AD/CESSNA 550/14 - Indirect (Fluorescent) Lighting System

Overview

The Civil Aviation Regulations 1998, which were enacted by the Parliament of the Commonwealth of Australia, contain a comprehensive framework to ensure the safety of civil aviation. This legislation includes Part 39, which addresses specific airworthiness directives, including the AD/CESSNA 550/14 directive concerning the Cessna 550 (Citation II) Series Aeroplanes. The directive was introduced to address the issue of the indirect (fluorescent) lighting system in certain Cessna 550 aircraft models being wired with low voltage wiring instead of the required high voltage wiring, thereby posing a safety risk. The policy objective of the directive is to ensure that these aircraft are compliant with the necessary safety standards to prevent potential electrical faults or fires, thereby enhancing overall aviation safety. This airworthiness directive mandates that specific models of the Cessna 550 series, identified by their serial numbers, must have the indirect (fluorescent) lighting system circuit breaker CB275 pulled and disabled. Compliance with this directive is required before the next flight following receipt of the directive. Cessna Alert Service Letters and Federal Aviation Administration Advisories reference related issues, and compliance with Service Bulletins SB 550-33-9 and SB S550-33-5, as applicable, will constitute the necessary action to address this safety concern.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, under the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, applies to the Cessna 550 (Citation II) series aeroplanes identified by specific serial numbers. This directive mandates that the indirect (fluorescent) lighting system circuit breaker CB275 be pulled and disabled. The requirement applies to models 550 with serial numbers 0561, 0562, 0564 through 0566, 0568, and 0569, as well as models S550 with serial numbers 0140 through 0146 and 0148, 0149. Compliance with this directive must be achieved before the next flight following the receipt of the directive. The directive references relevant Cessna Alert Service Letters and FAA Airworthiness Directives, and compliance with Service Bulletins SB 550-33-9 or SB S550-33-5 will satisfy the requirement for this directive. The directive does not specify a particular geographic or jurisdictional reach beyond the applicability to the identified aircraft models.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105 and the Civil Aviation Safety Authority Schedule of Airworthiness Directives, include an important directive concerning the Cessna 550 (Citation II) series aeroplanes, identified as AD/CESSNA 550/14. This directive pertains to the indirect (fluorescent) lighting system and requires operators to pull and disable the circuit breaker CB275 for specific serial numbers of the aircraft models 550, which include S/No 0561, 0562, 0564 through 0566, 0568, and 0569, as well as S/No 0140 through 0146, and 0148, 0149 (Section 1). The directive references relevant Cessna Alert Service Letters and FAA AD 88-06-02, and notes that compliance with Service Bulletins SB 550-33-9 or SB S550-33-5, as applicable, will suffice as terminating action for this directive (Section 2). The primary obligation imposed by this directive is for operators to ensure that the specified action is taken before the next flight following receipt of this Airworthiness Directive. This involves physically pulling and disabling the circuit breaker CB275 to address the identified safety issue related to the wiring of the indirect (fluorescent) lighting system. The directive requires prompt attention to these wiring discrepancies, as they pose a potential safety risk to the aircraft and its occupants. Failure to comply with the requirements outlined in this Airworthiness Directive may result in significant consequences. Non-compliance could lead to operational disruptions, increased risk of safety incidents, and potential enforcement actions under the Civil Aviation Regulations 1998. While the specific penalties for non-compliance are not detailed in this directive, it is understood that breaches of airworthiness directives can result in severe penalties under Australian civil aviation law, including fines and potential grounding of the aircraft until compliance is achieved. The seriousness of these potential outcomes underscores the importance of adhering to the directive's requirements without delay.