AD/PFP/2 Amdt 1 - Sensenich Propellers - Hub Inspection

Overview

The Civil Aviation Regulations 1998 (Cth), amended by the Civil Aviation (Airworthiness) Amendment (Propellers - Fixed Pitch) Instrument 2006, was enacted to enhance aviation safety by providing detailed airworthiness directives for propellers, specifically addressing issues related to fixed pitch propellers. The regulations aim to ensure that fixed pitch propellers, such as the Sensenich model M74DM, are maintained to high safety standards to prevent in-service failures. The legislation was introduced by the Australian Commonwealth Parliament and is administered by the Civil Aviation Safety Authority (CASA), which oversees the implementation of these directives to maintain the safety and reliability of aircraft operations. The policy objective is to minimise the risk of propeller failure by mandating regular inspections and maintenance at specified intervals, as outlined in the Sensenich Service Bulletin No. R-8, ensuring that the propellers remain airworthy and safe for continued use.

Scope and Application

The Civil Aviation Regulations 1998, as detailed in Part 39 - 107 of the Civil Aviation Safety Authority's schedule of airworthiness directives, apply specifically to Sensenich propellers, particularly Model M74DM, installed on Lycoming 0-320-B series engines. This directive mandates inspections at intervals not exceeding 100 hours of time in service. It applies to all Model M74DM propellers installed on Lycoming 0-320-B series engines, excluding those with an "A" or "K" serial number prefix, as well as all Model M74DM propellers regardless of serial number prefix when these are used in agricultural operations on any Lycoming 0-320 series engine. The scope of the regulation is geographically and jurisdictionally comprehensive, applying across the Commonwealth of Australia as overseen by the Civil Aviation Safety Authority. The directive does not specify exclusions, exemptions, or thresholds beyond the noted exceptions for propellers with certain serial number prefixes. The application of this airworthiness directive is further detailed in Sensenich Service Bulletin No. R-8, which provides specific compliance requirements and procedures for the mandated inspections.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, Section 107, include the Airworthiness Directives governing the maintenance and inspection of aircraft components. Within this section, AD/PFP/2 Amendment 1 pertains to Sensenich Propellers and mandates inspections on their hubs. This directive applies to all model M74DM propellers installed on Lycoming 0-320-B series engines, excluding those with an "A" or "K" serial number prefix. Furthermore, it includes all model M74DM propellers regardless of their serial number prefix when these propellers are used in agricultural operations with any Lycoming 0-320 series engine. Compliance with these requirements is to be achieved by adhering to the guidelines outlined in Sensenich Service Bulletin No. R-8. The obligations under this directive require aircraft operators and maintenance personnel to inspect the hubs of the specified Sensenich propellers at intervals not exceeding 100 hours of time in service. This regular inspection ensures that any potential issues or wear on the propeller hubs are identified and addressed promptly, thereby maintaining the safety and airworthiness of the aircraft. It is imperative that these inspections are conducted by certified personnel who are knowledgeable about the specific requirements and procedures outlined in Sensenich Service Bulletin No. R-8. Failure to comply with the Airworthiness Directive AD/PFP/2 Amendment 1 may result in significant legal and safety consequences. Non-compliance could lead to the propeller being deemed unairworthy, which could prevent the aircraft from being operated until the necessary inspections and repairs are performed. Additionally, there may be civil penalties imposed under the Civil Aviation Act 1988, which could include fines. While the specific penalties are not detailed in the Airworthiness Directive itself, they are governed by the broader civil aviation legislation, which provides for substantial financial penalties for non-compliance with airworthiness directives. These penalties serve as a deterrent and underscore the importance of adhering to the mandated inspection intervals and procedures.