AD/SF340/36 - Sensor Loops

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the airworthiness of aircraft through the issuance of airworthiness directives. Enacted by the Australian Parliament, these regulations aim to ensure that civil aircraft meet the required safety standards and are maintained in a condition that allows safe operation. The directives are designed to address specific safety concerns and rectify any identified deficiencies in aircraft operations. In this instance, Airworthiness Directive AD/SF340/36 pertains to the Saab SF340 series aeroplanes, mandating compliance with Saab Service Bulletin 340-36-006. This directive was introduced to rectify an issue where the failure to relocate sensor loops could lead to undetected bleed air system hot air leaks, potentially causing structural damage to the fuselage skin over time. The policy objective is to ensure the continued airworthiness and safety of these aircraft by implementing necessary corrective actions. This legislative instrument underscores the importance of adhering to manufacturer-specific service bulletins and airworthiness directives to maintain the integrity and safety of civil aviation. By referencing the Swedish Airworthiness Directive SAD No. 1-054, which supersedes earlier directives, the regulation aligns with international safety standards and best practices. The requirement for compliance prior to 1 January 1993 highlights the urgency and critical nature of the addressed safety issue, ensuring that all affected aircraft are modified to prevent potential hazards.

Scope and Application

The Civil Aviation Regulations 1998, specifically under PART 39 - 105, address the application of airworthiness directives for Saab SF340 Series aeroplanes, with particular focus on the sensor loops as outlined in AD/SF340/36. This legislation applies to all Saab SF340 aeroplanes with serial numbers ranging from SF340A-004 through 159 and SF340B-160 through 339, inclusive. The primary requirement is to ensure compliance with SAAB Service Bulletin 340-36-006, which replaces and cancels the previous SAAB Service Bulletin 340-36-005. Swedish Airworthiness Directive SAD No. 1-054 also supersedes SAD No. 1-053, indicating international alignment in safety standards. The directive mandates that these actions be completed before 1 January 1993 to prevent potential issues such as bleed air system hot air leaks, which, if undetected, could lead to a reduction in structural integrity and damage to the fuselage skin.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, outlines a critical airworthiness directive pertaining to the Saab SF340 series aeroplanes. This directive, identified as AD/SF340/36, mandates actions concerning the sensor loops (section 11/92). It applies to all Saab SF340 aircraft with serial numbers ranging from SF340A-004 to 159 and SF340B-160 to 339. The directive requires compliance with Saab Service Bulletin 340-36-006, which supersedes the previous bulletin 340-36-005. Additionally, it references and supersedes Swedish Airworthiness Directive SAD No. 1-054, which in turn cancels SAD No. 1-053. The primary requirement of this directive is that all affected aircraft must undergo the actions specified in Saab Service Bulletin 340-36-006 to address the issue of sensor loop relocation. This action is imperative to prevent the risk of a bleed air system hot air leak going undetected. Such a leak, if unaddressed, could lead to significant structural issues, such as damage or disbonding of the fuselage skin, thereby reducing the aircraft’s overall structural integrity. The obligations imposed by this airworthiness directive are clear: operators of the affected Saab SF340 aircraft must ensure that the sensor loops are relocated as specified in the relevant service bulletin. This is a mandatory requirement to maintain the airworthiness of the aircraft and ensure safety standards are met. Failure to comply with this directive could result in serious safety implications, as the risk of undetected leaks and subsequent structural damage could compromise the aircraft’s operational safety. In the event of non-compliance with this directive, the consequences can be severe. While the specific civil or criminal penalties are not detailed in the text, non-compliance with airworthiness directives generally carries significant penalties. These may include fines, penalties, and potential grounding of the aircraft until compliance is achieved. Given the critical nature of the directive, regulatory authorities are likely to enforce stringent measures to ensure adherence, reflecting the high importance placed on the structural integrity and safety of the aircraft in question.