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 125/85
Amdt 1
Battery Cable Chafing 3/88
Applicability: BAe/HS/BH/DH-125 Series aircraft as follows:
Series 1A with modification 252606 Series 1A/S with modification 252605 Series 3A with modification 252603 Series 3A/RA with modification 252600 Series 400A with modification 252550 Series 600A with modification 252468 Series 700A - NA0201 to NA0333 inclusive Series 700B - 257001 to 257190 inclusive All series F1B, F3B, F3B/RA, F400B and F600B retrofitted with Garrett TFE 731-3 engines.
Requirement: 1. (a) Isolate all electrical power and disconnect batteries.
(b) Locate and gain access to panel ZL and remove lower cover on ZL.
(c) Locate emergency contactors 1 and 2 identified L and M.
(d) Inspect the size 10 cables which run from each emergency contactor lower terminal for chafing and damage, pay particular attention to cable runs in way of the fuse block support mountings at the bottom of the panel.
2. If damage is found replace affected cable.
Note: British Aerospace 125 Alert Service Bulletin 24-A261 refers.
Compliance: For Para’s 1 and 2: Before further flight after 13 March 1987, and thereafter at intervals not exceeding 12 months.
Note: Completion of Mod. 253204A and B constitutes terminating action for repeat inspections.
Background: BAe ASB 24-A261 Rev 1 introduces a requirement for repeat inspections at intervals not exceeding 12 months until incorporation of Mod. 253204.
Overview
The Civil Aviation Safety Authority, under the authority of the Civil Aviation Regulations 1998, has issued an Airworthiness Directive (AD) to address the issue of battery cable chafing in British Aerospace BAe 125 Series aeroplanes. The AD, numbered AD/HS 125/85 Amendment 1, was introduced to mitigate risks associated with chafing and damage to the size 10 cables running from the emergency contactors in specified series of the BAe 125 aircraft. The directive applies to aircraft within certain serial number ranges and modifications, and it mandates specific actions, such as isolating electrical power, inspecting cables for damage, and replacing any affected cables. Compliance with these requirements is essential before further flight after 13 March 1987 and at intervals not exceeding 12 months, until modification 253204 is incorporated. The policy objective of this AD is to ensure the ongoing airworthiness of the aircraft by preventing potential electrical failures due to cable chafing, thereby enhancing flight safety.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, issued by the Civil Aviation Safety Authority (CASA), mandate that certain British Aerospace BAe 125 Series aeroplanes comply with specific airworthiness directives. This regulation applies to all BAe/HS/BH/DH-125 Series aircraft including Series 1A, 1A/S, 3A, 3A/RA, 400A, 600A, 700A, 700B, and F1B, F3B, F3B/RA, F400B, and F600B models that have been retrofitted with Garrett TFE 731-3 engines. The directive requires specific modifications and inspections to be conducted to ensure the safety of the aircraft, focusing on the inspection and replacement of size 10 cables to prevent chafing and damage, particularly around the fuse block support mountings at the bottom of the panel. Compliance with these requirements must be met before further flight after 13 March 1987 and subsequently at intervals not exceeding 12 months. The completion of modification 253204A and B terminates the need for repeat inspections. The regulation does not extend to other aircraft models not specified in the directive.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, contains an Airworthiness Directive (AD) concerning British Aerospace BAe 125 Series Aeroplanes, aimed at addressing issues related to battery cable chafing. This directive is designated AD/HS 125/85 Amendment 1 and applies to certain series of BAe/HS/BH/DH-125 aircraft with specific modifications (sections 1 and 2). The primary requirement under this directive is to isolate all electrical power and disconnect batteries, followed by accessing panel ZL and inspecting the size 10 cables running from emergency contactors 1 and 2 for signs of chafing and damage, with particular attention to cable runs near the fuse block support mountings (section 1(a)-(d)). If any damage is found, the affected cables must be replaced (section 2).
The obligations imposed by this directive are stringent, demanding that the specified maintenance actions be carried out before further flight after the directive's issuance date of 13 March 1987 and thereafter at intervals not exceeding 12 months (section 1). The directive also references British Aerospace Alert Service Bulletin 24-A261, which provides additional guidance and context for the inspections and modifications required (section 1). Compliance with the directive is critical for ensuring the continued airworthiness of the affected aircraft.
Failure to comply with the requirements set out in this directive can lead to serious consequences. While the Civil Aviation Regulations do not explicitly detail the specific offences, penalties, or consequences for non-compliance with Airworthiness Directives, general provisions under the Civil Aviation Act 1988 may apply. Non-compliance could result in enforcement actions by the Civil Aviation Safety Authority (CASA), including fines, legal proceedings, and potential grounding of the aircraft. The severity of penalties can vary depending on the nature and extent of the non-compliance, but they are designed to ensure that aircraft remain safe and compliant with regulatory standards.