AD/SD3-30/5 - Aileron, Pilots Handwheel Stop - Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, form a crucial part of the regulatory framework governing aviation safety in Australia. Part 39 of these regulations addresses Airworthiness Directives, which are legally binding requirements aimed at ensuring that aircraft are maintained in a safe condition for operation. Specifically, the Short SD3-30 Series Aeroplanes AD/SD3-30/5 pertains to the modification of the aileron pilots handwheel stop, addressing a safety concern identified during flight testing of certain SD 3-30 aircraft models. This directive was introduced to mitigate the risk of the aircraft being marginally below the required VMCL rate of roll in specific low weight configurations, thereby ensuring compliance with safety standards and protecting passengers and crew. The policy objective behind issuing these Airworthiness Directives is to ensure that aircraft remain airworthy and safe for operation by mandating specific maintenance actions. The directive on the aileron pilots handwheel stop modification for the SD 3-30 series aircraft was introduced to rectify a marginal safety issue that could potentially compromise the aircraft's performance and safety. Compliance with these directives is mandatory, and failure to adhere to the specified timeframes and modifications can result in the aircraft being deemed unairworthy.

Scope and Application

The Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, specifically AD/SD3-30/5, pertains to a series of Short SD 3-30 aircraft with serial numbers ranging from SH 3002 to SH 3078, which are equipped with PT6A-45R engines. This directive mandates specific modifications to the aileron, pilots handwheel stop to address safety concerns identified during flight testing. These aircraft must comply with the directive unless the required modifications have already been completed, and they must do so within 400 hours of time in service after 31 January 1981. The directive is a part of the overarching Civil Aviation Regulations 1998 and is enforceable under Commonwealth law, thus extending its applicability across all states and territories of Australia. No exclusions, exemptions, or thresholds are specified within the text of this directive, but it may be subject to further interpretation or clarification through subordinate instruments issued by CASA.

Key Provisions

The main operative sections of this legislative instrument pertain to the modification of the aileron, pilots handwheel stop on specific SD 3-30 aircraft. Section (1) of the AD/SD3-30/5 mandates that the specified aircraft with particular serial numbers and fitted with PT6A-45R engines must undergo a modification to the aileron, pilots handwheel stop. This requirement is outlined in Shorts SB No. SD3-27-23 and is identified as Modification No. 6255. The directive states that this modification must be completed unless it has already been accomplished. The compliance time frame is clearly defined, requiring the modification to be completed within 400 hours of time in service after 31 January 1981. The obligations imposed by this legislation are quite specific and revolve around the maintenance and compliance requirements for the affected aircraft. Operators of the SD 3-30 aircraft with the specified serial numbers and engine types must ensure that the aileron, pilots handwheel stop is modified as per the directive. This involves not only the physical modification of the aircraft but also the adherence to the stipulated timeframe for compliance. Operators are required to maintain records that demonstrate compliance with the AD/SD3-30/5 directive to ensure they meet the regulatory standards set forth by the Civil Aviation Safety Authority. Failure to comply with the provisions of AD/SD3-30/5 can result in significant legal and financial consequences. The Civil Aviation Regulations 1998 outline potential penalties for non-compliance with airworthiness directives. While the specific penalties are not detailed in the legislative instrument, the general provisions of the Civil Aviation Act 1988 provide for substantial fines and other penalties. Civil penalties can include fines up to a significant amount, while criminal penalties may involve imprisonment for breaches of safety regulations. Non-compliance can also result in the grounding of the aircraft, which can have severe operational and financial repercussions for the operator.