COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Boeing 767 Series Aeroplanes
AD/B767/31 EEC System Electromagnetic Shielding 1/90
Applicability: As detailed in the Requirement Document.
Requirement: Action in accordance with Boeing SB 767-71-0041 R2 or later revision.
Note: FAA AD 89-21-04 refers.
Compliance: Prior to 25 April 1991.
Background: Boeing have advised that at the maximum probable lightning threat level, lightning induced voltage transients in excess of the EEC qualification requirement may result. A lightning strike at take-off could therefore adversely affect EEC operation and could result in uncommanded thrust loss greater than the loss of one engine.
Overview
The Civil Aviation Regulations 1998, specifically PART 39 - 105, includes an Airworthiness Directive (AD) concerning Boeing 767 Series Aeroplanes, which was enacted to address the issue of electromagnetic interference due to lightning strikes. This legislative instrument, AD/B767/31, was introduced to ensure that Boeing 767 aeroplanes comply with necessary electromagnetic shielding standards to protect against the adverse effects of lightning strikes, particularly during take-off. The directive references Boeing Service Bulletin 767-71-0041 R2 or later revisions and aligns with the Federal Aviation Administration's AD 89-21-04. The Civil Aviation Safety Authority (CASA), acting under the authority of the Australian Parliament, issued this directive to enhance the safety of civil aviation operations by mandating specific actions to mitigate the risks associated with lightning-induced voltage transients that could compromise the Electronic Engine Control (EEC) system, potentially leading to uncommanded thrust loss.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority's (CASA) schedule of airworthiness directives, focusing on the Boeing 767 Series aeroplanes. This legislative instrument is applicable to all operators of Boeing 767 aircraft within Australia, ensuring that they comply with the specified airworthiness directives to maintain the safety standards required under Australian aviation law. The directive AD/B767/31 addresses the requirement for electromagnetic shielding of the EEC system, aligning with Boeing Service Bulletin 767-71-0041 revision 2 or later. Compliance with this directive is crucial as it aims to prevent potential uncommanded thrust loss due to lightning-induced voltage transients, which could occur during take-off and compromise the aircraft's operational safety. This legislation is not limited to Australia but aligns with international standards, notably referencing FAA AD 89-21-04. The directive must be adhered to before 25 April 1991, underscoring the urgency and importance of implementing the necessary measures to mitigate risks associated with electromagnetic interference.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, address the safety directives for Boeing 767 series aeroplanes, focusing on the electromagnetic shielding of the Electronic Engine Control (EEC) system. Section AD/B767/31 mandates that the applicable aircraft must comply with Boeing Service Bulletin 767-71-0041, Revision 2 or later, to ensure the EEC system is adequately shielded against electromagnetic interference. This directive applies to all aircraft within the specified series as outlined in the Requirement Document (Section 1). Compliance with these directives was mandatory before 25 April 1991.
These regulations impose specific obligations on the operators of Boeing 767 series aeroplanes. Operators must ensure that their aircraft meet the electromagnetic shielding requirements as stipulated by Boeing Service Bulletin 767-71-0041. This involves implementing the recommended modifications or actions detailed in the bulletin to prevent potential uncommanded thrust loss, which could occur due to lightning strikes. It is essential that the aircraft’s maintenance and operational procedures adhere to these safety standards to avoid compromising the aircraft’s safety and operational integrity.
Failure to comply with the Civil Aviation Regulations 1998 and the specified airworthiness directives can result in significant legal consequences. Section 91.901 of the Civil Aviation Act 1988 stipulates that non-compliance with an airworthiness directive can be an offence. The penalties for such offences can include substantial fines and potential imprisonment. Specifically, for individuals, the maximum penalty can be up to $210,000 or imprisonment for up to two years, or both. For corporations, the maximum penalty can reach up to $1,050,000. These stringent penalties underscore the importance of adhering to the regulatory requirements to maintain safety standards in civil aviation.