Commonwealth legislation

AD/PDH/1 - Model 3/1000/2 - Hub 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

2/10 complexity

What this is: An Airworthiness Directive — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.

What it requires: If you own, operate, or maintain a De Havilland Dove aircraft fitted with a Model 3/1000/2 variable-pitch propeller, you must replace any single-piece propeller hub with a two-piece hub before installing it on an aircraft.

Who it affects:

Aircraft operators flying De Havilland Dove aircraft
Licensed aircraft maintenance engineers
Owners of these specific propellers

Why it matters: The original single-piece hub design has a safety defect. This directive prevents unsafe propellers from being fitted to aircraft by mandating a design change to the hub assembly.

How to comply: You have two options:

Replace all single-piece hubs with two-piece hubs; or
Follow the alternative technical standard ANO 107.1.4.5.5.1 (an older airworthiness notice)

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Current sections

Direct links to the current provisions in AD/PDH/1 - Model 3/1000/2 - Hub Modification.

AD/PDH/1 - Model 3/1000/2 - Hub 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 Propellers - Variable Pitch - De Havilland

AD/PDH/1 Model 3/1000/2 - Hub Modification NK

Applicability: All model 3/1000/2 propellers fitted to Dove aircraft.

Document: 1. Replace all single piece propeller hubs with two piece type hubs; or 2. ANO 107.1.4.5.5.1.

Compliance: Before installation in an aircraft.

Source text

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