AD/G1159/9 - Fuselage Aft Pressure Dome - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, specifically within Part 39 - 105, addresses the safety requirements for aircraft through the issuance of Airworthiness Directives. The Civil Aviation Safety Authority (CASA) is the body responsible for enacting these regulations, which are aimed at ensuring that aircraft meet the necessary safety standards to operate in Australian airspace. AD/G1159/9, introduced to address issues related to the fuselage aft pressure dome of Gulfstream (Grumman) G1159 and G-IV series aeroplanes, was enacted to enhance the structural integrity and safety of these aircraft models. This directive applies to all models with serial numbers from 3 to 125 and requires inspections and modifications to be conducted within 100 hours of time in service following 31 October 1973, in accordance with Grumman Customer Bulletin No. 167. The policy objective behind this regulation is to mitigate potential safety risks associated with the identified issue, thereby safeguarding the passengers, crew, and the general public.

Scope and Application

The Civil Aviation Safety Authority (CASA) has issued Airworthiness Directive AD/G1159/9, which applies specifically to Gulfstream (Grumman) G1159 and G-IV Series aeroplanes with serial numbers (S/Nos.) ranging from 3 to 125. This directive mandates an inspection and, where necessary, modification of the fuselage aft pressure dome, ensuring compliance with the requirements outlined in Grumman Customer Bulletin No. 167. The directive applies to all aircraft models within the specified serial number range and requires compliance within 100 hours of time in service after 31 October 1973. This legislation is part of the overarching Civil Aviation Regulations 1998, which are enforced under the authority of the Commonwealth of Australia, thereby extending its jurisdictional reach across the nation. No exclusions, exemptions, or thresholds are explicitly mentioned in the directive itself, but the application and enforcement of these regulations can be further extended or detailed through subordinate instruments as deemed necessary by CASA.

Key Provisions

The main operative sections of this legislation, specifically AD/G1159/9, pertain to the inspection and modification of the fuselage aft pressure dome on Gulfstream (Grumman) G1159 and G-IV series aeroplanes with serial numbers ranging from 3 to 125. This directive applies to all aircraft of these models that have accumulated 100 hours of time in service after 31 October 1973. The requirement is to follow Grumman Customer Bulletin No. 167, which provides detailed instructions for the inspection and any necessary modifications to ensure the structural integrity and safety of the affected aircraft components. Compliance with this directive is mandatory and must be achieved within the specified timeframe. The obligations imposed by this legislation are clear and specific. Owners and operators of Gulfstream (Grumman) G1159 and G-IV series aeroplanes within the defined serial number range must ensure that the inspection and modification of the fuselage aft pressure dome is carried out in accordance with the instructions provided in Grumman Customer Bulletin No. 167. This involves conducting a thorough inspection to identify any issues and making any necessary modifications to maintain the aircraft's airworthiness. The compliance must be achieved within 100 hours of time in service after the specified date of 31 October 1973. Failure to comply with these requirements could result in significant safety risks and legal consequences. Failure to comply with the provisions of this legislation can lead to severe civil and criminal consequences. The Civil Aviation Safety Authority (CASA) can impose fines and penalties for non-compliance. The maximum penalty for contravening these airworthiness directives is generally substantial, reflecting the critical nature of ensuring the safety of civil aviation. Non-compliance may also result in the grounding of the aircraft until the required inspections and modifications are performed, which can have significant operational and financial implications for the aircraft owners and operators. Additionally, repeated non-compliance or severe breaches may result in more severe penalties, including potential criminal charges and prosecution.