COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Israel Aircraft Industries 1125 (Astra) Series Aeroplanes
AD/IAI-A/2 Aileron Autopilot Servo 1/2000 DM
Applicability: Models 1125 and Astra SPX aeroplanes with serial numbers 030 and 042 to 086 inclusive.
Requirement: 1. Check the attachment arm position of the SVO-85C autopilot aileron servo actuator.
2. If the position of the arm is found to be incorrect during the Requirement 1 check, inspect the arm, control link and bellcrank for damage and, if necessary, repair or replace the damaged parts.
3. Install a stopper angle.
Note 1: All actions are to be completed in accordance with Astra Alert Service Bulletin No 1125-27A-157.
Note 2: Israel CAA AD 27-99-10-06 refers.
Compliance: 1. Within 50 hours time in service from 8 December 1999.
2. Before further flight following the Requirement 1 inspection.
3. Within 50 hours time in service from 8 December 1999.
This Airworthiness Directive becomes effective on 8 December 1999.
Background: The Israel CAA has advised of an unsafe condition involving possible rolling oscillations during autopilot operation. A shorter attachment arm on a new type of autopilot aileron servo actuator allows operation beyond former travel limits, this in turn can drive a control link out of position causing actuation in the opposite direction of autopilot command.
Overview
The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, were introduced to ensure the safety and regulation of civil aviation within Australia. One part of this legislative framework is the schedule of Airworthiness Directives, which includes specific directives for various aircraft types, such as the Israel Aircraft Industries 1125 (Astra) Series Aeroplanes. The particular directive AD/IAI-A/2, effective from 8 December 1999, addresses an unsafe condition involving the aileron autopilot servo actuator on certain Astra models. The directive mandates checks and corrective actions to prevent rolling oscillations during autopilot operation, which could potentially lead to safety issues. This directive is a response to a safety concern identified by the Israel Civil Aviation Authority and aims to ensure compliance with established safety standards to maintain airworthiness.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority Schedule of Airworthiness Directives, apply to the Israel Aircraft Industries 1125 (Astra) Series Aeroplanes, including models 1125 and Astra SPX with serial numbers 030 and 042 to 086 inclusive. This directive mandates specific actions to ensure the airworthiness of the affected aircraft, focusing on the SVO-85C autopilot aileron servo actuator's attachment arm position. Should the arm be found incorrectly positioned, further inspection and necessary repairs or replacements of damaged components are required, followed by the installation of a stopper angle. Compliance with these directives is mandatory within specific timeframes post-effective date, ensuring adherence to safety standards and avoiding unsafe rolling oscillations during autopilot operation as reported by the Israel Civil Aviation Authority. This directive extends its reach across the Commonwealth of Australia, impacting operators and maintenance personnel of the specified aircraft models.
Key Provisions
The key operative sections of this legislation (Civil Aviation Regulations 1998, PART 39 - 105) pertain to the maintenance and operation of specific models of the Israel Aircraft Industries 1125 (Astra) Series aeroplanes. The directive AD/IAI-A/2 mandates that operators of models 1125 and Astra SPX aeroplanes with serial numbers 030 and 042 to 086 inclusive must check the attachment arm position of the SVO-85C autopilot aileron servo actuator. If the arm is found to be incorrectly positioned, further inspections, repairs, or replacements of the arm, control link, and bellcrank are required. Additionally, a stopper angle must be installed. These actions are to be carried out in accordance with Astra Alert Service Bulletin No 1125-27A-157, and it is noted that Israel CAA AD 27-99-10-06 is referenced in this directive.
Operators of the affected aeroplanes must adhere to specific timelines and conditions for compliance with this Airworthiness Directive. Compliance is required within 50 hours of time in service from 8 December 1999, and before any further flight following the initial inspection. This directive became effective on 8 December 1999, and operators must ensure that all checks and repairs are completed as stipulated to maintain the airworthiness of their aircraft.
The Act imposes several obligations on the operators of the affected aircraft. Firstly, they must ensure that the attachment arm position of the SVO-85C autopilot aileron servo actuator is checked within the specified timeframe. If the arm is found to be incorrectly positioned, operators must inspect the arm, control link, and bellcrank for damage and perform any necessary repairs or replacements. Furthermore, operators are required to install a stopper angle as part of the compliance process. These actions must be conducted in strict accordance with the guidance provided in Astra Alert Service Bulletin No 1125-27A-157, ensuring that the safety measures are implemented correctly.
Failure to comply with the requirements outlined in this Airworthiness Directive may result in civil or criminal consequences. The specific offences, penalties, and consequences are not detailed in the provided text, but non-compliance with airworthiness directives typically results in enforcement actions by the Civil Aviation Safety Authority (CASA). These actions can include fines, penalties, and potentially grounding the aircraft until the required actions are taken. The maximum penalties for such breaches are determined by the regulatory body and can vary based on the severity and impact of the non-compliance.