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.
DHC-2 (Beaver) Series Aeroplanes
AD/DHC-2/32 Magneto Cannon Plug 12/2001
Applicability: All Model DHC-2 Mark I and Mark II aeroplanes.
Requirement: 1. Perform a visual inspection of the firewall ignition plug and receptacle for proper lock wiring and security in accordance with the Accomplishment Instructions of Bombardier Aerospace de Havilland Beaver Alert Service Bulletin A2/53, Revision ‘A’, dated 30 August 2001.
2. Replace any damaged parts detected during the Requirement 1 inspection.
3. Incorporate Maintenance Manual PSM 1-2-2 Temporary Revision TR2-24, dated 24 August 2001, into the periodic inspection of the aircraft approved maintenance schedule.
Note: Transport Canada AD CF-2001-36 refers.
Compliance: For Requirement 1 - Within 3 months or 110 hours time in service after the effective date of this Directive, whichever occurs first.
For Requirement 2 - Before further flight after the Requirement 1 inspection. For Requirement 3 - Within 3 months after the effective date of this Directive, This Airworthiness Directive becomes effective on 29 November 2001.
Background: Transport Canada has advised that a complete loss of both ignition systems occurred on a DHC-3 Otter when the lock wire hole in the ignition connector plug on the firewall broke out, allowing the plug to vibrate loose. A maintenance safety feature grounds out both magneto systems through a spring-loaded safety pin incorporated into the Cannon plug. The DHC-2 system is similar in design.
DHC-2 (Beaver) Series Aeroplanes
AD/DHC-2/32 (Continued)
This Directive requires a one time inspection of the ignition connector plug to detect any discrepancies and, if necessary, their rectification. The Directive also requires amendment of the Maintenance Manual.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 17 October 2001
The above AD is notified in the Commonwealth of Australia Gazette on 7 November 2001.
Overview
The Airworthiness Directive DHC-2/32 was enacted in 2001 by the Civil Aviation Safety Authority (CASA) under subregulation 39.1 (1) of the Civil Aviation Regulations 1998 (CAR 1998). This directive was introduced to address the safety issue identified by Transport Canada regarding the potential loss of both ignition systems on DHC-2 (Beaver) Series aeroplanes due to the lock wire hole in the ignition connector plug breaking out, leading to the plug vibrating loose. The policy objective of this directive is to ensure the safety and airworthiness of DHC-2 aeroplanes by requiring inspections and necessary repairs to prevent the recurrence of such unsafe conditions. The directive mandates a visual inspection of the firewall ignition plug and receptacle, replacement of any damaged parts, and incorporation of specific maintenance manual revisions into the aircraft's approved maintenance schedule.
Scope and Application
The Airworthiness Directive (AD) AD/DHC-2/32 issued by the Civil Aviation Safety Authority (CASA) under subregulation 39.1 (1) of the Civil Aviation Regulations 1998 applies specifically to all Model DHC-2 Mark I and Mark II aeroplanes. The directive is aimed at ensuring the airworthiness of these aircraft by addressing a safety concern identified by Transport Canada regarding the ignition system of DHC-2 series aeroplanes. The directive mandates that operators and owners of these aeroplanes perform a visual inspection of the firewall ignition plug and receptacle to verify proper lock wiring and security as per Bombardier Aerospace de Havilland Beaver Alert Service Bulletin A2/53, Revision 'A'. Any damaged parts identified during this inspection must be replaced before further flight, and the Maintenance Manual must be amended to incorporate Maintenance Manual PSM 1-2-2 Temporary Revision TR2-24. Compliance with these requirements must be achieved within specified timeframes following the effective date of the directive, which is 29 November 2001. This directive extends to the Commonwealth of Australia and is enforceable under the authority of the Civil Aviation Safety Regulations, with no stated exclusions or exemptions in the provided text.
Key Provisions
The Airworthiness Directive (AD) issued under subregulation 39.1 (1) of the Civil Aviation Regulations 1998 (CAR 1998) specifies the necessary actions to address an identified unsafe condition in the DHC-2 (Beaver) Series aeroplanes. This directive, numbered AD/DHC-2/32, mandates specific actions to ensure the airworthiness of the aircraft, particularly focusing on the magneto cannon plug. The AD applies to all Model DHC-2 Mark I and Mark II aeroplanes. The main requirements outlined in the directive are: a visual inspection of the firewall ignition plug and receptacle for proper lock wiring and security in accordance with Bombardier Aerospace de Havilland Beaver Alert Service Bulletin A2/53, Revision ‘A’ (Requirement 1); replacement of any damaged parts identified during the inspection (Requirement 2); and incorporation of Maintenance Manual PSM 1-2-2 Temporary Revision TR2-24 into the periodic inspection of the aircraft (Requirement 3). The compliance section stipulates deadlines for these actions, with Requirement 1 needing to be completed within 3 months or 110 hours of service after the directive's effective date, whichever occurs first; Requirement 2 must be completed before further flight after the initial inspection; and Requirement 3 must be fulfilled within 3 months of the directive's effective date.
The AD imposes specific obligations on the owners and operators of DHC-2 (Beaver) Series aeroplanes. These obligations include conducting a thorough visual inspection of the firewall ignition plug and receptacle to ensure that they are properly secured with lock wiring as per the specified service bulletin. Additionally, any damaged parts identified during this inspection must be replaced immediately. Furthermore, the Maintenance Manual PSM 1-2-2 Temporary Revision TR2-24 must be integrated into the aircraft’s approved maintenance schedule. These obligations are intended to prevent the recurrence of unsafe conditions that could compromise the aircraft’s airworthiness.
Failure to comply with the provisions of this Airworthiness Directive may result in civil or criminal consequences. While the specific penalties are not detailed in the text, non-compliance with such directives typically results in enforcement actions by the Civil Aviation Safety Authority (CASA). This may include fines, grounding of the aircraft until compliance is achieved, or other administrative measures. Additionally, in severe cases, criminal charges could be pursued, particularly if non-compliance leads to safety incidents or accidents. The directive underscores the importance of adhering to these requirements to ensure the continued safety and airworthiness of the DHC-2 (Beaver) Series aeroplanes.