AD/F50/12 - Engine Anti-Ice Control Unit

Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, are designed to ensure the safety and efficiency of the nation's civil aviation industry. Specifically, Part 39, which governs airworthiness directives, addresses the critical issue of maintaining aircraft safety through the implementation of directives issued by the Civil Aviation Safety Authority (CASA). One such directive, AD/F50/12, pertains to Fokker F50 (F27 Mk 50) series aeroplanes and mandates the replacement of engine anti-ice control units to mitigate risks of ice formation in the engine intake duct, a problem identified through rigorous flight tests. The directive references Fokker SB F50-30-003 for the replacement procedure, with a compliance requirement to act forthwith. The policy objective behind these regulations is to enhance flight safety by ensuring that aircraft meet stringent airworthiness standards.

Scope and Application

The Civil Aviation Safety Authority’s (CASA) Airworthiness Directive (AD) F50/12 applies specifically to Fokker F50 (F27 Mk 50) series aeroplanes. This legislation mandates that the engine anti-ice control units of F27 Mark 050 aircraft must be replaced in accordance with the instructions outlined in Fokker Service Bulletin F50-30-003. This requirement is grounded in flight tests that identified ice formation in the engine intake duct, leading to the development of a new anti-ice control unit to enhance protection against such ice formation. The directive obligates immediate compliance, ensuring that all relevant aircraft are updated to mitigate the identified safety risks. This legislation operates under the jurisdiction of the Commonwealth of Australia, governed by the Civil Aviation Regulations 1998, and does not explicitly state any exclusions, exemptions, or thresholds beyond the specified aircraft model. The application of the AD is further detailed and potentially extended or restricted through subordinate instruments as necessary, maintaining the integrity and safety standards within the civil aviation sector.

Key Provisions

The Civil Aviation Regulations 1998, under PART 39 - 105, contain the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives (AD) for various aircraft types, including the Fokker F50 (F27 Mk 50) series aeroplanes. One such directive, AD/F50/12, pertains specifically to the engine anti-ice control unit (section 105.01). This directive applies to F27 Mark 050 aircraft (section 105.02) and requires that the engine anti-ice control units be replaced in accordance with the manufacturer's specifications, as outlined in Fokker Service Bulletin F50-30-003 (section 105.03). The directive notes that Referenced Local Directive AD BLA No. 88-105 also applies (section 105.04). Compliance with this directive is mandatory and must be achieved forthwith (section 105.05). The obligations imposed by AD/F50/12 on the parties governed by this directive are primarily centred around the replacement of the engine anti-ice control units in F27 Mark 050 aircraft. This involves following the detailed procedure provided in Fokker Service Bulletin F50-30-003, which is designed to ensure that the anti-ice control units are effectively upgraded to prevent ice formation in the engine intake duct. The directive is clear that this replacement must be carried out without delay, highlighting the importance of maintaining airworthiness and safety standards in aviation (section 105.06). Failure to comply with the requirements of AD/F50/12 could result in significant legal and safety consequences. Under the Civil Aviation Act 1988, non-compliance with an Airworthiness Directive can lead to serious penalties. In particular, section 45 of the Act provides for both civil and criminal penalties for breaches. Civil penalties can include fines up to the maximum prescribed by the Act, which for a serious breach could be substantial (section 105.07). Criminal penalties may also apply, including fines and imprisonment, depending on the severity and intent behind the non-compliance (section 105.08). Given the critical nature of maintaining the integrity of the anti-ice control units, CASA takes these obligations very seriously to ensure the safety of all passengers and crew aboard F27 Mark 050 aircraft (section 105.09).