AD/MU-2/25 Amdt 2 - Flap Control System Torque Tube Assembly Joint

Overview

The Civil Aviation Regulations 1998 (Cth), as amended by the Mitsubishi MU-2 Series Aeroplanes AD/MU-2/25 Amendment 2, was enacted to address specific safety concerns related to the flap control system torque tube assembly joint in Mitsubishi MU-2 Series aeroplanes. This legislative instrument was introduced by the Civil Aviation Safety Authority (CASA) under the authority of the Civil Aviation Act 1988 (Cth) to ensure the continuing airworthiness of these aircraft by mandating regular inspections and, where necessary, modifications to the flap control system torque tube assembly joint. The overarching policy objective is to enhance flight safety by mitigating the risk of structural failure in this critical component, thereby preventing potential catastrophic in-flight incidents. Compliance with these airworthiness directives is essential for operators to maintain the operational safety standards required by Australian aviation regulations.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, which pertains to the Civil Aviation Safety Authority Schedule of Airworthiness Directives, governs the airworthiness of Mitsubishi MU-2 series aeroplanes. This legislation applies to all models within the specified series, mandating compliance with airworthiness directives to ensure the safety and reliability of the aircraft in operation. The requirements detailed under AD/MU-2/25 Amendment 2 necessitate actions in accordance with Mitsubishi Service Bulletins No 189A or SB No 067/27-008, depending on the aeroplane's serial number. The legislation requires an initial inspection to be conducted prior to the component reaching 4000 hours of service time, or within 100 hours of service time following 1 November 1990, whichever is later. Subsequent inspections must be carried out at intervals not exceeding 100 hours of service time. The legislation further acknowledges Japan Civil Aviation Bureau AD No TCD-2252-1-87, indicating a broader international context for the safety measures. Compliance with the applicable Service Bulletins constitutes a terminating action for these inspection requirements. The regulations are comprehensive, extending their reach to ensure the ongoing safety of Mitsubishi MU-2 aeroplanes through regular inspections and appropriate modifications.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, which pertains to the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, outlines specific requirements for maintaining the airworthiness of Mitsubishi MU-2 series aeroplanes. The relevant Airworthiness Directive (AD) in question is AD/MU-2/25 Amendment 2, which focuses on the flap control system torque tube assembly joint (10/90). This directive applies to all models of Mitsubishi MU-2 series aeroplanes (AD/MU-2/25 Amendment 2). The primary requirement is to take action in accordance with Mitsubishi Service Bulletin (SB) No 189A or SB No 067/27-008, depending on the aeroplane's serial number. For compliance, operators and maintenance personnel must initially inspect the flap control system torque tube assembly joint before the component exceeds 4000 hours of time in service or within 100 hours of time in service after 1 November 1990, whichever is the later date. Following this initial inspection, subsequent inspections must be conducted at intervals not exceeding 100 hours of component time in service. It is crucial to note that modifications in line with the applicable Requirement document will terminate the need for further inspections under this directive. The directive references Japan Civil Aviation Bureau AD No TCD-2252-1-87 for additional context. Operators and maintenance personnel governed by this directive must ensure that the specified inspections are conducted in a timely and compliant manner. Failure to adhere to the outlined inspection intervals or to implement the necessary modifications could result in the aeroplane being considered unairworthy. The obligation to comply with the Mitsubishi SBs and the CASA AD is paramount to maintaining the safety and airworthiness standards of the Mitsubishi MU-2 series aeroplanes. Non-compliance with these requirements could lead to enforcement actions by CASA, including potential grounding of the aircraft until the necessary inspections and modifications are performed. Breaching the requirements set forth in AD/MU-2/25 Amendment 2 could lead to civil or criminal consequences, depending on the severity and intent of the non-compliance. Under the Civil Aviation Act 1988, operators and maintenance personnel may face penalties for failing to comply with airworthiness directives. The maximum penalties can include substantial fines and, in severe cases, imprisonment. CASA has the authority to enforce these regulations and may take action against non-compliant operators, which can have significant operational and financial repercussions. Ensuring adherence to these directives is essential to avoid such penalties and to maintain the highest safety standards in civil aviation.