

Regulatorysource: ED Decision 2003/16/RM Navigate

Regulatorysubject: CS-29

Typeofcontent: CS (Certification specification)

Origin: EASA

Category: EAR