Airworthiness Bulletins

CASR 21.114 Foreign STCs states: A certificate (however described) for an aircraft, aircraft engine or propeller that is issued by or for the NAA of a recognised country and is equivalent to a STC that could have been issued by CASA (a foreign STC)…

The subject of administration and control of aircraft welding and non-destructive testing (NDT) activities are aspects of maintenance that are not clearly understood by many people.

The purpose of this Bulletin is to recommend that Registered Operators and maintainers of Aerostar aircraft consider the need to continue performing some maintenance operations previously mandated by AD.

To highlight to agricultural aircraft operators the importance of ensuring the fatigue lives of any lifed aeronautical product or the aircraft is correctly calculated and recorded.

To clarify the items that form the aileron control cable system and the associated Instructions for Continuing Airworthiness (ICA)

Failure of Ground Power Unit (GPU) and APU thermocouples can cause failures of Air Turbine Starter drive shafts.

Alert operators, pilots and maintenance personnel regarding failures in new Teflon/stainless steel braided hydraulic hoses introduced by MOD 074239.

The purpose of this bulletin is to highlight to aircraft owners and maintainers, common issues encountered with alternators and starter/generators.

This AWB highlights known issues associated with Circuit Breakers (CB). There are recommendations for maintenance, installation and operation of CBs.

To alert maintenance personnel and operators to be vigilant whenever installing or adjusting any aircraft control system using the classic two cables in tension, closed–loop cable design, including primary flight control systems.

This purpose of this AWB is to outline and define the airworthiness requirements for fabric coverings used as alternate approved materials and processes.

This AWB provides a summary of regulations related to aviation fuel and provides answers to many frequently asked questions (FAQ)

To provide basic guidance on the maintenance and system functional checks of the vacuum system manifold valve which is found installed in twin engine aircraft with two engine-driven vacuum pumps and in single engine aircraft equipped with one engine…

CASA continues to receive reports describing serious safety issues including battery terminal separation, fire and explosion originating from the main battery and battery compartment or battery “box”.

Advise operators and maintainers of main undercarriage strut failures and provide a recommendation to prevent re-occurrences.

This AWB provides guidelines for procedures to be followed to ensure continued airworthiness of the engines that have exceeded the calendar time overhaul limits specified by the manufacturer. These guidelines are in addition to the recommendations by…

Inform aircraft operators on requirements for licencing for radio communication and navigation equipment

Alert all operators and maintainers of aircraft with passenger seats equipped with “D-ring” type seat belt anchor fittings that passenger seat belts with hook ends and spring-loaded keepers have the potential to inadvertently release from the…

The objective of this bulletin is to highlight to the maintainers, flight crew and operators the importance of meticulous inspection and maintenance of seats and seat adjustment mechanisms to prevent inadvertent operation of the seat, particularly…

For aircraft owners, operators, design persons and maintainers intending to incorporate enhanced security features in aircraft.

The purpose of this AWB is to provide information on the servicing tasks that may be carried out by, but not limited to, the pilot in command

To provide information to aircraft engineers and operators regarding detecting internal corrosion and fatigue cracking failures in typical aircraft tubular structures during periodic inspections.

This Airworthiness Bulletin sets out to provide general guidance and warnings on the subject of aircraft washing and cleaning and also serves as a reminder that any work carried out on an aircraft, including washing and cleaning, is required to be in…

An Airworthiness Bulletin (AWB) is issued to inform the aviation public, in a systematic way, of essential information not considered mandatory. The information contained in an AWB is for information only, and issued by CASA to disseminate…

The purpose of this Bulletin is to advise all aircraft owners, operators, maintenance organisations, manufacturers and parts distributors regarding the production and sale of non-conforming grease fittings.

The purpose of the AWB is to inform operators of a significant Main Rotor blade cracking event recently reported on an R22 Beta II helicopter fitted with A016-6 main rotor blades. This AWB is also published to gather more information on the extent of…

To provide information to the Australian Aviation Industry on a product that may be suitable for a wide range of maintenance tasks including cleaning Aircraft Oxygen Systems.

This AWB alerts owners and operators of Restricted Category aircraft which are derivative models of the Bell 206 to the need to assess whether Bell 206 Airworthiness Directives are applicable to their aircraft

Advise operators of the correct source of approved maintenance data and flight manuals for these helicopters.