Commonwealth legislation

AD/AT/4 - Rudder Hinges - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

2/10 complexity

What this is: A mandatory safety inspection order (called an Airworthiness Directive) for specific agricultural aircraft.

Who it affects: Owners and operators of Air Tractor AT-300, AT-301, and AT-302 aeroplanes with serial numbers 0001 through 0260.

What you must do:

Inspect the rudder hinges for corrosion damage within 100 flight hours after 31 July 1983
Repeat this inspection at least once every year thereafter

Why this matters: The aircraft manufacturer reported a case where a rudder hinge failed because the metal tube inside the rudder had corroded (rusted). If this happens in flight, the pilot could lose control of the aircraft's steering, potentially causing a crash. This rule forces operators to check for this hidden corrosion before it causes catastrophic failure.

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Direct links to the current provisions in AD/AT/4 - Rudder Hinges - Inspection.

AD/AT/4 - Rudder Hinges - Inspection

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Airtractor AT-300, 400 and 500 Series Aeroplanes

AD/AT/4	Rudder Hinges - Inspection	7/83
Applicability:	All models AT-300, AT-301 and AT-302 with S/Nos. 0001 to 0260.
Document:	Snow Engineering Co. Service Letter No. 48.

Compliance: Within 100 hours time in service after 31st July 1983 and thereafter at intervals not exceeding 1 year.

Background: The manufacturer reports a case of a rudder hinge failure due to corrosion of the rudder spar tube.

Source text

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