COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety 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 revokes Airworthiness Directive (AD) AD/BN-2/75 Amdt 1 and issues the following AD under subregulation 39.1 (1) of CASR 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.
Pilatus Britten-Norman BN-2 Series Aeroplanes
AD/BN-2/75
Amdt 2
Turbine Engine Mounting Frame NB-20-6853 7/2004
Applicability: Model BN2T, BN2T-4R, and BN2T-4S aircraft, which have accumulated 1,000 total flight hours.
Requirement: Inspect in accordance with B-N Group Ltd. Service Bulletin SB 282 Issue 4.
Note: UK CAA AD 002-05-2002 refers.
Compliance: Unless the initial inspection is already accomplished, within 25 landings after 2 October 2003. Thereafter inspect as specified in the Requirement document.
The compliance time remains unchanged by this issue. This Amendment becomes effective on 8 July 2004.
Background: Cracking has been detected in the engine-mounting frame, in the welded area, where the diagonal beam attaches to the forward frame.
Amendment 1 introduced Modification NB/M/1741, mounting frame NB-20-9309. Amendment 2 introduces the latest revision of the Requirement document.
The original issue of the Airworthiness Directive became effective on 8 August 2002.
David Villiers
Delegate of the Civil Aviation Safety Authority 26 May 2004
The above AD is notified in the Commonwealth of Australia Gazette on 16 June 2004.
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Overview
The Civil Aviation Safety Regulations 1998 (CASR 1998) were enacted by the Parliament of Australia to ensure the safety of civil aviation within Australia. This legislation establishes the framework for the regulation of air navigation services, aircraft operations, and airworthiness standards. In response to identified safety issues, the Civil Aviation Safety Authority (CASA) can issue Airworthiness Directives (ADs) to address specific safety concerns. The ADs are intended to mandate corrective actions to rectify unsafe conditions, thereby enhancing the safety of aircraft and aeronautical products. The AD for Pilatus Britten-Norman BN-2 Series Aeroplanes, specifically addressing the turbine engine mounting frame, is one such directive issued under the authority of the CASR 1998. This directive was introduced to address the problem of cracking detected in the engine-mounting frame of BN-2T, BN-2T-4R, and BN-2T-4S aircraft, particularly at the welded area where the diagonal beam attaches to the forward frame. The policy objective is to ensure that these aircraft are maintained in a safe and airworthy condition, thereby preventing potential in-flight failures and enhancing overall aviation safety.
Scope and Application
The Civil Aviation Safety Regulations 1998 (CASR 1998) govern aviation safety standards and requirements across Australia, applying to all aviation activities and entities operating within the Commonwealth. Specifically, Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives mandates the issuance of Airworthiness Directives (AD) by the Civil Aviation Safety Authority (CASA) to address any unsafe conditions identified in aircraft or aeronautical products. AD/BN-2/75 Amdt 2 pertains to Pilatus Britten-Norman BN-2 Series Aeroplanes, specifically the BN2T, BN2T-4R, and BN2T-4S models that have accumulated 1,000 total flight hours. The directive requires an inspection of the turbine engine mounting frame according to B-N Group Ltd. Service Bulletin SB 282 Issue 4, unless the initial inspection has already been completed, in which case inspections must follow the schedule specified in the Requirement document. The directive mandates compliance within 25 landings after 2 October 2003, with no change to the initial compliance time. The amendment became effective on 8 July 2004 and was notified in the Commonwealth of Australia Gazette on 16 June 2004.
Key Provisions
The Civil Aviation Safety Regulations 1998, specifically Part 39 - 105, outlines the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. This particular Airworthiness Directive (AD) pertains to Pilatus Britten-Norman BN-2 Series Aeroplanes, specifically the model BN2T, BN2T-4R, and BN2T-4S aircraft that have accumulated 1,000 total flight hours (39.1). The AD mandates that inspections be conducted in accordance with B-N Group Ltd. Service Bulletin SB 282 Issue 4. This requirement is necessitated by the detection of cracking in the engine-mounting frame, particularly in the welded area where the diagonal beam attaches to the forward frame (Applicability and Requirement). The compliance section stipulates that if the initial inspection has not already been accomplished, it must be conducted within 25 landings after 2 October 2003, with subsequent inspections to follow the specifications outlined in the Requirement document (Compliance).
Entities governed by this AD, such as aircraft operators and maintenance providers, are obligated to conduct the required inspections as per the Service Bulletin SB 282 Issue 4. These inspections must be performed on the BN2T, BN2T-4R, and BN2T-4S aircraft that have reached the milestone of 1,000 total flight hours. The directive further mandates that these inspections are to be carried out meticulously to ensure the structural integrity of the engine-mounting frame is maintained. Failure to comply with these requirements may result in serious safety implications, potentially rendering the aircraft non-airworthy.
The AD also incorporates previous amendments and updates, such as Modification NB/M/1741 and mounting frame NB-20-9309, introduced in Amendment 1. The latest amendment, Amendment 2, revises the Requirement document and was issued on 8 July 2004, effective from the same date (Background). This directive serves to rectify an identified unsafe condition, ensuring the continued safety and airworthiness of the specified aircraft models.
Failure to comply with the provisions of this AD may result in significant legal and safety repercussions. Civil and criminal penalties may be imposed for non-compliance, reflecting the importance of adhering to these safety directives. The specific penalties are not detailed within the AD itself but are generally governed by broader aviation safety regulations and can include fines, enforcement actions, and potential grounding of non-compliant aircraft. The overarching aim is to maintain the highest standards of aviation safety and prevent any unsafe conditions that could compromise the integrity of the aircraft or endanger lives.