AD/CESSNA 400/60 Amdt 1 - Main Landing Gear Trunnion - Inspection

Overview

The Civil Aviation Regulations 1998, as amended by F2006B08346, were enacted by the Commonwealth of Australia to ensure civil aviation safety and address specific issues related to aircraft airworthiness. This particular legislative instrument focuses on the Cessna 400 series aeroplanes, specifically addressing a safety concern identified with the main landing gear trunnion of certain models. The problem this legislation targets is the in-service cracking of the main landing gear trunnion which could potentially compromise the safety of these aircraft. The regulation mandates inspections of the affected aircraft to ensure the integrity of the landing gear trunnion, thus maintaining the safety standards required by the Civil Aviation Safety Authority. The policy objective behind this legislation is to mandate periodic inspections and, where necessary, modifications to the main landing gear trunnion of specified Cessna 400 series aeroplanes to mitigate the risk of in-service cracking. This is achieved by requiring inspections after the aircraft has accumulated 300 hours of service time and at intervals not exceeding 50 hours thereafter until modifications are made. This regulation is a direct response to documented safety issues, ensuring that the aircraft continue to meet the stringent safety standards required for civil aviation operations within Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, outlines the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives, which applies to certain models of Cessna 400 series aeroplanes. This particular directive, AD/CESSNA 400/60 Amendment 1, mandates an inspection of the main landing gear trunnion for all models 402 with serial numbers ranging from 402C0001 to 402C0039, all models 414 with serial numbers from 414A0001 to 414A0235, and all models 421 with serial numbers from 421C0001 to 421C0638. The directive is applicable from the point when the aeroplanes achieve 300 hours of time in service and must be followed at intervals not exceeding 50 hours thereafter until modifications are made. This requirement arises from observed in-service cracking of the existing main landing gear trunnion, as documented in Cessna SIL ME 79-11. The regulations ensure that the specified aircraft models adhere to stringent safety standards to mitigate the risk of structural failure in the landing gear.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39 under the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, address the safety and maintenance requirements for certain Cessna 400 series aeroplanes. Section AD/CESSNA 400/60 Amendment 1 pertains to the inspection of the main landing gear trunnion on these aircraft. This directive applies to all Cessna 402 models with serial numbers 402C0001 to 402C0039, all Cessna 414 models with serial numbers 414A0001 to 414A0235, and all Cessna 421 models with serial numbers 421C0001 to 421C0638 (Section 6/80). The document that outlines these requirements is Cessna SIL ME 79-11. The key requirement of this directive is that the main landing gear trunnion must be inspected after the aircraft has accumulated 300 hours of time in service and then at intervals not exceeding 50 hours of time in service until the issue is addressed through modification (Section 6/80). The background provided indicates that there have been instances of in-service cracking of the main landing gear trunnion, which necessitates these stringent inspection requirements to ensure the continued airworthiness of the aircraft. Entities and parties governed by these regulations must adhere to the specified inspection intervals to ensure compliance. Owners and operators of the affected Cessna 400 series aeroplanes are required to ensure that the main landing gear trunnion is inspected as outlined in the directive. This involves meticulous record-keeping and adherence to the prescribed intervals to maintain compliance with CASA standards. Failure to comply with these airworthiness directives can result in serious consequences. Civil or criminal penalties may be imposed for non-compliance, depending on the severity and intent behind the breach. The specific penalties are not detailed within the legislative instrument but generally, non-compliance with CASA regulations can lead to fines, grounding of the aircraft, and in severe cases, criminal charges against the responsible parties. The maximum penalties for such offences are typically determined by the courts, taking into account the nature and impact of the breach on aviation safety.