Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, form a comprehensive framework for the regulation of civil aviation safety. This legislation was introduced to ensure that aircraft operations in Australia meet stringent safety standards, thereby protecting the public and maintaining the integrity of the national airspace. The regulations address various aspects of aviation safety, including airworthiness, licensing, and operational procedures. The Civil Aviation Safety Authority (CASA) administers these regulations, aiming to achieve the overarching policy objective of maintaining the highest possible level of safety in civil aviation. One specific legislative instrument under the Civil Aviation Regulations 1998 is the AD/CESSNA 170/60 directive issued in 1997. This directive targets the Cessna 170, 172, F172, FR172, and 175 series aeroplanes, focusing on the issue of potential fuel spillage due to chafing between the fuel strainer drain and the lower engine cowling. CASA issued this directive to mitigate the risk of fire hazards and engine stoppage, ensuring that specific model aircraft meet the necessary safety standards before further flight. Compliance with this directive is mandatory, requiring thorough inspections and modifications as specified, thereby enhancing overall aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the Airworthiness Directives for specific models of Cessna aircraft, including the 170, 172, F172, FR172, and 175 series aeroplanes. This particular directive, AD/CESSNA 170/60, applies to the Cessna 172R model aircraft with serial numbers ranging from 17280001 through 17280016, 17280018 through 17280040, 17280042 through 17280054, 17280056 through 17280076, and 17280080 through 172800819/97 DM. The directive mandates that these aircraft must undergo an examination of the fuel strainer assembly for any signs of leaks and inspect both the fuel strainer assembly and the exhaust tailpipe for any chafing with the lower engine cowling. If any chafing is detected, a modification of the lower engine cowl as per Cessna Service Bulletin SB97-28-01 dated June 6, 1997, must be carried out before further flight. Compliance with these requirements is essential, with the initial inspection and subsequent inspections mandated prior to any further flight until the required modifications are completed. Additionally, the modifications must be carried out within ten hours of the directive's effective date, which was 16 July 1997.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, specifically within Part 39 - 105 concerning the Cessna 170, 172, F172, FR172, and 175 series aeroplanes, focus on ensuring the airworthiness of specific models by addressing issues related to fuel strainer leaks and engine muffler tailpipe chafing. Under section 39-105(1), operators of affected aircraft must inspect the fuel strainer assembly and the exhaust tailpipe for any signs of chafing with the lower engine cowling. If any chafing is detected, the lower engine cowl must be modified as per Cessna Service Bulletin SB97-28-01 dated June 6, 1997, before further flight. This directive mandates that inspections and necessary modifications must be completed within 10 hours of the directive's effective date, which is 16 July 1997. Operators and owners of the specified Cessna 172R models with certain serial numbers must ensure compliance with these requirements. Compliance involves conducting a thorough inspection of the fuel strainer assembly and the exhaust tailpipe at each pre-flight inspection until the modification outlined in Requirement 2 is completed. This ongoing inspection requirement underscores the importance of maintaining airworthiness and preventing potential hazards such as fuel spillage, fire risks, or engine stoppage due to fuel loss. Operators must also ensure that all inspections and modifications are performed by qualified personnel and that any necessary records are maintained to demonstrate compliance. Failure to comply with these airworthiness directives can result in serious consequences. Under section 39-105(2), operators who do not adhere to these requirements risk significant penalties. The exact penalties are not specified within the text, but non-compliance with airworthiness directives can generally lead to enforcement actions, including fines and potential grounding of the aircraft. Furthermore, operating an aircraft that does not meet the prescribed airworthiness standards can have severe safety implications, potentially leading to accidents or incidents that could endanger lives and property. It is, therefore, crucial for operators to strictly follow the mandated inspection and modification procedures to avoid any legal repercussions and to ensure the safe operation of their aircraft.