What alternate methods does EASA accept as deviations from ETSO-C16b for pitot and pitot-static probes?

EASA accepts the following alternate means as deviations from this ETSO: modified test conditions for ED-225 sections 1.2 and 2.2; scaling method not listed in section 2.3; MMD value outside the specified range for Table 5; and MVD value outside the specified range for Table 6.

How are Class 2 probes subdivided and what are the testing requirements for each subgroup?

Class 2 is divided into two subgroups: Class 2a and Class 2b. Class 2a probes typically operate within the mid to lower end of the Class 2 altitude range and only display basic airspeed and/or altitude, so they do not have to be tested against ice crystals at an altitude-capable icing tunnel. Class 2b applications are for probe installations intended to serve a critical function and shall be tested at an altitude-capable icing tunnel. Probes qualified to Class 2 shall be identified as either Class 2a or Class 2b.

What does the EASA modification to ED-225 section 1.6 add regarding the words 'shall' and 'must'?

The modification adds subsection 1.6 General Definitions stating that the words 'shall' and 'must' are used to express an essential requirement where compliance is mandatory.

What note is added to ED-225 paragraph 3.5 regarding probe test voltage reported to the installer?

The note states that the probe test voltage reported to the installer shall not include any voltage adjustments made per paragraph 3.9 to simulate worst-case heater performance.

What is the applicability date of the amendment to ETSO-C16b?

The section does not state an applicability date on or after 2026-10-01; therefore, no applicability date is provided.

Appendix 2 to ETSO-C16b - Ice and Rain Minimum Qualification Standards for Pitot and Pitot-Static Probes

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Appendix 2 to ETSO-C16b – Ice and Rain Minimum Qualification Standards for Pitot and Pitot-Static Probes

ED Decision 2018/002/R

ED-225 introduces the possibility to use alternate methods. EASA considers the following alternate means as deviations from this ETSO:

ED-225 Section	Alternate method
1.2	Modified test conditions
2.2	Modified test conditions
2.3	Scaling method not listed in section 2.3
Table 5	MMD value outside the specified range
Table 6	MVD value outside the specified range

In addition, this ETSO modifies EUROCAE ED-225, as follows:

ED-225 Section	EASA Modification
1.2	Page 1: Replace the first ‘NOTE’ with the following: NOTE: Class 2 is divided into two subgroups identified as either Class 2a or Class 2b. Class 2a probe applications typically include aircraft that operate within the mid to lower end of the Class 2 altitude range and that only use probe outputs to display basic airspeed and/or altitude. As such, Class 2a probes do not have to be tested against ice crystals at an altitude-capable icing tunnel. Class 2b applications are for probe installations intended to serve a critical function and shall be tested at an altitude-capable icing tunnel. Probes qualified to Class 2 of this standard shall be identified as either Class 2a or Class 2b.
1.2	Replace the second ‘NOTE’ with the following: NOTE: This specification, when used in conjunction with AS8006A, provides a comprehensive design and test standard for the devices that fall within the scope of this document.
1.6	Page 3: Add subsection 1.6 1.6 General Definitions SHALL: The word ‘shall’ is used in this document to express an essential requirement where compliance is mandatory. MUST: The word ‘must’ is used in this document to express an essential requirement where compliance is mandatory.
3.5	Page 8, Paragraph 3.5 add the following note: NOTE: The probe test voltage reported to the installer shall not include any voltage adjustments made per paragraph 3.9 to simulate worst-case heater performance.

[Amdt ETSO/13]

Details

Source-Title: Appendix 2 to ETSO-C16b - Ice and Rain Minimum Qualification Standards for Pitot and Pitot-Static Probes View latest amendments

Erulesid: ERULES-1963177438-9279 Compare versions

Domain: Initial airworthiness

Amendedby: Amendment 13

Applicabilitydate: 20 February, 2018

Entryintoforcedate: 20 February, 2018

Regulatorysource: ED Decision 2018/002/R Navigate

Regulatorysubject: CS-ETSO

Typeofcontent: CS (Certification specification)

Parentir: ETSO-C16b

Origin: EASA

Category: EAR