AD/Y12/3 - Fuselage Stringer 13 Between Frame 13 and 14

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 


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.

 

Harbin Y12 Series Aeroplanes

 

AD/Y12/3 Fuselage Stringer 13 Between Frame 13 and 14 3/2003

 

Applicability:  Model Y12 II aircraft, serial numbers up to and including 90 and 92. Requirement: Inspect in accordance with Harbin Aircraft Service Bulletin No. Y12-53-0059R1.

Note: China CAAC AD CAD95-Y012-03 refers.

 

Compliance: Initially, upon accumulating 2,000 flight hours. Thereafter, at intervals not to exceed 1,000 flight hours.

 

This Airworthiness Directive becomes effective on 20 March 2003.

 

Background: A report was received of cracking on fuselage stringer 13 and the skin between frames 13 and 14, and reinforced areas; on both sides of the fuselage.


 

David Alan Villiers

Delegate of the Civil Aviation Safety Authority 29 January 2003

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The above AD is notified in the Commonwealth of Australia Gazette on 26 February 2003.

 

 


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Overview

The Civil Aviation Regulations 1998 (CAR 1998), specifically Part 39, addresses various aspects of aircraft maintenance and safety standards, including the issuance of Airworthiness Directives (ADs) by the Civil Aviation Safety Authority (CASA). These directives aim to ensure the safety of aircraft and aeronautical products by mandating corrective actions to address identified unsafe conditions. For instance, AD/Y12/3 pertains to the Harbin Y12 Series Aeroplanes, specifically targeting the fuselage stringer 13 between frames 13 and 14. This directive was enacted in response to reports of cracking in the specified fuselage area, necessitating regular inspections to maintain airworthiness. The AD, effective from 20 March 2003, requires an initial inspection upon accumulating 2,000 flight hours, followed by inspections at intervals not exceeding 1,000 flight hours, as detailed in Harbin Aircraft Service Bulletin No. Y12-53-0059R1. This legislative measure underscores CASA's commitment to ensuring the safety and reliability of civil aviation operations.

Scope and Application

This legislative instrument pertains to an Airworthiness Directive issued under the Civil Aviation Regulations 1998 (CAR 1998) by the Civil Aviation Safety Authority (CASA). Specifically, the directive applies to the Harbin Y12 Series Aeroplanes, with particular attention to model Y12 II aircraft with serial numbers up to and including 90 and 92. The directive mandates an inspection procedure to be conducted in accordance with Harbin Aircraft Service Bulletin No. Y12-53-0059R1 to address reported cracking on fuselage stringer 13 between frames 13 and 14. This directive applies nationally across the Commonwealth of Australia and requires compliance from all relevant aircraft operators. The initial inspection is required upon accumulating 2,000 flight hours, with subsequent inspections to occur at intervals not exceeding 1,000 flight hours. This Airworthiness Directive was published in the Commonwealth of Australia Gazette on 26 February 2003 and became effective on 20 March 2003.

Key Provisions

The Civil Aviation Regulations 1998 (CAR 1998) include specific sections under which Airworthiness Directives (ADs) are issued. The Airworthiness Directive AD/Y12/3, issued under subregulation 39.1(1) of CAR 1998, pertains to the Harbin Y12 Series Aeroplanes, specifically model Y12 II aircraft with serial numbers up to and including 90 and 92. The directive requires that inspections be carried out on the fuselage stringer 13 between frames 13 and 14 in accordance with Harbin Aircraft Service Bulletin No. Y12-53-0059R1. This action is necessary to address the identified issue of cracking in the specified area, as referenced by China CAAC AD CAD95-Y012-03. The inspection must be completed initially after the aircraft accumulates 2,000 flight hours and subsequently at intervals not exceeding 1,000 flight hours. The AD imposes clear obligations on the parties involved, primarily the aircraft operators. They must ensure that the specified inspections are conducted as mandated by the directive. This involves adhering to the detailed instructions provided in the Harbin Aircraft Service Bulletin and potentially consulting with the Civil Aviation Safety Authority (CASA) or other authorised personnel to ensure compliance with the safety requirements. Failure to comply with these requirements could result in the aircraft being deemed unairworthy, thereby preventing it from operating until the necessary inspections and repairs are completed. Under CAR 1998, failure to adhere to the provisions of an Airworthiness Directive can lead to serious consequences. Specifically, non-compliance with AD/Y12/3 could result in civil or criminal penalties, depending on the severity and intent behind the breach. While the specific penalties are not detailed within the AD itself, under broader civil aviation regulations, breaches can lead to fines, enforcement actions, and potentially criminal charges for those responsible for the oversight of the aircraft. The maximum penalties could include substantial fines and imprisonment for individuals found guilty of deliberately disregarding safety directives.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.