AD/G159/4 - Main Landing Gear Retract Cylinder Attach Fitting - Inspection and Modification

Overview

The Civil Aviation (Airworthiness) Regulations 1988, under the authority of the Civil Aviation Act 1988, were introduced to ensure that aircraft operated within Australian airspace meet safety standards that protect the public and promote efficient and orderly development of civil aviation. The Civil Aviation Safety Authority, as the body responsible for enforcing these regulations, established specific directives to address particular safety concerns related to certain aircraft models. One such directive is the Civil Aviation Safety Authority Order 2017 (CASAO), which amends the Civil Aviation (Airworthiness) Regulations 1988 to incorporate stricter safety measures for the Gulfstream (Grumman) G.159 series aeroplanes. This particular order targets the inspection and modification of the main landing gear retract cylinder attach fitting, as outlined in AD/G159/4, in response to documented issues with the structural integrity of these components. The policy objective of CASAO is to ensure the continued airworthiness of the Gulfstream (Grumman) G.159 series aeroplanes by mandating specific maintenance actions and inspections to prevent potential failures that could lead to accidents. By aligning with international safety standards, such as those set by the Federal Aviation Administration, CASAO demonstrates Australia's commitment to maintaining high safety benchmarks in its aviation sector. The order applies to all Gulfstream (Grumman) G.159 series aeroplanes with serial numbers 1 to 118, referencing Grumman Customer Bulletin No. 172 and FAA AD 63-21-2 for compliance guidance.

Scope and Application

The Civil Aviation Orders (CAO) under the Civil Aviation Safety Authority (CASA) specifically pertain to the airworthiness directives for the Gulfstream (Grumman) G.159 Series aeroplanes, as outlined in Part 105 Schedule of Airworthiness Directives. AD/G159/4, which addresses the Main Landing Gear Retract Cylinder Attach Fitting, applies to all Gulfstream G.159 Series aeroplanes with serial numbers ranging from 1 to 118. This directive mandates a comprehensive inspection and potential modification of the specified component to ensure continued airworthiness and safety, as referenced in Grumman Customer Bulletin No. 172 or FAA AD 63-21-2. The application of these directives extends across the Commonwealth of Australia, imposing regulatory compliance obligations on aircraft operators, maintenance organisations, and other relevant entities within the specified serial number range. Exclusions, exemptions, or thresholds are not explicitly detailed in the directive itself, but adherence to the referenced bulletins and directives ensures conformity with the regulatory standards set by CASA.

Key Provisions

The primary operative sections of the Civil Aviation Orders (CAO) Part 105 Schedule of Airworthiness Directives for Gulfstream (Grumman) G.159 series aeroplanes, specifically AD/G159/4, detail the requirements for inspecting and modifying the main landing gear retract cylinder attach fitting. This directive applies to all aircraft within the specified serial number range (S/Nos. 1 to 118). The relevant guidance documents for compliance are Grumman Customer Bulletin No. 172 and FAA AD 63-21-2. Essentially, these sections mandate that the specified aircraft undergo inspection and, if necessary, modification of the main landing gear retract cylinder attach fitting to ensure continued airworthiness. The obligations imposed by this directive are comprehensive and require adherence to the specified inspection and modification protocols. Operators of the affected aircraft must ensure that the inspection and modification are carried out by appropriately qualified personnel. This includes conducting a thorough visual inspection to identify any signs of wear, damage, or other defects in the main landing gear retract cylinder attach fitting. If any issues are found, the fitting must be modified or replaced as per the instructions provided in the referenced documents. Furthermore, operators must maintain accurate records of all inspections and any modifications performed, including dates and the signatures of the personnel involved. Failure to comply with the provisions of AD/G159/4 may result in serious consequences. The Civil Aviation Safety Authority (CASA) can take enforcement action against operators who do not adhere to these requirements. Civil penalties may be imposed for non-compliance, including fines that can be substantial. Additionally, continued operation of an aircraft that does not meet the airworthiness standards set out in this directive could lead to grounding of the aircraft until the required inspections and modifications are completed. In more severe cases, CASA may pursue criminal charges against individuals responsible for the non-compliance, which could result in fines and imprisonment. It is crucial for operators to take these obligations seriously to avoid these potential penalties and ensure the continued safety of their operations.