Commonwealth legislation

AD/FN-333/3 - Inlet Manifold Rear Drain - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

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What this is: A mandatory safety fix for the SIAI Marchetti FN-333 Riviera series aircraft. It is an Airworthiness Directive (AD) — a legally binding order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.

What it requires: Owners or operators must immediately install an external drain line on the rear drain valve of the inlet manifold (the engine component mixing air and fuel). This pipe must carry any leaking fuel clear of the exhaust system.

Why it matters: Without this modification, excess fuel could drip onto the hot exhaust, creating a serious fire hazard. The forward manifold already has this protection; this directive extends it to the rear.

Who must comply: Anyone operating any model of the FN-333 Riviera must complete this modification immediately (the directive uses the term "forthwith").

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AD/FN-333/3 - Inlet Manifold Rear Drain - Modification

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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 SIAI Marchetti FN-333 (Riviera) Series Aeroplanes

AD/FN-333/3 Inlet Manifold Rear Drain - Modification NK

Applicability: All models.

Requirement: Fit an outside drain line to the inlet manifold rear drain valve similar to those fitted to the forward manifold drains. Ensure that this drain line will drain excess fuel clear of the exhaust system.

Compliance: Forthwith.

Source text

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