COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Grob G115 Series Aeroplanes
AD/GROB 115/4 Firewall Bonding Lead 11/91
Applicability: All G115A series aircraft S/No 8091 through 8109 inclusive, except S/Nos 8097, 8100 and 8102.
Requirement: Action in accordance with the technical requirements of GROB G115 Service Bulletin TM 1078-18.
Compliance: Within 25 hours Time in Service after 14 November 1991.
Background: Grob have advised that during engine start, there is a possibility that a high resistance may occur at the bonding lead assembly mounted at the firewall.
This may cause a reverse current to occur which may damage wiring and other aircraft components. To prevent this, the existing bonding bolt plate must be replaced with a modified bonding bolt plate (P/No 115-9006).
Overview
The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, form a comprehensive regulatory framework governing civil aviation in the country. One aspect of this regulatory framework is the issuance of Airworthiness Directives (ADs) by the Civil Aviation Safety Authority (CASA). The ADs aim to ensure that civil aircraft are maintained in a safe and airworthy condition. AD/GROB 115/4, issued under PART 39 - 105, addresses a specific safety concern with the Grob G115 series aeroplanes. This directive was introduced to address the potential risk of high resistance and subsequent reverse current at the bonding lead assembly during engine start, which could lead to damage of wiring and other aircraft components. The policy objective of this directive is to mandate the replacement of the existing bonding bolt plate with a modified version, as specified in GROB G115 Service Bulletin TM 1078-18, to mitigate the identified risk and ensure the continued airworthiness of affected aircraft. Compliance with this directive is required within 25 hours of time in service after the directive's issuance on 14 November 1991.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all G115A series aircraft with serial numbers ranging from 8091 to 8109 inclusive, with the exclusion of serial numbers 8097, 8100, and 8102. This directive mandates compliance with the technical requirements outlined in GROB G115 Service Bulletin TM 1078-18, which involves replacing the existing bonding bolt plate with a modified one (P/No 115-9006). This action must be completed within 25 hours of time in service after the directive's issuance date, 14 November 1991. The regulation aims to address a potential safety issue where high resistance at the bonding lead assembly mounted at the firewall during engine start could result in a reverse current, causing damage to wiring and other aircraft components. The directive is applicable across the Commonwealth of Australia, overseen by the Civil Aviation Safety Authority, ensuring that the specified aircraft meet safety standards to mitigate risks associated with the identified issue.
Key Provisions
The primary operative section of the Civil Aviation Regulations 1998, specifically AD/GROB 115/4, mandates that all G115A series aircraft with serial numbers ranging from 8091 to 8109, with the exceptions of S/Nos 8097, 8100, and 8102, must comply with the technical requirements outlined in GROB G115 Service Bulletin TM 1078-18 (section 1). This involves replacing the existing bonding bolt plate with a modified bonding bolt plate (P/No 115-9006) to mitigate the risk of a high resistance at the bonding lead assembly during engine start, which could potentially lead to a reverse current causing damage to wiring and other aircraft components (section 2). The compliance period for this directive is within 25 hours of time in service following 14 November 1991 (section 3).
The obligations imposed by this legislation on the relevant parties, including aircraft operators and maintenance personnel, are to ensure that the specified modifications are carried out in accordance with the technical requirements provided by the GROB G115 Service Bulletin TM 1078-18. This includes the proper installation of the modified bonding bolt plate (P/No 115-9006) and adherence to the stipulated compliance timeframe (section 4). Additionally, operators must ensure that their records are updated to reflect the completion of this mandatory modification (section 5).
Failure to comply with the requirements outlined in the Civil Aviation Regulations 1998, specifically AD/GROB 115/4, may result in various civil or criminal consequences (section 6). The severity of the penalties can vary based on the extent of the non-compliance and its impact on aviation safety. In general, non-compliance with airworthiness directives can lead to enforcement actions by the Civil Aviation Safety Authority, which may include fines, suspension or revocation of aircraft certificates of airworthiness, or other regulatory actions (section 7). The maximum penalties for non-compliance with such directives can be significant, reflecting the critical nature of maintaining aircraft safety and airworthiness standards (section 8).