COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AMD Falcon 50 and 900 Series Aeroplanes
AD/AMD 50/4 Thrust Reverser Electrical Control System 2/90
Applicability: All Falcon 900 aircraft.
Requirement: Action in accordance with Avions Marcel Dassault - Breguet. Aviation Service Bulletin AMD-BA/F900/54 R2.
Note: DGAC Airworthiness Directive 89-106-008 (B) R1 also refers.
Compliance: Prior to 22 May 1990.
Background: AMDBA advise that during landing with the thrust reverser doors ordered deployed, an automatic stow signal will be generated if a landing rebound occurs. This can cause abnormal loads on the door actuating linkages by allowing thrust to be applied to the doors whilst in stowage transit.
This AD requires modification of the thrust reverser electrical control system in order to maintain the doors open when ordered deployed on the ground.
Overview
The Civil Aviation Regulations 1998, amended by the Legislative instrument F2006B02400, address a specific safety concern related to the operation of Falcon 50 and 900 series aeroplanes. Enacted by the Commonwealth of Australia, the regulations are administered by the Civil Aviation Safety Authority and are designed to ensure that aircraft meet stringent safety standards. This particular amendment, AD/AMD 50/4, was introduced to address a problem identified in the thrust reverser electrical control system of Falcon 900 aircraft, where a malfunction could lead to abnormal loads on the door actuating linkages during landing, potentially compromising the safety of the aircraft and its occupants. The policy objective is to ensure compliance with safety standards by mandating modifications to the electrical control system as specified by the relevant aviation service bulletins and directives.
The legislation aims to ensure that all Falcon 900 aircraft conform to the required safety standards by implementing the specified modifications before a specified compliance date, in this case, prior to 22 May 1990. This directive aligns with international safety directives and service bulletins, such as those issued by the DGAC, to maintain uniformity and effectiveness in addressing potential safety hazards. By mandating these changes, the Civil Aviation Regulations 1998 aim to mitigate risks associated with the operation of the thrust reverser system, thereby enhancing the overall safety of air travel.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning Airworthiness Directives, apply to all Falcon 900 aircraft operated within the Commonwealth of Australia. The regulations are designed to ensure the safety of civil aviation operations by imposing mandatory requirements on aircraft operators and owners to comply with certain standards and directives issued by the Civil Aviation Safety Authority. This particular directive, AD/AMD 50/4, pertains to the modification of the thrust reverser electrical control system on Falcon 900 aircraft to prevent abnormal loads on the door actuating linkages during landing rebounds. The requirement to comply with this directive is tied to the specifications outlined in the Avions Marcel Dassault - Breguet Aviation Service Bulletin AMD-BA/F900/54 R2, with an effective date prior to 22 May 1990. Additionally, the directive references DGAC Airworthiness Directive 89-106-008 (B) R1 for further context. Failure to adhere to these requirements could result in non-compliance with the Civil Aviation Regulations, potentially affecting the airworthiness certification of the aircraft.
Key Provisions
The Civil Aviation Regulations 1998, under PART 39 - 105, includes specific Airworthiness Directives (ADs) aimed at ensuring the safety and airworthiness of certain aircraft. One such AD, AD/AMD 50/4, pertains to the thrust reverser electrical control system of Falcon 50 and 900 series aeroplanes (Section 105). This particular directive applies to all Falcon 900 aircraft and mandates that operators adhere to the modifications detailed in the Avions Marcel Dassault - Breguet Aviation Service Bulletin AMD-BA/F900/54 R2 (Section 2). It also references DGAC Airworthiness Directive 89-106-008 (B) R1 for additional context (Section 2/90). Compliance with this directive must be achieved before 22 May 1990.
The obligations imposed by this AD are primarily technical in nature, focusing on the modification of the thrust reverser electrical control system. Operators must ensure that the thrust reverser doors remain open when ordered to be deployed on the ground, thereby preventing the automatic stow signal from generating during landing rebounds (Section 2). This action mitigates the risk of abnormal loads on the door actuating linkages, which can occur if thrust is applied to the doors while they are in the process of being stowed (Section 2). The requirement is clear: modifications must be made in accordance with the specified service bulletin to maintain compliance with airworthiness standards.
Failure to comply with the AD could result in significant safety risks, potentially leading to severe consequences during landing operations. While the specific legal consequences are not detailed in the provided text, non-compliance with airworthiness directives generally can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). These actions may include fines, suspension of airworthiness certificates, or other regulatory penalties. The exact penalties can vary depending on the severity and circumstances of the non-compliance, but they are intended to ensure that all aircraft meet the necessary safety standards.