AD/CESSNA 208/1 Amdt 1 - Fuel Selector Off Warning System

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, serve to regulate civil aviation safety and operations within the country. Part 39 of these regulations addresses various aspects of airworthiness, including the issuance of specific directives to ensure aircraft safety. One such directive, AD/CESSNA 208/1 Amendment 1, pertains to the Cessna 208 Series Aeroplanes and was introduced to address the issue of fuel starvation during take-off due to improper positioning of fuel tank selectors. This problem was identified through accident investigations in the United States, which prompted the need for a warning system that would alert pilots to the fuel tank selector position and low fuel levels, thereby enhancing safety. The amendment, which incorporates Service Bulletins CAB 86-8 and CAB 86-26, aims to improve the integrity of the low fuel level warning system by ensuring the retention of the transmitter nut through the use of a lock washer and sealant. Compliance with this directive is required unless already achieved, before the issuance of the next Maintenance Release following 28 February 1987.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, pertains to the Cessna 208 Series Aeroplanes, including the Cessna Caravan I models 208/208A with serial numbers ranging from 20800001 to 20800105. This legislation mandates compliance with certain safety directives to address issues identified in prior accident investigations, such as fuel starvation during take-off due to incorrect positioning of fuel tank selectors. The requirement is that any action in accordance with the specified Service Bulletins (Cessna S.B. CAB 86-8 and Cessna S.B. CAB 86-26) must be completed before the issuance of the next Maintenance Release following 28 February 1987. This amendment specifically includes Service Bulletin CAB 86-26 to enhance the reliability of the low fuel level warning system by incorporating a lock washer and sealant to secure the transmitter nut, thereby improving overall safety. The directive applies directly to the specified aircraft models within the given serial number range, ensuring adherence to safety standards set forth by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, which mandates certain safety actions for specific aircraft models. In this instance, AD/CESSNA 208/1 Amendment 1 pertains to all Cessna Caravan I models 208/208A with serial numbers between 20800001 and 20800105 (section 1). The directive requires action to be taken in accordance with Cessna Service Bulletins CAB 86-8 and CAB 86-26, as referenced in Federal Aviation Administration Advisory Directive 86-22-06 (section 2). Compliance with these service bulletins is mandatory, with the requirement that the necessary actions are completed prior to the next Maintenance Release after 28 February 1987 (section 2). This directive was prompted by accident investigations in the USA, which revealed instances of fuel starvation during take-off due to incorrect positioning of the fuel tank selectors (section 1(1)). The directive introduces improvements to the low fuel level warning system to enhance safety by ensuring the pilot is adequately informed of the fuel tank selector position and low fuel levels (section 1(2)). Specifically, Service Bulletin CAB 86-26 includes the addition of a lock washer and sealant to secure the transmitter nut, thus improving the integrity of the warning system (section 1(2)). The obligations imposed by this airworthiness directive are clear and direct. Operators of the affected Cessna Caravan I models must adhere to the outlined service bulletins, which include specific technical modifications and checks. These modifications are intended to prevent potential fuel system failures by ensuring that the fuel selector positions are correctly indicated to the pilot and that low fuel levels are promptly alerted. Operators are required to implement these changes as part of their routine maintenance procedures, ensuring that all actions are completed before the next Maintenance Release following the directive's effective date. Failure to comply with these requirements could result in significant safety risks, as the directive specifically addresses issues that have been linked to accidents involving fuel starvation during critical phases of flight. Failure to comply with the airworthiness directive can lead to serious consequences. The Civil Aviation Regulations 1998, enforced by CASA, impose strict penalties for non-compliance with such directives. In this context, operators who neglect to implement the required modifications and checks risk facing civil penalties, including fines and potential grounding of the affected aircraft until compliance is achieved. The severity of the penalties reflects the critical nature of the safety issues addressed by the directive. While the specific penalties are not detailed in the legislative instrument, general provisions within the Civil Aviation Act 1988 allow for substantial fines and other enforcement actions to ensure compliance with airworthiness standards. Operators must, therefore, prioritise adherence to these directives to maintain the airworthiness of their aircraft and ensure the safety of all passengers and crew.