COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Enstrom F-28 Series Helicopters
AD/ENST 28/18 Alternator Field Cable Protection - Modification 12/77
Applicability: All models.
Requirement: Install a circuit protective device (i.e. in line fuse or circuit breaker) in the field cable 28-3 (or 28-1 when optional overvoltage relay is fitted) as close as practical to the battery master relay connection.
Note: Air Navigation Order 108.32 Appendix 3, Table 6 provides a suitable cable and circuit protector co-ordination chart.
Compliance: 1. Before issue of Certificate of Airworthiness on all aircraft certificated after 28 February 1978.
2. All other aircraft within 100 hours time in service after 28 February 1978.
Overview
The Civil Aviation Regulations 1998, specifically PART 39 - 105, addresses the issue of ensuring the safety of aircraft by mandating compliance with certain airworthiness directives. This legislation was enacted to maintain high safety standards in civil aviation, addressing gaps in previous regulations by providing detailed directives to ensure the airworthiness of aircraft. The policy objective is to enhance the safety of civil aviation by ensuring that all aircraft meet stringent airworthiness standards. This is achieved through the enforcement of specific modifications, such as the installation of a circuit protective device in the field cable of Enstrom F-28 Series Helicopters, as outlined in the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives AD/ENST 28/18. The regulations are enforced by the Civil Aviation Safety Authority and are overseen by the Commonwealth of Australia, ensuring that all aircraft comply with these safety directives to prevent potential hazards.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, governs the airworthiness directives issued by the Civil Aviation Safety Authority (CASA) and applies to all aircraft operating within Australia. One such directive, AD/ENST 28/18, pertains to the Enstrom F-28 Series Helicopters and mandates the installation of a circuit protective device in the field cable 28-3, or 28-1 when an optional overvoltage relay is fitted. This requirement applies to all models of Enstrom F-28 Series Helicopters, necessitating compliance with the directive to maintain airworthiness. The directive applies to aircraft certificated after 28 February 1978 before the issuance of a Certificate of Airworthiness and to all other aircraft within 100 hours of time in service after that date. This regulation ensures that the specified modifications are implemented to prevent potential safety issues related to the alternator field cable. The directive's applicability and compliance details are outlined in the Air Navigation Order 108.32 Appendix 3, Table 6, which provides a suitable cable and circuit protector coordination chart.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39 - 105, specifically address the safety of Enstrom F-28 Series Helicopters with the Airworthiness Directive (AD) 28/18. This directive mandates the installation of a circuit protective device (such as an in-line fuse or circuit breaker) in the field cable 28-3 or 28-1 when an optional overvoltage relay is fitted, to be positioned as close as practical to the battery master relay connection (section 12/77). The directive is applicable to all models of the Enstrom F-28 Series helicopters.
These requirements impose obligations on helicopter operators and maintenance personnel to ensure that the specified modifications are made to the alternator field cables. For helicopters certificated after 28 February 1978, compliance with the directive must be achieved before the issue of a Certificate of Airworthiness. For other aircraft, compliance must be achieved within 100 hours of time in service after the same date. Operators and maintenance personnel must refer to the Air Navigation Order 108.32 Appendix 3, Table 6, which provides a suitable cable and circuit protector coordination chart to assist in the implementation of the directive.
Failure to comply with the requirements of the AD 28/18 may result in serious safety implications, potentially leading to operational issues or failures within the helicopter's electrical system. The regulations do not explicitly state specific offences, penalties, or consequences for non-compliance in the provided text. However, non-compliance with airworthiness directives generally can lead to enforcement actions by the Civil Aviation Safety Authority, including potential grounding of the aircraft until compliance is achieved. Operators and maintenance personnel must ensure adherence to these requirements to maintain the airworthiness of the aircraft and ensure the safety of all operations.