AD/B767/97 - Battery Ground Termination Inspection

Overview

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, introduces Airworthiness Directives aimed at ensuring the safety of aircraft, including the Boeing 767 series aeroplanes. The AD/B767/97 mandate, which was enacted to address the problem of smoke or fire incidents linked to the auxiliary power unit (APU) battery grounds, was established in response to several reported incidents where improper installation and maintenance of the APU battery grounds led to overheating and potential fire hazards. The directive was enacted by the Civil Aviation Safety Authority (CASA), reflecting a policy objective to enhance the safety standards of aircraft operations. Compliance with this directive involves a mandatory detailed visual inspection of the battery ground terminations of the APU, to be completed by 9 January 1998, with subsequent inspections to occur at intervals not exceeding 1,000 flight hours, ensuring that any detected damage is rectified before further flight.

Scope and Application

The Civil Aviation Regulations 1998, as amended, pertain to all Boeing 767 series aeroplanes operating within the jurisdiction of the Commonwealth of Australia. Specifically, this regulation applies to all entities that operate Boeing 767 aircraft, including commercial airlines, charter operators, and private aircraft owners, and mandates compliance with the airworthiness directives outlined within. The directive mandates a detailed visual inspection to detect any damage and ensure proper configuration of the battery ground terminations of the Auxiliary Power Unit (APU) at the battery and connected structure. If no damage is detected, it is imperative that all battery ground terminations are configured correctly, adhering to the Boeing Standard Wiring Practices Manual D6-54446. Conversely, if damage is detected or improper configuration is found, the affected battery ground terminations must be removed, replaced, and repaired in accordance with the same manual and applicable Boeing drawings. Compliance with this directive is stringent, requiring the initial inspection to be completed by 9 January 1998, with subsequent inspections occurring at intervals not exceeding 1,000 flight hours. It is noteworthy that the installation of Boeing Alert Service Bulletin 767-24A0111 is considered the terminating action for the repetitive inspections. This airworthiness directive became effective on 6 November 1997, in response to multiple reports of smoke or fire incidents originating from areas adjacent to the APU battery grounds, which were traced to improper installation and maintenance of the battery grounds.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, contain a Schedule of Airworthiness Directives that apply to Boeing 767 Series Aeroplanes. One such directive, AD/B767/97, pertains to the inspection of battery ground terminations of the Auxiliary Power Unit (APU). This directive is essential for maintaining the safety of Boeing 767 aircraft by preventing potential smoke or fire incidents originating from improperly installed or maintained battery grounds. Section 1 of the directive mandates a detailed visual inspection to detect any damage and ensure proper configuration of the battery ground terminations at the battery and connected structure. If no damage is found, the terminations must be configured properly, adhering to Boeing Standard Wiring Practices Manual D6-54446. However, if damage is detected or improper configuration is found, the damaged terminations must be removed, replaced, and repaired as per the same manual and applicable Boeing drawings. Compliance with this airworthiness directive is crucial for all Boeing 767 aircraft. The initial inspection must be completed by 9 January 1998. Furthermore, the visual inspection must be repeated at intervals not exceeding 1,000 flight hours. Importantly, requirement 1b must be fulfilled before further flight. The installation of Boeing Alert Service Bulletin 767-24A0111 is considered the terminating action for these repetitive inspections. This directive became effective on 6 November 1997, following several reports of smoke or fire near the APU battery grounds on Boeing 767 series airplanes. Investigations revealed that improper installation and maintenance of the APU battery grounds, coupled with the design vulnerability of the single lug battery ground to overheating, were primary factors in these incidents. The obligations imposed by this directive are stringent and aim to ensure that the battery ground terminations of the APU are maintained in a safe and compliant condition. Operators and maintenance personnel must conduct thorough inspections and corrective actions as required, using the specified Boeing manuals and drawings to ensure accuracy and compliance. Failure to adhere to these requirements could lead to serious safety hazards, including smoke or fire incidents that could endanger passengers and crew, damage the aircraft, and disrupt aviation operations. Breaching the provisions of this airworthiness directive can lead to significant civil and criminal consequences. The Civil Aviation Safety Authority (CASA) has the authority to enforce these regulations, and violations can result in penalties under the Civil Aviation Act 1988. The maximum penalties for non-compliance can include fines and, in severe cases, imprisonment. Additionally, operators found in breach of these directives may face suspension or revocation of their Air Operator Certificate, grounding of the affected aircraft, and other enforcement actions that could severely impact their operations and reputation. Ensuring strict adherence to these safety requirements is thus imperative for all parties governed by the Civil Aviation Regulations 1998.