Document ID: chunk:federal_register_of_legislation:F2021C01280:reg:5:p22
Version: federal_register_of_legislation:F2021C01280
Segment Type: reg
Provision Reference: reg 5 (pt 22/26)
Character Range: 61450–64324

same row, are not exceeded:

Checks required at (in degrees)  Maximum permissible residual error
(Column 1)                       (Column 2)
0° and ±15°                      ±5°
180° and ±15°                    ±5°
Any other bearing                ±6°

Checks — dual ADF systems
       18.4Where there are any dual ADF systems — check and ensure that each system does not interfere with the operation of the other system.

Intervals
       18.5The checks mentioned in this clause must be carried out each time a periodic inspection is carried out in accordance with paragraphs 2.4 and 2.5 in Part 2 of Schedule 5 of CAR.

19 VOR systems — periodic checking

Application
       19.1This clause applies only for the following navigation systems (the relevant systems) of an Australian aircraft engaged in I.F.R. flight for which the holder of the certificate of registration has elected to use the CASA maintenance schedule:
(a) all VOR systems;
(b) all localiser systems;
(c) all glideslope systems.
Note   The CASA maintenance schedule is set out in Schedule 5 — CASA maintenance schedule, of CAR.

Checks
       19.2Check and ensure that the level of interference between the relevant systems, and any combination of other aircraft systems normally operated in flight, is not of a level sufficient to cause either of the following:
(a) a significant deflection of the flight path indicator when the flag is concealed;
(b) any degradation of the readability of the station identification.
       19.3For subclause 19.2, a level of interference which is merely intermittent or short-term may be ignored, but only if it does not cause the deflection or degradation mentioned in paragraphs 19.2 (a) and (b).
       19.4Check and ensure that the level of interference from any source, intermittent, short‑term or otherwise, is not of a level sufficient to cause the flag to indicate usability in the absence of a usable signal.

Intervals
       19.5The checks mentioned in this clause must be carried out each time a periodic inspection is carried out in accordance with paragraphs 2.4 and 2.5 in Part 2 of Schedule 5 of CAR.

20 VOR in I.F.R. — periodic checking

Application
       20.1This clause applies only for the following navigation system of an Australian aircraft for which the holder of the certificate of registration has elected to use the CASA maintenance schedule: a VOR system installed in an aircraft equipped for flight under the I.F.R.
Note   The CASA maintenance schedule is set out in Schedule 5 — CASA maintenance schedule, of CAR.

Checks
       20.2Check and ensure that each of the following requirements is the case:
(a) based on tests made on a representative number of radials, the deviation indicator must centre when the omni bearing selector (OBS) is within 3 degrees of the selected radial;
(b) the deflection sensitivity must be such that a 5