When must a maximum allowable airspeed indicator system meet the requirements of ETSO-C46a to be identified with the applicable ETSO marking?

The system must meet the requirements if it is manufactured on or after the date of this ETSO.

Are there any specific procedures or specific technical conditions in ETSO-C46a?

No, there are none. The specific procedures and specific technical conditions sections state 'None'.

What is the applicability of ETSO-C46a regarding computer software?

There is no computer software requirement; the Computer Software section states 'None'.

ETSO-C46a

Q: What marking must be added to a maximum allowable airspeed indicator system in addition to the markings required by CS-ETSO Subpart A paragraph 1.2?

The instrument must be marked to indicate its range in knots and, if applicable, to identify the calibration employed to control the movement of the maximum allowable airspeed pointer in the Vmo and Mmo ranges, or to identify the particular aircraft type design on which the instrument is intended to be used.

Q: Which SAE standards may be used to show compliance with the related standards in ETSO-C46a, and what condition applies to their environmental or other limits?

SAE AS 418A dated May 15, 1961, 'Maximum Allowable Airspeed Instrument, Reciprocating Engine Powered Aircraft', or SAE AS 437 dated April 15, 1963, 'Maximum Allowable Airspeed Instrument, Turbine Powered Aircraft', may be used. However, environmental limits, or other limits, specified in these procedures must be adjusted if necessary to agree with those specified in this ETSO.

Q: What is the minimum performance standard for maximum allowable airspeed indicator systems under ETSO-C46a?

The standards set forth in the attached 'Federal Aviation Administration Standard, Maximum Allowable Airspeed Indicator Systems' as amended and supplemented by this ETSO.

Q: What is the environmental standard for maximum allowable airspeed indicator systems under ETSO-C46a?

As stated in the 'Federal Aviation Administration Standard, Maximum Allowable Airspeed Indicator Systems'.

Q: When using the referenced FAA documents/paragraphs in ETSO-C46a, what must be used instead where applicable?

The corresponding IR, CS or ETSO document/paragraph shall be used, when available.

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ETSO-C46a

ED Decision 2003/10/RM

Maximum Allowable Airspeed Indicator Systems

1 Applicability

This ETSO gives the requirements which maximum allowable airspeed indicator systems that are manufactured on or after the date of this ETSO must meet in order to be identified with the applicable ETSO marking.

2 Procedures

2.1 General

Applicable procedures are detailed in CS-ETSO Subpart A.

2.2 Specific

None.

3 Technical Conditions

3.1 Basic

3.1.1 Minimum Performance Standard

Standards set forth in the attached „Federal Aviation Administration Standard, Maximum Allowable Airspeed Indicator Systems“ as amended and supplemented by this ETSO:

a. Tests procedures set forth in Society of Automotive Engineers (SAE) Aeronautical Standard (AS) 418A dated May 15, 1961, „Maximum Allowable Airspeed Instrument, Reciprocating Engine Powered Aircraft“, or SAE AS 437 dated April 15, 1963, „Maximum Allowable Airspeed Instrument, Turbine Powered Aircraft“, may be used for the purpose of showing compliance with related standards in this ETSO. However, environmental limits, or other limits, specified in these procedures must be adjusted if necessary to agree with those specified in this ETSO.

b. Other test procedure may also be adequate and valid for the purpose.

c. Where applicable, instead of the referenced FAA documents/paragraph the corresponding IR, CS or ETSO document/paragraph shall be used, when available.

3.1.2 Environmental Standard

As stated in the „Federal Aviation Administration Standard, Maximum Allowable Airspeed Indicator Systems“.

3.1.3 Computer Software

None

3.2 Specific

None.

4 Marking

4.1 General

Marking is detailed in CS-ETSO Subpart A paragraph 1.2; in addition to the markings required by this paragraph, the instrument must be marked to indicate its range in knots and, if applicable, to identify the calibration employed to control the movement of the maximum allowable airspeed pointer in the Vmo and Mmo ranges, or to identify the particular aircraft type design on which the instrument is intended to be used.

4.2 Specific

None.

5 Availability of Referenced Document

See CS-ETSO Subpart A paragraph 3.

Details

Source-Title: ETSO-C46a View latest amendments

Erulesid: ERULES-1963177438-7165 Compare versions

Domain: Initial airworthiness

Amendedby: Initial issue

Applicabilitydate: 24 October, 2003

Entryintoforcedate: 24 October, 2003

Regulatorysource: ED Decision 2003/10/RM Navigate

Regulatorysubject: CS-ETSO

Typeofcontent: CS (Certification specification)

Origin: EASA

Category: EAR

ETSO-C46a

Maximum Allowable Airspeed Indicator Systems

Details

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