Commonwealth legislation

AD/RAD/22 - Press-to-Talk Assembly - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

1/10 complexity

What this is: An aviation safety rule (called an Airworthiness Directive) that mandates a specific fix for a radio part in aircraft.

The problem: The Aerosound 555-900 Press-to-Talk Assembly (the button pilots press to speak over the radio) has a fault where the transmitter can stay switched on even after the pilot releases the button. This creates a "stuck mic" situation that blocks the radio frequency and prevents other pilots from communicating.

Who must act: Aircraft owners or operators with this specific radio part installed.

What must be done: Modify the assembly so the transmitter reliably switches off when the button is released. The modification must follow the technical specification AC-M-1004 from Air Communications Pty. Ltd.

Deadline: The work had to be completed before 1 April 1971 (this is a historical directive).

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AD/RAD/22 - Press-to-Talk Assembly - Modification

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Radio Communication and Navigation Equipment

AD/RAD/22 Press-to-Talk Assembly - Modification 2/71

Applicability: Aerosound 555-900 Press-to-Talk Assembly.

Requirement: Modify the Press-to-Talk Assembly to ensure that a transmitter will not remain energised after the Press-to-Talk button is released.

Note: Incorporation of Air Communications Pty. Ltd. modification specification. AC- M-1004 is an acceptable means of compliance.

Compliance: Before 1 April 1971.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.