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

• ED Decision 2018/002/R found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

###### 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: <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>ED-225 Section</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Alternate method</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 1.2</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Modified test conditions</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 2.2</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Modified test conditions</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 2.3</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Scaling method not listed in section 2.3</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Table 5</p> </td> <td bgcolor="#d9d9d9"><p align="left"> MMD value outside the specified range</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Table 6</p> </td> <td bgcolor="#d9d9d9"><p align="left"> MVD value outside the specified range</p> </td> </tr> </table> In addition, this ETSO modifies EUROCAE ED-225, as follows: <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>ED-225 Section</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>EASA Modification</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 1.2</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Page 1: Replace the first ‘NOTE’ with the following:</p> <p align="left">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.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 1.2</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Replace the second ‘NOTE’ with the following:</p> <p align="left">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.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 1.6</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Page 3: Add subsection 1.6</p> <p align="left"> 1.6 General Definitions</p> <p align="left"> SHALL: The word ‘shall’ is used in this document to express an essential requirement where compliance is mandatory.</p> <p align="left">MUST: The word ‘must’ is used in this document to express an essential requirement where compliance is mandatory.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 3.5</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Page 8, Paragraph 3.5 add the following note:</p> <p align="left">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.</p> </td> </tr> </table> [Amdt ETSO/13]