AD/G159/37 - Main Landing Gear Uplock Beam Assembly - Inspection

Overview

The Civil Aviation Orders, enacted by the Commonwealth of Australia, serve to regulate and ensure the safety and efficiency of civil aviation within the country. Specifically, Part 105 of these Orders, under the purview of the Civil Aviation Safety Authority, includes the Schedule of Airworthiness Directives that mandate adherence to specific safety standards. One such directive, AD/G159/37, pertains to the inspection of the Main Landing Gear Uplock Beam Assembly for Gulfstream (Grumman) G.159 Series aeroplanes. This directive was introduced to address the problem of failures in the M.L.G. uplock beam assembly, which have been observed in overseas registered aeroplanes. The policy objective behind this directive is to ensure the reliability and safety of the landing gear system through regular inspections, thereby mitigating the risk of in-flight failures. Compliance with this directive is required at each daily or overnight inspection, and can be performed and certified by the pilot in command, as outlined in Gulfstream American Customer Bulletin No. 12.

Scope and Application

The Civil Aviation Orders, specifically the Airworthiness Directives under Part 105 Schedule, mandate rigorous safety measures for aviation operations within Australia. The directive AD/G159/37 pertains to all aircraft of the Gulfstream (Grumman) G.159 series, requiring detailed inspection of the main landing gear uplock beam assembly at each daily or overnight inspection. This ensures the safety and reliability of the aircraft, as documented in Gulfstream American Customer Bulletin No. 12. The directive applies to all operators of the specified aircraft models, encompassing both commercial and private aviation entities within Australian airspace. Notably, compliance with these inspections can be performed and certified by the pilot in command, ensuring that the safety standards are consistently met. The directive underscores the importance of proactive maintenance to prevent failures, particularly in light of incidents involving similar assemblies in overseas-registered aircraft. This regulation extends across the Commonwealth, affirming the commitment to maintaining high safety standards in civil aviation within Australia.

Key Provisions

The Civil Aviation Orders (CAO) Part 105, Schedule of Airworthiness Directives, specifically AD/G159/37, mandates that all Model G159 Gulfstream (Grumman) G.159 series aeroplanes must undergo an inspection of the main landing gear (MLG) uplock beam assembly (section 3/80). This inspection is required at each daily or overnight inspection (section 3/80). Notably, this inspection can be performed and certified by the pilot in command (section 3/80). The directive references Gulfstream American Customer Bulletin No. 12 for compliance details (section 3/80). The background information provided indicates that failures of the MLG uplock beam assembly have been observed in aeroplanes registered overseas (section 3/80). Entities governed by this directive must ensure that the MLG uplock beam assembly is inspected as mandated, adhering to the guidelines outlined in Gulfstream American Customer Bulletin No. 12. This includes performing the inspection at each daily or overnight inspection cycle. Additionally, the pilot in command has the authority to carry out and certify the inspection, ensuring compliance with the directive's requirements. Failure to comply with these inspection protocols may result in safety risks associated with the MLG uplock beam assembly, which has shown a history of failures in overseas-registered aeroplanes. Breaches of the provisions outlined in AD/G159/37 could lead to significant consequences. Non-compliance with the mandated inspections may result in the aeroplane being deemed unairworthy, potentially leading to grounding. The seriousness of the directive underscores the importance of adhering to the specified inspection protocols to prevent failures related to the MLG uplock beam assembly. While the specific civil or criminal penalties for non-compliance are not detailed in the provided text, the potential impact on aviation safety implies that violations could attract severe penalties under broader civil aviation laws.