AD/ENST 28/25 - Clutch Engagement Over Centre Lock Warning Light

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Legislation au F2006B09581 In force Legislative Instrument

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 


Enstrom F-28 Series Helicopters

 

AD/ENST 28/25 Clutch Engagement Over Centre

Lock Warning Light Applicability: All models F-28A, 280, F-28C, 280C, F-28F and 280F helicopters. Document:               Document SDB No. 0061.

FAA AD 82-24-01 refers.

 

Compliance: Within 100 hours time in service after 31 March 1983.


1/83

 

Background:  To ensure that the clutch engaging mechanism is locked and over centre, a warning light indicator is installed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Overview

The Civil Aviation Regulations 1998, amended through F2006B09581, address the need for stringent safety standards in the operation of civil aircraft in Australia. Enacted by the Commonwealth of Australia, this legislation aims to ensure the safety of air travel by imposing specific requirements on aircraft maintenance and operational procedures. The policy objective is to mitigate the risks associated with aircraft operations by enforcing compliance with Airworthiness Directives, such as AD/ENST 28/25 which mandates the installation of a clutch engagement over centre lock warning light for Enstrom F-28 Series Helicopters. This directive ensures that all models F-28A, 280, F-28C, 280C, F-28F and 280F helicopters comply with safety standards within 100 hours of time in service after 31 March 1983. By setting such specific safety requirements, the regulations aim to prevent mechanical failures and enhance the overall safety of civil aviation in Australia.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 – 105 and the Civil Aviation Safety Authority Schedule of Airworthiness Directives, specifically addresses the Enstrom F-28 Series Helicopters, covering models F-28A, 280, F-28C, 280C, F-28F and 280F. This legislation mandates the installation of a warning light indicator to ensure the clutch engaging mechanism is properly locked and over centre, as referenced in FAA AD 82-24-01. Compliance with these regulations is required within 100 hours of time in service after 31 March 1983, ensuring the ongoing safety and airworthiness of these helicopter models. This directive applies nationally across Australia, overseen by the Civil Aviation Safety Authority, and does not specify any exclusions or exemptions within the provided text. The application and enforcement of these regulations may be further detailed in subordinate instruments.

Key Provisions

The main sections of the Civil Aviation Regulations 1998 (CAR) pertaining to the Enstrom F-28 Series Helicopters, as outlined in AD/ENST 28/25, require specific modifications and compliance to ensure safety. Section 39-105 of the CAR mandates that all models F-28A, 280, F-28C, 280C, F-28F and 280F helicopters must comply with the Airworthiness Directive issued, which involves installing a warning light to indicate when the clutch engaging mechanism is locked and over centre. This compliance must be achieved within 100 hours of time in service after 31 March 1983. The obligations imposed by the Act on the parties or entities it governs include ensuring that the specified modifications are carried out by certified personnel, maintaining records of compliance, and ensuring that the aircraft remains airworthy. Specifically, operators and owners of the affected Enstrom F-28 Series helicopters are required to install the warning light as specified in the directive and ensure it is functioning correctly before continuing operations. The modifications must be documented and signed off by an authorised person to demonstrate compliance with the regulations. The consequences for non-compliance with the provisions of AD/ENST 28/25 are significant. Under the CAR, failure to adhere to Airworthiness Directives can result in the aircraft being deemed unairworthy, leading to potential grounding of the helicopter. Additionally, civil penalties may be imposed, which can include fines up to a certain amount. Criminal penalties may also apply, particularly if the non-compliance results in harm or endangerment of passengers or crew. The maximum penalties for serious violations can include substantial fines and imprisonment, depending on the severity of the breach and its impact on safety.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.