ETSO-C7d

DIRECTION INSTRUMENT, MAGNETIC NON-STABILIZED TYPE (MAGNETIC COMPASS)

1 Applicability

This ETSO gives the requirements which new models of direction instruments, magnetic nonstabilized type (magnetic compass) 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 398A 'Direction Instrument, Magnetic Non -Stabilized Type (Magnetic Compass)', dated July 15, 1958 'reaffirmed October 1984' (if TSO) except as amended and supplemented by this ETSO:

- (i) Conformance with the following paragraphs of AS 398A is not required: 3.1; 3.1.1; 3.1.2; 3.2. - (ii) Substitute the following for paragraph 7 of AS 398A:

'Performance tests: the following tests in addition to any others deemed necessary by the manufacturers, shall be the basis for determining compliance with the performance requirements of this standard.'

3.1.2 Environmental Standard

The environmental conditions and test procedures in SAE AS 398A are to be used.

3.1.3 Computer Software

None

- 3.2 Specific

None

4 Marking

- 4.1 General

Marking is detailed in CS-ETSO Subpart A.

- 4.2 Specific

None.

5 Availability of Referenced Document

See CS-ETSO Subpart A paragraph 3.