ED Decision 2003/10/RM
1 Applicability
This ETSO gives the requirements which electric tachometers: magnetic drag (indicator and generator) 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 SAE Aerospace Standard (AS) document: AS 404B dated February 1, 1959, and reconfirmed May 1991, as amended and supplemented by this ETSO:
Exceptions.
(i) The following specifically numbered parts in AS-404B do not concern minimum performance and therefore are not essential to compliance with this paragraph: Parts 3.1, 3.1.1, 3.1.2, 3.2, 3.2(a)(b)(c)(d)(e)(f), 4.1.3.1, 4.1.3.2, 4.1.3.3, 4.1.3.4, and 4.1.3.5.
(ii) In lieu of part 7 in AS-404B, it is a requirement that tachometers covered by this paragraph be capable of successfully passing the tests in parts 7.1 through 7.8.
3.1.2 Environmental Standard
As prescribed in AS 404B.
3.1.3 Computer Software
See CS-ETSO Subpart A paragraph 2.2
3.2 Specific
None.
4 Marking
4.1 General
Marking is detailed in CS-ETSO Subpart A paragraph 1.2; in addition, range and rating shall be shown.
4.2 Specific
None.
5 Availability of Referenced Document
See CS-ETSO Subpart A paragraph 3.
ETSO-C49b requires magnetic drag electric tachometers manufactured on or after its date to meet SAE AS-404B minimum performance and environmental standards, with specific exceptions and additional range and rating marks.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
Loading collections...