CASA 351/11 – Directions – for determining maximum weight

Overview

The Civil Aviation (Determining Maximum Weight) Direction 2011 was introduced to address the issue of ensuring that specific aircraft operated by Fugro Airborne Surveys Pty Ltd, namely SC-7 Skyvan VH-WGT and CASA 212 VH-TEM, comply with safety regulations despite their inability to adhere to the existing weight limitations set forth in Civil Aviation Orders 20.7.1B and 20.7.4. Enacted under the authority of the Civil Aviation Act 1988, this instrument aims to provide specific directions to ensure the safe operation of these aircraft under certain conditions. The policy objective is to maintain the highest standards of air navigation safety, particularly concerning the weight restrictions that impact flight operations. The instrument is a legislative instrument under the Legislative Instruments Act 2003, subject to parliamentary oversight, and it renews a previous direction issued for the same purpose.

Scope and Application

The Civil Aviation Regulations 1988, as amended by the instrument CASA 351/11, apply specifically to the operations of the SC-7 Skyvan VH-WGT and CASA 212 VH-TEM aircraft when they are operated by Fugro Airborne Surveys Pty Ltd. These regulations are concerned with determining the maximum allowable weight for these aircraft during take-off, flight, and landing, ensuring they comply with the relevant safety standards set by the Civil Aviation Safety Authority (CASA). The regulations are particularly stringent for flights conducted outside daylight hours, or when the flight path involves flying below 1,000 feet above ground level for more than three kilometres over populated or industrial areas. The instrument stipulates that for such adverse circumstances, the aircraft must adhere to the stricter weight limitations outlined in Civil Aviation Order 20.7.1B. Conversely, for operations that do not include these adverse conditions, the aircraft must comply with the less stringent limitations set out in Civil Aviation Order 20.7.4. This nuanced approach ensures that safety is maintained while also allowing for operational flexibility in non-adverse conditions. The instrument is a legislative instrument under the Legislative Instruments Act 2003 and is subject to parliamentary oversight, although consultation was deemed unnecessary due to the specific and technical nature of the instrument.

Key Provisions

The Civil Aviation Regulations 1988, as amended, set forth a framework for the safety of air navigation in Australia, with key provisions outlined in sections such as 98 (authorising the Governor-General to make regulations) and subregulations 235(1), 235(4), and 235(6) (authorising the Civil Aviation Safety Authority (CASA) to issue directions on aircraft gross weight). The authority to issue these directions stems from the need to ensure that aircraft do not exceed their maximum take-off weight (MTOW) or maximum landing weight (MLW), as stipulated in the aircraft's certificate of airworthiness (CofA) or flight manual. Specifically, subregulation 235(1) allows CASA to give directions for estimating the gross weight of an aircraft, while subregulations 235(4) and 235(6) establish that it is an offence for the pilot in command to allow an aircraft to take off or land if its gross weight exceeds its MTOW or MLW. These provisions are critical for maintaining safety standards in air navigation. The obligations imposed by the Civil Aviation Regulations 1988 on the parties governed by the Act, particularly the operator Fugro Airborne Surveys Pty Ltd, include ensuring that the gross weight of their aircraft, the SC-7 Skyvan VH-WGT and CASA 212 VH-TEM, does not exceed the specified MTOW or MLW during any flight, landing, or take-off. This obligation is further detailed in Civil Aviation Orders (CAO) 20.7.1B and 20.7.4, which provide specific guidelines for determining the maximum allowable gross weight based on the aircraft's configuration and operational conditions. The operator must adhere to these guidelines, particularly when the aircraft are configured for aerial survey work, as they exceed the 5,700 kg threshold. Moreover, the operator must ensure that flights do not include adverse circumstances such as night flights or low-level flights over populated areas, unless otherwise approved by CASA. Failure to comply with the weight limitations and operational directives set out in the Civil Aviation Regulations 1988 and the associated CAOs can result in significant consequences. Under subregulations 235(4) and 235(6), it is an offence for the pilot in command to allow an aircraft to take off or land if its gross weight exceeds its MTOW or MLW, which may lead to criminal charges and penalties. Although the specific maximum penalties are not detailed in the explanatory statement, such offences typically attract fines and potential imprisonment under the relevant aviation laws. Additionally, the operator's failure to comply with CASA's directions can result in the revocation of the aircraft's operating certificate, grounding of the aircraft, and other regulatory actions that could impact the operator's ability to conduct aerial surveys.