COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
British Aerospace BAe 125 Series Aeroplanes
AD/HS 125/139 Thrust Reverser - Control Circuit Wiring 4/94
Applicability: All BAe 125 Series 1000 aircraft identified in Raytheon Corporate Jets Incorporated Mandatory Service Bulletin SB.78-9-3662B dated 7 January 1994.
Requirement: Incorporate Modification Number 253662B in accordance with Raytheon Corporate Jets Incorporated Mandatory Service Bulletin SB.78-9-3662B dated 7 January 1994.
Note: This Service Bulletin has been classed as Mandatory by the CAA(UK).
Compliance: Prior to 31 October 1994.
Background: This Directive is issued to improve the integrity of the thrust reverser electrical control circuit and to correct the rudder bias not inhibited annunciation logic.
This will prevent the application of high thrust reverse with an asymmetric configuration and uninhibited rudder bias before the condition is annunciated.
Overview
The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the maintenance and airworthiness of aircraft in Australia by incorporating the Civil Aviation Safety Authority's Schedule of Airworthiness Directives. One such directive, AD/HS 125/139, targets the British Aerospace BAe 125 Series aeroplanes, aiming to enhance the safety and reliability of these aircraft by mandating modifications to the thrust reverser control circuit wiring. This directive was enacted to address specific issues related to the electrical control circuit integrity and the logic for annunciating rudder bias, ensuring that high thrust reverse is not applied under asymmetric configurations without proper annunciation. The directive applies to all BAe 125 Series 1000 aircraft identified in a relevant service bulletin and requires compliance by a specific date to mitigate potential safety risks.
The Australian Parliament enacted the Civil Aviation Act 1988 to provide a comprehensive legal framework governing civil aviation safety and operations within Australia. This legislative instrument is a demonstration of the Civil Aviation Safety Authority’s commitment to ensuring that all aircraft meet stringent safety standards. The policy objective behind this directive is to maintain the highest level of safety in civil aviation by mandating specific modifications that address identified vulnerabilities in aircraft systems, thereby protecting both the aircraft and its occupants.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all BAe 125 Series 1000 aircraft as identified in Raytheon Corporate Jets Incorporated Mandatory Service Bulletin SB.78-9-3662B dated 7 January 1994. This regulation pertains to the modification of the thrust reverser control circuit wiring for these aircraft. The directive mandates the incorporation of Modification Number 253662B as per the aforementioned service bulletin, which has been classified as mandatory by the UK Civil Aviation Authority. The requirement for compliance must be met prior to 31 October 1994. This directive is aimed at enhancing the integrity of the thrust reverser electrical control circuit and rectifying the logic of the rudder bias not inhibited annunciation, ensuring that high thrust reverse is not applied with an asymmetric configuration and uninhibited rudder bias before the condition is properly announced. This legislative instrument extends its jurisdictional reach across the Commonwealth of Australia, enforcing standards that are critical for the safety and proper functioning of specified aircraft within its airspace.
Key Provisions
The Civil Aviation Regulations 1998, specifically within Part 39, mandate the incorporation of certain modifications to ensure the airworthiness of British Aerospace BAe 125 Series 1000 aircraft. According to section AD/HS 125/139, all BAe 125 Series 1000 aircraft identified in Raytheon Corporate Jets Incorporated Mandatory Service Bulletin SB.78-9-3662B dated 7 January 1994 are required to incorporate Modification Number 253662B. This modification is intended to improve the integrity of the thrust reverser electrical control circuit and to correct the logic concerning the rudder bias not inhibited annunciation. The directive aims to prevent the application of high thrust reverse with an asymmetric configuration and uninhibited rudder bias before such conditions are annunciated.
These provisions impose specific obligations on aircraft operators and maintenance personnel. Operators of BAe 125 Series 1000 aircraft must ensure that the mandated modifications are completed as per the instructions outlined in the referenced Service Bulletin. This involves a thorough review of the aircraft’s electrical control circuit and ensuring that the modifications are implemented correctly and effectively. Maintenance personnel are responsible for executing these modifications and verifying compliance with the specified standards.
Failure to comply with these airworthiness directives can lead to serious consequences. If an operator fails to implement the required modifications by the compliance date of 31 October 1994, it can result in the aircraft being deemed unairworthy. This can lead to enforcement actions by the Civil Aviation Safety Authority, which may include fines and other regulatory penalties. Additionally, operating an aircraft that does not meet the specified airworthiness standards can result in criminal charges and imprisonment for the responsible parties, as stipulated by the Civil Aviation Act 1988. The maximum penalties for such offences can include substantial fines and imprisonment terms, reflecting the critical nature of these safety requirements.