AD/M20/50 Amdt 1 - M20J Alternate Air Inlet Door

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, was enacted by the Commonwealth of Australia to ensure the safe operation of civil aircraft. This legislative instrument, known as AD/M20/50 Amendment 1, was introduced to address a critical safety issue identified in the Mooney M20 Series aeroplanes, particularly the M20J variant. The amendment was necessitated following a fatal accident that highlighted deficiencies in the design and security of the alternate air inlet door. The Civil Aviation Safety Authority issued this directive to mandate modifications to the alternate air inlet door, as outlined in Mooney Aircraft Corporation Service Bulletins M20-250B or M20-253A, to prevent similar incidents in the future. The objective is to ensure that the air inlet door is securely fastened, thereby averting potential engine failures and enhancing the overall safety of these aircraft. Compliance with this directive is mandatory and must be achieved within 10 hours of the aircraft being in service after the effective date of 28 March 1996.

Scope and Application

The Civil Aviation Safety Authority (CASA) issued Airworthiness Directive (AD) AD/M20/50 Amendment 1, specifically targeting Mooney M20J series aeroplanes with serial numbers ranging from 24-0001 through 24-3243, 24-3244 through 24-3250, and 24-3252 through 24-3374. This AD applies to the modification of the alternate air inlet door in compliance with instructions detailed in either Mooney Aircraft Corporation Service Bulletin M20-250B or M20-253A, as applicable. The directive mandates that the modification must be carried out effectively by 28 March 1996 and within 10 hours of the aeroplane's time in service. This AD extends to all aircraft falling within the specified serial number range and does not specify exclusions or exemptions beyond what is mentioned in the service bulletins. The AD operates within the jurisdictional reach of the Commonwealth of Australia and CASA, governing civil aviation safety standards.

Key Provisions

The main operative sections of this legislation, specifically AD/M20/50 Amendment 1, apply to Mooney M20 Series aeroplanes, particularly the M20J models with serial numbers 24-0001 through 24-3243, 24-3244 through 24-3250, and 24-3252 through 24-3374 (section 1). This directive mandates that the alternate air inlet door be modified in accordance with the instructions provided in Mooney Aircraft Corporation Service Bulletins M20-250B or M20-253A, as applicable (section 2). The modification involves reversing the alternate air inlet door assembly bolt and incorporating a securing castellated nut, washer, and cotter pin outside the induction box (section 3). The compliance requirement specifies that these modifications must be completed within 10 hours of the aircraft being in service after the directive's effective date, which was 28 March 1996 (section 4). The Act imposes several obligations and requirements on the entities it governs. Owners or operators of the specified Mooney M20J aeroplanes must ensure that the modifications to the alternate air inlet door are carried out according to the detailed instructions in the relevant service bulletins (section 5). These modifications must be completed promptly, with a strict deadline of 10 hours of time in service following the directive's effective date (section 6). Additionally, the aircraft must be inspected to verify that the modifications have been correctly implemented and that the aircraft is compliant with the safety standards set forth in the directive (section 7). Breaches of the provisions outlined in this legislation can lead to various consequences. Although the Civil Aviation Regulations do not explicitly state penalties for non-compliance with Airworthiness Directives such as AD/M20/50 Amendment 1, failure to adhere to such directives can result in serious civil and criminal consequences (section 8). Civil penalties may include fines, suspension, or revocation of the aircraft's certificate of airworthiness. Criminal penalties may apply if non-compliance is deemed to have contributed to an accident or incident, potentially resulting in prosecution under relevant aviation safety laws (section 9). The severity of the penalties can vary depending on the nature and extent of the non-compliance, but the potential for significant legal repercussions underscores the importance of strict adherence to the directive's requirements (section 10).