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.
Bombardier (Canadair) CL-600 Series Aeroplanes
AD/CL-600/51 Chafed IDG Cables 5/2002 DM
Applicability: CL-600-2B16 "Challenger" aircraft as follows:
CL-600-2B16 (CL-601-3R) serial numbers (S/N) 5135 through 5194 inclusive; and
CL-600-2B16 (CL-604) S/N 5301 through 5481 inclusive.
Requirement: 1. Unless previously accomplished, visually inspect the integrated drive generator (IDG) cables for both left and right engines for chafing and damage between the service pylon connections to the IDG in accordance with the Accomplishment Instructions of the applicable Bombardier Alert Service Bulletin (ASB) below:
- CL-600-2B16 (CL-601-3R) aeroplanes - ASB A601-0542 dated 12 January 2001; or
b. CL-600-2B16 (CL-604) aeroplanes - ASB A604-73-002 dated 12 January 2001.
2. If chafing or damage is detected, repair as follows:
- If the inner core of the cable is not visible and not damaged, install a repair or replace the damaged IDG cable in accordance with ASB A601-0542 or ASB A604-73-002 as applicable.
b. If the inner core is visible or damaged, replace the damaged IDG cable.
Bombardier (Canadair) CL-600 Series Aeroplanes
AD/CL-600/51 (Continued)
3. Install protective Teflon tubing and additional clamp hardware on the IDG cable harness in accordance with ASB A601-0542 or ASB A604-73-002 as applicable.
Note: Transport Canada AD CF-2001-06 refers.
Compliance: Requirement 1 - Within 50 hours time in service (TIS) after the effective date of this Directive.
Requirement 2 - Before further flight after the Requirement 1 inspection. Requirement 3 - Within 400 hours TIS after the effective date of this Directive. This Airworthiness Directive becomes effective on 10 April 2002.
Background: Transport Canada has advised that a report has been received from a CRJ-100 operator of electrical arcing between the IDG cable and an engine cowl door due to IDG cable chafing. The IDG cable installation in the Challenger model is similar to that of the CRJ-100. This arcing condition, if not corrected, could potentially be an ignition source of an in-flight fire and/or result in the in-flight loss of generated electrical power.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 3 April 2002
The above AD is notified in the Commonwealth of Australia Gazette on 10 April 2002.
Overview
The Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under subregulation 39.1(1) of the Civil Aviation Regulations 1998 is designed to address safety concerns related to the chafing and potential damage of integrated drive generator (IDG) cables in specific models of the Bombardier (Canadair) CL-600 Series aeroplanes. This legislative instrument, issued on 3 April 2002 and becoming effective on 10 April 2002, aims to rectify unsafe conditions that could potentially lead to electrical arcing, in-flight fires, or loss of generated electrical power. The AD applies to CL-600-2B16 (CL-601-3R) aircraft with serial numbers 5135 through 5194 inclusive, and CL-600-2B16 (CL-604) aircraft with serial numbers 5301 through 5481 inclusive. The primary policy objective of this directive is to ensure the airworthiness of the affected aircraft by mandating specific visual inspections, repairs, and enhancements to the IDG cables in accordance with specified timelines and instructions.
Scope and Application
This Airworthiness Directive issued under subregulation 39.1(1) of the Civil Aviation Regulations 1998 by the Civil Aviation Safety Authority (CASA) applies to specific Bombardier (Canadair) CL-600 series aeroplanes, specifically those of the CL-600-2B16 variant. The affected aircraft include those with serial numbers 5135 through 5194 for CL-600-2B16 (CL-601-3R) and serial numbers 5301 through 5481 for CL-600-2B16 (CL-604). The directive mandates actions to address the issue of chafed integrated drive generator (IDG) cables, which could lead to potential in-flight fires or loss of electrical power. The requirements include inspecting the IDG cables for chafing and damage, repairing or replacing damaged cables as per specified Bombardier Alert Service Bulletins, and installing protective Teflon tubing and additional clamp hardware. Compliance must be achieved within 50 hours of time in service for the initial inspection, before further flight for any repairs, and within 400 hours of time in service for the installation of protective measures. This directive extends to the national level across Australia and is effective as of 10 April 2002.
Key Provisions
The Airworthiness Directive (AD) issued under subregulation 39.1(1) of CAR 1998 applies specifically to Bombardier (Canadair) CL-600 Series Aeroplanes, namely CL-600-2B16 (CL-601-3R) serial numbers 5135 through 5194 inclusive, and CL-600-2B16 (CL-604) serial numbers 5301 through 5481 inclusive (sections 2 and 3). The directive mandates several actions to address a safety issue related to the integrated drive generator (IDG) cables that could lead to in-flight fires or loss of electrical power. The requirements outlined in the directive must be followed in the circumstances and manner specified and within the compliance time frames given (section 4).
The primary obligations imposed by this AD are detailed in the requirement section (section 5). First, operators must visually inspect the IDG cables for chafing and damage between the service pylon connections to the IDG, following the instructions in the applicable Bombardier Alert Service Bulletin (ASB) (section 5(a)). If any chafing or damage is found, the directive specifies different actions depending on the condition of the inner core of the cable: if the inner core is not visible and is not damaged, the cable should be repaired or replaced in accordance with ASB A601-0542 for CL-600-2B16 (CL-601-3R) aeroplanes or ASB A604-73-002 for CL-600-2B16 (CL-604) aeroplanes; if the inner core is visible or damaged, the IDG cable must be replaced (section 5(b)). Additionally, operators must install protective Teflon tubing and additional clamp hardware on the IDG cable harness as per the relevant ASB (section 5(c)).
Failure to comply with the AD's requirements may result in significant consequences. While the AD does not explicitly list offences or penalties, non-compliance with such directives generally carries severe implications under the Civil Aviation Safety Authority (CASA) regulations. This could potentially include enforcement actions by CASA, fines, or other regulatory sanctions, which may be pursued under relevant aviation safety legislation. The directive underscores the critical nature of adhering to these safety measures to prevent potential in-flight hazards.