AD/LEARJET 35/10 - Cabin Altitude Pressure Limiter - Installation

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Legislation au F2006B11088 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

 


Gates Learjet 35 and 36 Series Aeroplanes

 

AD/LEARJET 35/10 Cabin Altitude Pressure Limiter - Installation 1/79

Applicability: Model 35 with S/Nos. 35-001 to 35-112 except S/No. 35-107;

 

Model 36 with S/Nos. 36-001 to 36-031.

 

Document: Learjet Airplane Mod. Kit AMK 78-5.

 

Compliance: Within 600 hours time in service after 31 January 1979.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Overview

The Civil Aviation Safety Authority (CASA) issued the Civil Aviation Regulations 1998 to establish a comprehensive framework governing all aspects of civil aviation in Australia. This legislation was enacted by the Parliament of Australia and is aimed at ensuring the safety and efficiency of civil aviation operations within the country. One specific area of focus is the regulation of airworthiness directives, which are intended to address safety issues and ensure that aircraft are maintained in a safe and airworthy condition. This includes the requirement for the installation of a cabin altitude pressure limiter in Gates Learjet 35 and 36 series aeroplanes, as specified in AD/LEARJET 35/10. The policy objective of this directive is to mitigate risks associated with cabin altitude pressure, thereby enhancing the overall safety of these aircraft types. The Civil Aviation Regulations 1998 were introduced to address gaps in the regulation of civil aviation activities and to provide a unified legislative framework that ensures safety and efficiency in the sector. By mandating specific maintenance and operational standards through airworthiness directives, such as the installation of cabin altitude pressure limiters, CASA aims to proactively manage safety risks and maintain high standards of airworthiness. This legislation underscores the importance of continuous oversight and the implementation of safety measures to protect passengers, crew, and the general public.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 – 105, applies to the Gates Learjet 35 and 36 series aeroplanes, with a focus on the installation of a Cabin Altitude Pressure Limiter as stipulated in Airworthiness Directive AD/LEARJET 35/10. This directive applies to specific serial numbers within the Learjet 35 and 36 models, namely from 35-001 to 35-112 (excluding 35-107) for Model 35, and from 36-001 to 36-031 for Model 36. Compliance with this directive is mandatory and must be achieved within 600 hours of time in service after 31 January 1979, as outlined in Learjet Airplane Modification Kit AMK 78-5. This legislation is enforced by the Civil Aviation Safety Authority and has a national jurisdictional reach across Australia, ensuring that all relevant aircraft meet the specified safety standards.

Key Provisions

The main operative sections of the AD/LEARJET 35/10 (section 1/79) mandate the installation of a cabin altitude pressure limiter in specific Gates Learjet 35 and 36 series aeroplanes. The affected models include the Learjet 35 with serial numbers ranging from 35-001 to 35-112, excluding serial number 35-107, and the Learjet 36 with serial numbers from 36-001 to 36-031. Compliance with this directive requires the installation of the Learjet Airplane Modification Kit (AMK) 78-5. The directive specifies that this modification must be completed within 600 hours of time in service after 31 January 1979. The obligations and requirements imposed by this Act include ensuring that the specified modifications are carried out by authorised personnel using the approved modification kit. Operators of the affected aircraft must ensure that the cabin altitude pressure limiter is installed as per the directives outlined in the AMK 78-5 document. This requirement is critical for maintaining the airworthiness of the aircraft and ensuring the safety of passengers and crew. The regulations also mandate that operators maintain records of the modification and ensure that the aircraft is fit for continued operation. Failure to comply with the provisions of this directive can result in severe consequences. The Act does not specify particular offences or penalties within the provided text, but non-compliance with airworthiness directives can generally lead to significant regulatory actions. These may include the grounding of the aircraft, potential prosecution, and financial penalties. In extreme cases, operators may face revocation of their operating certificate. It is imperative for operators to adhere to the deadlines and standards set forth in the directive to avoid any legal or safety repercussions.

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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.