Commonwealth legislation

AD/PA-22/18 - Horizontal Stabiliser Trim Control Screw Mechanism - Stop Installation

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This Act has been repealed and is no longer in force. It is retained for historical reference.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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This Airworthiness Directive (AD) is a mandatory safety order for Piper PA-22 Tri-Pacer and Colt aircraft.

What it requires: Owners must install a physical stop on the horizontal stabiliser trim control screw mechanism. This prevents the yoke assembly (part number 42692-00) from jamming against a pulley (part number 12982-00) when the trim is wound to the extreme nose-down position.

Who is affected: All models of the Piper PA-22 series.

How to comply: The modification must be carried out immediately ("forthwith"). Operators may use W.E. James Aircraft Pty. Ltd. Drawing No. WEJ-65 as an approved method to complete the work.

Why it matters: This prevents a mechanical binding failure in the trim system that could compromise aircraft control, ensuring the horizontal stabiliser operates safely throughout its full range of movement.

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AD/PA-22/18 - Horizontal Stabiliser Trim Control Screw Mechanism - Stop Installation

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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 Piper PA-22 (Tri-Pacer and Colt) Series Aeroplanes

AD/PA-22/18 Horizontal Stabiliser Trim Control Screw Mechanism - Stop Installation

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Applicability: All models.

Requirement: Modify the horizontal stabiliser trim control screw mechanism by installing a stop to prevent the yoke assembly (P/N 42692-00) from binding against the pulley (P/N 12982-00) when the mechanism is wound to the extreme nose-down position.

Note: W.E. James Aircraft Pty. Ltd. Drawing No. WEJ-65 covers an approved means of compliance.

Compliance: Forthwith.

Source text

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