AD/CESSNA 210/36 - Windshield And Windows - Fatigue Life Limitation

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, was enacted to ensure the safety of aircraft operations by regulating various aspects of civil aviation, including airworthiness directives. One such directive, AD/CESSNA 210/36, addresses the fatigue life limitations of the windshield and cabin windows for Cessna 210 series aeroplanes. This directive was introduced to mitigate risks associated with the structural integrity of these components, which can be compromised over time due to repeated pressurisation cycles. The Civil Aviation Safety Authority, under the authority of the Australian Parliament, established these requirements to ensure that the specified parts are retired from service before reaching critical fatigue thresholds, thereby maintaining the overall safety and airworthiness of the aircraft. The policy objective of AD/CESSNA 210/36 is to prevent potential structural failures due to fatigue, which could lead to catastrophic in-flight events. By mandating the retirement of the windshield and cabin windows after specific numbers of pressurised flights, the directive aims to proactively address degradation issues, ensuring that these components do not pose a risk to the aircraft's operational safety. This regulation is grounded in empirical data from fatigue tests conducted by the manufacturer, thereby providing a robust framework for maintaining the integrity of critical aircraft parts.

Scope and Application

The Civil Aviation Regulations 1998, under the authority of the Civil Aviation Safety Authority, apply to all P210 series aircraft within Australian jurisdiction. This legislation specifically addresses the fatigue life limitations of the windshields and cabin windows of these aircraft, as detailed in the Airworthiness Directive AD/CESSNA 210/36. The regulation mandates that the windshield must be retired from service upon or prior to the accumulation of 19,400 pressurised flights, and the cabin windows must be retired upon or prior to the accumulation of 12,000 pressurised flights. These limitations are derived from fatigue test data provided by the manufacturer to ensure the safety and airworthiness of the aircraft. The regulation applies nationally and is enforced through the Civil Aviation Safety Authority, with potential extensions or restrictions managed through subordinate instruments as required.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, establish critical safety requirements for the operation of Cessna 210 Series Aeroplanes. Section 39.105(AD/CESSNA 210/36) pertains to the fatigue life limitation of the windshield and cabin windows, which is detailed in the Airworthiness Directive issued on 5/79. This directive applies to all P210 series aircraft and outlines specific requirements to ensure the safety and airworthiness of these aircraft. Under this directive, the main operative sections (AD/CESSNA 210/36) require that the windshield of the aircraft must be retired from service upon or prior to the accumulation of 19,400 pressurised flights. Similarly, the cabin windows must be retired from service upon or prior to the accumulation of 12,000 pressurised flights. These requirements are based on fatigue test data provided by the manufacturer to ensure the structural integrity and safety of the aircraft over time. The obligations imposed by these provisions require aircraft operators and owners to comply strictly with the specified flight hour limitations. Operators must monitor and document the number of pressurised flights to ensure timely retirement of the windshield and windows as mandated. This involves detailed record-keeping and regular inspections to verify compliance with the flight hour limits. Failure to adhere to these requirements can lead to significant safety risks, as fatigued windshields and windows may fail during flight, potentially compromising the aircraft's structural integrity and the safety of all onboard. Failure to comply with the Airworthiness Directives set forth in AD/CESSNA 210/36 can result in severe consequences. Civil Aviation Regulations 1998 establish specific offences and penalties for non-compliance. Operators found in breach of these directives may face enforcement actions, including fines and potential grounding of the aircraft until the required repairs or replacements are made. The precise penalties and civil or criminal consequences depend on the severity and frequency of the non-compliance, but they are designed to enforce strict adherence to safety standards to protect all passengers and crew.