ETSO-C135a

Large Aeroplane Wheels and Wheel and Brake Assemblies

1 Applicability

This ETSO prescribes the minimum performance standard that large aeroplane wheels, and wheel and brake assemblies must meet to be identified with the applicable ETSO marking. Brakes and associated wheels are to be considered as an assembly for ETSO authorisation purposes.

2 Procedures

2.1 General

Applicable procedures are detailed in CS-ETSO Subpart A.

2.2 Specific

2.2.1 Data Requirements.

2.2.1.1 In addition to the data specified in CS-ETSO Subpart A, the manufacturer must furnish one copy each of the following to the Agency:

2.2.1.2 The applicable limitations pertaining to installation of wheels or wheel and brake assemblies on aeroplane(s), including the data requirements of paragraph 4.1 of Appendix 1 or Appendix 2 of this ETSO.

2.2.1.3 The manufacturer’s ETSO qualification test report.

2.2.2 Data to be Furnished with Manufactured Articles.

2.2.2.1 Prior to entry into service use, the manufacturer must make available to the Agency all applicable maintenance instructions and data necessary for continued airworthiness.

2.2.2.2 The manufacturer must provide the applicable maintenance instructions and data necessary for continued airworthiness to each organisation or person receiving one or more articles manufactured under this ETSO. In addition, a note with the following statement must be included:

“The existence of ETSO approval of the article displaying the required marking does not automatically constitute the authority to install and use the article on an aeroplane. The conditions and tests required for ETSO approval of this article are minimum performance standards. It is the responsibility of those desiring to install this article either on or within a specific type or class of aeroplane to determine that the aeroplane operating conditions are within the ETSO standards. The article may be installed only if further evaluation by the user/installer documents an acceptable installation and the installation is approved by the Agency.

Additional requirements may be imposed based on aeroplane specifications, wheel and brake design, and quality control specifications. In-service maintenance, modifications, and use of replacement components must be in compliance with the performance standards of this ETSO, as well as any additional specific aeroplane requirements.”

3 Technical Conditions

3.1 Basic

3.1.1 Minimum Performance Standard

3.1.1.1 Hydraulically actuated brakes and wheels

Standards set forth in Appendix 1.

3.1.1.2 Electrically actuated brakes and wheels

Standards set forth in Appendix 2 for the brakes plus the applicable requirements of Appendix 1 for the wheels.

3.1.2 Environmental Standard

None.

3.1.3 Computer Software

None

3.2 Specific

None

4 Marking

4.1 General

In addition to the marking specified in CS-ETSO Subpart A paragraph 1.2; the following information shall be legibly and permanently marked on the major equipment components:

(i) Size (this marking applies to wheels only).

(ii) Hydraulic fluid type (this marking applies to hydraulic brakes only).

(iii) Serial Number.

4.1.1 All stamped, etched, or embossed markings must be located in non-critical areas.

4.2 Specific

None.

5 Availability of Referenced Document

See CS-ETSO Subpart A paragraph 3.

[Amdt ETSO/6]