COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes
AD/AC/51 Cabin Differential Pressure Limitations 10/73
Applicability: All model 690A with S/Nos. 11102 to 11107 and 11109 to 11116 not modified in accordance with SL No. 270.
Document: Aero Commander SB No. 125. Effective: 16 October 1973.
Overview
The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, aim to ensure the safety of civil aviation and the public. One aspect of these regulations is the establishment of Airworthiness Directives to address specific safety concerns related to particular aircraft models. For instance, AD/AC/51 focuses on cabin differential pressure limitations for certain Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes. This directive was introduced to tackle the problem of potential cabin pressure issues that could compromise the safety of the aircraft and its occupants. The policy objective behind these regulations is to mandate specific safety measures that aircraft manufacturers and operators must follow to maintain the airworthiness of their aircraft and ensure the safety of all individuals on board.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, including AD/AC/51 concerning cabin differential pressure limitations for Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600, and 700) series aeroplanes. This legislation applies to all model 690A aircraft with serial numbers ranging from 11102 to 11107 and from 11109 to 11116 that have not been modified according to Service Letter No. 270. The directive is intended to ensure the airworthiness and safety of these specific aircraft models by addressing cabin pressure limitations. The regulations are enforced by CASA and have a national jurisdictional reach across Australia, ensuring compliance by all relevant operators and entities involved in the maintenance and operation of the specified aircraft models. The directive excludes aircraft that have already been modified in accordance with Service Letter No. 270. Further specifications and details of compliance are outlined in Aero Commander Service Bulletin No. 125, which became effective on 16 October 1973.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes Airworthiness Directives (AD) that are critical for ensuring the safety of aircraft in Australian airspace. In this case, AD/AC/51 addresses the cabin differential pressure limitations for Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600, and 700) Series aeroplanes. This directive applies to all model 690A aircraft with serial numbers (S/Nos.) 11102 to 11107 and 11109 to 11116 that have not been modified in accordance with Service Letter (SL) No. 270. The directive became effective on 16 October 1973 and references Aero Commander Service Bulletin (SB) No. 125 for detailed information.
These provisions require aircraft operators to adhere to specific limitations on cabin differential pressure to ensure the safety of passengers and crew. The directive mandates that operators of the specified Twin Commander models must comply with the pressure limitations outlined in the referenced service bulletin. It is imperative that these aircraft are operated within the prescribed parameters to avoid potential safety hazards associated with excessive cabin pressure differentials.
Operators of the affected aircraft must ensure that they follow the instructions provided in Aero Commander SB No. 125. This includes conducting any necessary modifications or checks to ensure compliance with the AD/AC/51 requirements. Failure to adhere to these directives can result in the aircraft being deemed unairworthy, which can lead to grounding and potential enforcement actions.
Failure to comply with the AD/AC/51 directive can result in serious consequences. Operators who do not adhere to the cabin differential pressure limitations may face enforcement actions by the Civil Aviation Safety Authority (CASA). These actions can include fines, suspension of the aircraft’s certificate of airworthiness, or other regulatory penalties. The seriousness of the non-compliance and the potential penalties reflect the importance of adhering to these safety directives to maintain the highest standards of aviation safety in Australia.