AD/CESSNA 206/43 Amdt 1 - Battery Vent System

Overview

The Civil Aviation Regulations 1998 (Cth), administered by the Civil Aviation Safety Authority (CASA), are designed to ensure the safe operation of aircraft within Australian airspace. Specifically, Part 39 - 105 of the regulations sets forth the Schedule of Airworthiness Directives, which includes AD/CESSNA 206/43 Amendment 1 issued in 1986. This directive addresses safety concerns related to the battery vent system of Cessna Model U206G and TU206G aeroplanes equipped with SCL Turbine PAC power plants. The primary objective of this amendment is to prevent battery explosions caused by the ignition of battery vent gases, thereby ensuring the ongoing airworthiness and safety of these aircraft. Compliance with the directive requires inspections and modifications to the battery vent system within specified time frames after a designated date, ensuring that the system provides adequate battery venting and adheres to the updated STC reference.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, applies to all Cessna Model U206G and TU206G aeroplanes with a SCL Turbine PAC power plant that have been converted in accordance with STC SA2353 NM. This legislation mandates the inspection and modification of the battery vent system to prevent potential hazards such as battery explosions from vent gas ignition. The applicability of these regulations extends across the Commonwealth of Australia, overseen by the Civil Aviation Safety Authority. Compliance with the regulations requires inspections to be carried out within 5 hours of the aeroplane's time in service following 21 January 1986, and modifications to be completed within 25 hours of the same time in service. These directives ensure the safety of the aircraft and its occupants by maintaining the integrity of the battery vent system, with the possibility for the pilot-in-command to perform the inspection, provided the appropriate certification is documented.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, outlines a schedule of airworthiness directives for various aircraft, including the Cessna 206 Series Aeroplanes. In the context of the Cessna Model U206G and TU206G aeroplanes with a SCL Turbine PAC power plant converted in accordance with STC SA2353 NM, the main requirements are detailed in AD/CESSNA 206/43 Amendment 1. This directive mandates inspections and modifications to the battery vent system to prevent potential battery explosions. Section 1 of the directive requires an inspection of the battery vent system for any kinks or blockages, ensuring that the system provides adequate venting. If any issues are found, the system must be cleared as necessary. Section 2 mandates a modification to the battery vent system according to the specifications outlined in Soloy Conversions Ltd S.B. 06-763. Compliance timelines are specified, with inspections required within 5 hours of time in service after 21 January 1986, and modifications needed within 25 hours of time in service after the same date. The inspection, as per Section 1, can be performed by the pilot-in-command, provided the AD reference is documented in the Maintenance Release. Entities governed by this directive, such as aircraft operators and maintenance providers, must ensure that the battery vent system of the specified Cessna models is inspected and modified as required. This involves identifying and rectifying any obstructions in the vent system and implementing the specified modifications to prevent battery explosions. Compliance with these requirements is critical for maintaining the airworthiness of the aircraft. Failure to comply with the airworthiness directive may result in significant consequences. The primary concern is the potential for a battery explosion, which could compromise the safety of the flight. Additionally, there are potential regulatory consequences for non-compliance. While specific penalties are not outlined in the directive, non-compliance with airworthiness directives generally may lead to enforcement actions by the Civil Aviation Safety Authority. These actions could include fines, suspension or revocation of airworthiness certificates, and other civil or administrative penalties. It is imperative for operators and maintainers to adhere strictly to the requirements set forth to avoid these adverse outcomes.