COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
British Aerospace BAe 125 Series Aeroplanes
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
AD/HS 125/163 Wire Bundle Chafing 1/2001
Applicability: Model Hawker 800XP series aeroplanes, as listed in Raytheon Service Bulletin SB
24-3212, dated August 1999; and Hawker 800 (U-125A) series aeroplanes, as listed in Raytheon Service Bulletin SB 24-3213, Revision 1, dated February 2000.
Requirement: 1. Conduct a one-time detailed visual inspection of the panel "JA" wire bundle in accordance with the Accomplishment Instructions of SB 24-3212 (for Model 800XP series aeroplanes); or SB 24-3213, Revision 1 (for Model 800 (U-125A) series aeroplanes); as applicable. Ensure that:
- the wire bundle is routed correctly, in accordance with Figure 1 of the applicable service bulletin, and
b. a minimum clearance of 6mm (0.25-inch) exists between the wire bundle from relay "KT" and the fuel cross-feed valve operating lever throughout its range of travel.
If the wire bundle is routed correctly and sufficient clearance exists, no further action is required by this Directive.
Note 1: For the purposes of this Directive, a detailed visual inspection is defined as: "An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required."
2. If the wire bundle is not routed correctly or if sufficient clearance does not exist, perform a detailed visual inspection of the wire bundle to relay "KT" for chafing, in accordance with the Accomplishment Instructions of SB 24-3212 or SB 24- 3213, Revision 1; as applicable.
- If chafing is not detected, ensure that the wire bundle is routed correctly and ensure that a minimum clearance of 6mm (0.25-inch) exists between the wire bundle and the fuel cross-feed valve operating valve throughout its range of travel, in accordance with the applicable service bulletin.
b. If any chafing is detected, repair the chafed wire, ensure that the wire bundle is routed correctly and ensure that a minimum clearance of 6mm (0.25-inch) exists between the wire bundle and the fuel cross-feed valve operating valve throughout its range of travel, in accordance with the applicable service bulletin.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Note 2: FAA AD 2000-22-22 Amdt 39-11970 refers.
Compliance: For Requirement 1 - Within 50 flight hours or 6 months after the effective date of this Directive, whichever occurs first.
For Requirement 2 - Before further flight.
This Airworthiness Directive becomes effective on 25 January 2001.
Background: This Directive requires inspection of the wire bundle to relay ‘KT’ on panel ‘JA’ for correct routing, adequate clearance from the fuel cross-feed valve operating lever, and the presence of chafing. The Directive also requires necessary action to correct any wiring anomaly.
These actions are intended to detect and correct chafing of the wire bundle exiting panel ‘JA’ due to insufficient clearance from the fuel cross-feed valve operating lever. Chafing of the wire bundle could result in a fire in the area of the fuel system in a confined space.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 11 December 2000
The above AD is notified in the Commonwealth of Australia Gazette on 20 December 2000.
Overview
The Civil Aviation Regulations 1998, under the authority of the Civil Aviation Act 1988, address safety concerns in the aviation industry. Specifically, Part 39 - 105 of these regulations, issued by the Civil Aviation Safety Authority (CASA), provides a framework for the issuance of Airworthiness Directives (ADs) aimed at maintaining the highest safety standards. The AD/HS 125/163 concerning the British Aerospace BAe 125 Series Aeroplanes was enacted in response to identified risks associated with wire bundle chafing, which could potentially lead to fires in the fuel system area. The directive mandates corrective actions for specific models of Hawker 800XP and Hawker 800 (U-125A) series aeroplanes, ensuring these aircraft meet the necessary safety standards. The policy objective is to mitigate safety risks by requiring detailed inspections and repairs to prevent wire bundle chafing and its associated hazards.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates the issue of Airworthiness Directives (ADs) by the Civil Aviation Safety Authority (CASA) to ensure aviation safety. This AD applies to specific models of the British Aerospace BAe 125 Series aeroplanes, namely the Hawker 800XP series aeroplanes listed in Raytheon Service Bulletin SB24-3212, dated August 1999, and the Hawker 800 (U-125A) series aeroplanes listed in Raytheon Service Bulletin SB 24-3213, Revision 1, dated February 2000. The directive focuses on addressing potential issues with the routing and clearance of the panel "JA" wire bundle to prevent chafing and related safety hazards. The compliance timeframes specified are within 50 flight hours or 6 months after the effective date for the initial inspection, and before further flight if any corrective action is required. The AD was made effective on 25 January 2001, and its requirements must be adhered to by operators of the specified aircraft models within the Commonwealth of Australia.
Key Provisions
The Civil Aviation Regulations 1998, Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives includes a specific Airworthiness Directive (AD) for the British Aerospace BAe 125 Series Aeroplanes, notably the Hawker 800XP series and Hawker 800 (U-125A) series aeroplanes. This AD, designated as AD/HS 125/163, pertains to the issue of wire bundle chafing, which poses a safety risk due to potential fire hazards. According to section 39.1 (1) of the Civil Aviation Regulations 1998, the AD mandates certain actions to ensure the safety of these aircraft.
The directive requires two main actions. Firstly, it mandates a detailed visual inspection of the panel "JA" wire bundle to ensure that it is routed correctly and maintains a minimum clearance of 6mm from the fuel cross-feed valve operating lever throughout its range of travel. If these conditions are met, no further action is necessary. Secondly, if the wire bundle is not routed correctly or if the required clearance is not achieved, a more detailed inspection for chafing is required. If chafing is detected, the wire must be repaired, and the bundle rerouted to meet the clearance requirement. These inspections and repairs must be carried out in accordance with the instructions provided in Raytheon Service Bulletins SB 24-3212 and SB 24-3213, Revision 1, respectively.
Entities governed by this AD, including aircraft operators and maintenance providers, must comply with the specified requirements. For Requirement 1, compliance must be achieved within 50 flight hours or six months from the effective date of the AD, whichever comes first. For Requirement 2, any necessary action must be taken before further flight if the wire bundle is found to be improperly routed or insufficient clearance exists. Failure to comply with these requirements can result in the aircraft not meeting airworthiness standards, which could lead to serious safety risks and potential regulatory action.
The consequences of non-compliance with this AD can be severe, as it directly impacts the safety of the aircraft. Civil Aviation Safety Authority (CASA) may take enforcement action against non-compliant entities, which could include fines, operational restrictions, or other penalties. The exact penalties are not specified in the text but are typically aligned with the severity of the non-compliance and the risk posed to aviation safety.