Airservices Australia will this week begin essential works on the instrument landing system (ILS) at Perth Airport.
The essential works will include the replacement of the localiser antenna arrays at each end of the main runway (Runway 03/21).
During the works the ILS will need to be removed from service. Pilots will be able to make use of other navigation aids, including VHF omni-directional range and area navigation (RNAV) procedures.
The ILSs at Perth Airport are two of 23 instrument landing systems used nationally for precision approaches at Australian airports.
The replacement of the localisers will ensure the ongoing safe operation of the ILS and minimise the likelihood of any uncontrolled or extended outages in the future.
The system is expected to be brought back into service by early November.