Document ID: chunk:federal_register_of_legislation:F2021C01280:reg:5:p12
Version: federal_register_of_legislation:F2021C01280
Segment Type: reg
Provision Reference: reg 5 (pt 12/26)
Character Range: 35412–38366

with:
(a) each of the testing procedures set out in clause 2 of Attachment 1 to this Appendix; or
(b) each of the applicable testing procedures of the NAA of a recognised country that is the state of design for the aircraft.
       4.3For an aircraft certificated for single-pilot operations:
(a) the pilot's pressure altimeter must be tested under subclause 4.2; and
(b) any other pressure altimeter that is not tested must be appropriately placarded to that effect.
       4.4The pressure altimeter tests mentioned in subclause 4.2 must be carried out at intervals not exceeding every 24 months.
Note 1   Test errors must not exceed those specified for pressure altimeters in Attachment 1 to this Appendix.
Note 2   Appropriate test equipment may allow pressure altimeter tests to be carried out either while the altimeter is installed on the aircraft, or in a workshop.
       4.5Any air data computer installed in an aircraft must be tested in accordance with the manufacturer's maintenance manual.
Note   Electronic displays do not require testing.

 Automatic altitude reporting equipment correspondence checks
       4.6If any of the following devices are installed in an aircraft:
(a) an automatic pressure altitude encoder;
(b) an air data computer;
(c) any equivalent device reporting directly to air traffic control (ATC) via the aircraft's transponder;
       the device must be tested in accordance with each of the testing procedures set out in clause 3 of Attachment 1 to this Appendix.
Note   Test errors must not exceed those specified in Attachment 1 to this Appendix for the relevant encoders, computers or other devices.
       4.7Subject to subclause 4.8, the automatic pressure altitude encoders mentioned in subclause 4.6 must be tested in conjunction with the aircraft's pressure altimeter tests mentioned in subclause 4.2.
Note   See subclause 4.4 for the interval.
       4.8If the following apply:
(a) an aircraft uses a separate direct reading altimeter for the primary control of altitude;
(b) the aircraft has an automatic altitude reporting system comprising a separate automatic pressure encoder, air data computer, or other equivalent device reporting directly to ATC via the aircraft's transponder;
       then the reporting system must be tested in accordance with subclause 4.6 on each occasion of the removal or the installation of, or a change to, or a modification to:
(c) a system component; or
(d) the system interwiring.

5 Airspeed indicator
       5.1This clause applies to an aircraft's airspeed indicators.
       5.2The airspeed indicator tests, including determination of the scale error of the aircraft's installed airspeed indicator must be determined through testing in accordance with subclause 5.3.
       5.3For subclause 5.2, the scale errors at the major graduations of the scale must not exceed ± 4 knots up to the maximum speed of the aircraft, when tested first with the pressure increasing, and