Commonwealth legislation

AD/ENST 28/29 - Rotor Head Hub - CANCELLED

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

This Airworthiness Directive (AD)—a type of safety regulation issued by the Civil Aviation Safety Authority (CASA)—cancels previous mandatory inspection rules for Enstrom F-28 helicopter rotor head hubs.

Who it affects: Owners, operators, and maintenance crews of Enstrom F-28 series helicopters.

What it does: It removes a standalone legal requirement to inspect for cracked hub plates under a specific Service Difficulty Bulletin (SDB). Those safety checks are now handled through the standard aircraft Maintenance Manual instead.

Why it matters: It streamlines compliance for operators. CASA determined the special directive was no longer necessary because the manufacturer reported no new cracks since the bulletin was released, and the routine maintenance rules now adequately cover the risk.

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Current sections

Direct links to the current provisions in AD/ENST 28/29 - Rotor Head Hub - CANCELLED.

Enstrom F-28 Series Helicopters

AD/ENST 28/29	Rotor Head Hub	11/2007

Requirement:	CANCELLED.
	This AD is cancelled on 25 October 2007.
Background:	Enstrom have reported no cracked hub plates since the release of the SDB. The SDB was cancelled on 29 March 2007. All periodic inspections of the main rotor hub are contained in the Maintenance Manual.

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Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

14 September 2007

AD/ENST 28/29

Rotor Head Hub

11/2007

Source text

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

Enstrom F-28 Series Helicopters Enstrom F-28 Series Helicopters

Enstrom F-28 Series Helicopters

AD/ENST 28/29	Rotor Head Hub	11/2007

Requirement:	CANCELLED.
	This AD is cancelled on 25 October 2007.
Background:	Enstrom have reported no cracked hub plates since the release of the SDB. The SDB was cancelled on 29 March 2007. All periodic inspections of the main rotor hub are contained in the Maintenance Manual.

AD/ENST 28/29 - Rotor Head Hub - CANCELLED

Plain English Summary

Deep dive

Current sections

Enstrom F-28 Series Helicopters

Enstrom F-28 Series Helicopters

AD/ENST 28/29

AD/ENST 28/29

Rotor Head Hub

Rotor Head Hub

11/2007

11/2007

Source text

Enstrom F-28 Series Helicopters Enstrom F-28 Series Helicopters

Enstrom F-28 Series Helicopters

AD/ENST 28/29 AD/ENST 28/29

AD/ENST 28/29

Rotor Head Hub Rotor Head Hub

Rotor Head Hub

11/2007 11/2007

11/2007