Civil Aviation Order 100.5 (General requirements in respect of maintenance of Australian aircraft) 2011
18ADF systems — periodic checking
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18 ADF systems — periodic checking
18.1This clause applies only for the ADF navigation 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.
Checks — quadrantal errors
18.2Each ADF navigation system must be checked for accuracy and correct performance in all modes of operation for quadrantal errors.
18.3The following must be done:
(a) apply corrections for any quadrantal errors detected;
(b) after the application of corrections for any quadrantal errors, ensure that the maximum permissible residual error mentioned in a row of column 2 of the following table, for a check mentioned in column 1 of the same row, are not exceeded:
| Checks required at (in degrees)(Column 1) | Maximum permissible residual error(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.
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.