AD/JETSTREAM/68 - Wings - Lower Surface at Landing Gear Bay

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, form the foundation of civil aviation regulation in the country, establishing safety standards and procedures to ensure the safety of air travel. One specific regulation within this framework is the Airworthiness Directive AD/JETSTREAM/68, which was introduced to address the identified problem of fatigue cracking in the wing lower surface at the outboard end of the main landing gear bay of British Aerospace BAe 3100 (Jetstream) Series Aeroplanes. This directive applies to all Jetstream 3200 Aircraft and requires regular inspections using high-frequency eddy current methods to detect potential fatigue cracks, thereby enhancing the safety and airworthiness of these aircraft. The policy objective behind this directive is to mitigate risks associated with structural integrity and ensure compliance with safety standards through proactive maintenance and inspection protocols. The Airworthiness Directive AD/JETSTREAM/68 is a legislative instrument that falls under the purview of the Civil Aviation Safety Authority (CASA), which is tasked with enforcing these safety regulations. The directive mandates an initial inspection before the aircraft reaches 10,000 landings or within 600 landings from 15 September 1994, whichever occurs last, followed by repeat inspections at intervals of 10,000 landings. This proactive approach aims to prevent potential structural failures by identifying and addressing fatigue cracks early, thereby ensuring the continued safety and reliability of Jetstream 3200 aircraft in Australian airspace.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, which govern the maintenance and safety standards for aircraft within Australia. This regulation applies to all Jetstream 3200 aircraft, ensuring that these aircraft meet the specified safety standards set forth by CASA. It mandates that inspections be carried out on the wing lower surface at the outboard end of the main landing gear bay to detect any fatigue cracking. This inspection must be conducted using high-frequency eddy current methods, in accordance with British Aerospace Service Bulletin 57-JA 930640 Revision 1 Appendix A. The initial inspection is required before the aircraft reaches 10,000 landings or within 600 landings from 15 September 1994, whichever occurs last, with subsequent inspections mandated at intervals of 10,000 landings. This directive extends across the Commonwealth, ensuring uniformity in compliance with aviation safety standards throughout Australia. No exclusions, exemptions, or thresholds are specified within the text of this directive, but the application may be further detailed or modified through subordinate instruments issued by CASA.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39 - 105 under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, mandate the inspection of certain British Aerospace BAe 3100 (Jetstream) Series Aeroplanes to ensure their continued airworthiness. One such directive, AD/JETSTREAM/68, applies to all Jetstream 3200 aircraft and pertains to the inspection of the wing lower surface at the outboard end of the main landing gear bay for fatigue cracking (section 105). This inspection must be carried out using high frequency eddy current methods in accordance with British Aerospace SB 57-JA 930640 Revision 1 Appendix A. The purpose of this directive is to detect and prevent potential structural failure due to fatigue cracking, thereby ensuring the safety of the aircraft during operation. Operators of Jetstream 3200 aircraft are obligated to comply with these inspection requirements. The initial inspection must be conducted before the aircraft accumulates 10,000 landings or within 600 landings from 15 September 1994, whichever is later. Subsequent inspections must be repeated at intervals of 10,000 landings. These inspections are critical to maintaining the structural integrity of the aircraft and ensuring continued compliance with safety standards set forth by the Civil Aviation Safety Authority. The directive also references CAA (UK) AD 004-09-03, which provides additional context and regulatory alignment with UK aviation safety standards. Failure to comply with the inspection requirements stipulated in AD/JETSTREAM/68 can result in significant consequences. Non-compliance may lead to the aircraft being deemed unairworthy, potentially resulting in grounding of the aircraft until the required inspections are performed and any necessary repairs are made. In severe cases, non-compliance with airworthiness directives can lead to enforcement actions by the Civil Aviation Safety Authority, including fines, penalties, and legal action against the aircraft operator. The maximum penalties for such violations can include substantial financial fines and, in some cases, imprisonment for individuals found to be in breach of these regulations. These measures are in place to ensure that all parties involved in the operation of the aircraft adhere to the highest safety standards to protect both passengers and crew.