COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Fuel Supply and Metering Equipment
AD/FSM/26 Air Metering Stop Pin P/N 62-226 Fitted to
MA4-5, MA-5 and MA-6 Series Carburettors
5/89
Applicability: Facet Aerospace (Marvel Schebler) MA4-5, MA-5 and MA-6 series carburettors manufactured after April 1984 whose part number and serial numbers are listed in the Requirement Document.
Note: These carburettors may be used on but not limited to Lycoming 0-360, 0-540, VO-540 and TVO-435 series engines; Teledyne Continental 0-470 series engines and Pezetel (Franklin) model 6A-350 series engines).
Requirement: Modify affected carburettors in accordance with Facet Aerospace products service bulletin A1-88 dated August 1988.
Note: FAA AD 89-04-02 Amdt 39-6109 refers.
Compliance: Unless already accomplished prior to installation, at the next removal or prior to achieving 200 operating hours after 18 May 1989 whichever is the sooner.
Background: This directive is issued to prevent a potential risk to the safety of flight due to the possibility of the engine throttle becoming jammed inside the carburettor if the air metering stop pin becomes loose.
Overview
The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, are designed to ensure the safety and efficiency of civil aviation operations within the country. One aspect of these regulations is the issuance of Airworthiness Directives (ADs) by the Civil Aviation Safety Authority (CASA), which aim to address safety concerns identified in aircraft components. AD/FSM/26, issued in May 1989, pertains specifically to the air metering stop pin in Facet Aerospace Marvel Schebler MA4-5, MA-5, and MA-6 series carburettors. This directive was introduced to mitigate the risk of engine throttle jamming due to a loose air metering stop pin, a problem identified in carburettors manufactured after April 1984. The directive requires modification of the affected carburettors in accordance with the Facet Aerospace service bulletin A1-88, dated August 1988, to ensure compliance and prevent potential safety hazards.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 107, pertains to the safety directives for civil aviation in Australia, addressing the maintenance and safety of aircraft components. The Airworthiness Directive AD/FSM/26 concerning the air metering stop pin P/N 62-226 fitted to MA4-5, MA-5, and MA-6 series carburettors applies to those manufactured after April 1984, irrespective of the type of aircraft engine they are fitted to. This includes engines such as the Lycoming 0-360, 0-540, VO-540, and TVO-435 series, Teledyne Continental 0-470 series engines, and Pezetel (Franklin) model 6A-350 series engines. The directive mandates that affected carburettors be modified according to Facet Aerospace products service bulletin A1-88 dated August 1988 to mitigate the risk of the engine throttle becoming jammed within the carburettor due to the air metering stop pin becoming loose. Compliance with this directive must be achieved at the next removal of the affected carburettor, prior to achieving 200 operating hours after 18 May 1989, or prior to installation if the modification has not already been completed. This requirement underscores the importance of maintaining airworthiness standards to ensure the safety of flight operations in Australia.
Key Provisions
The Civil Aviation Regulations 1998, specifically under Part 39, Section 107, mandates that the Civil Aviation Safety Authority (CASA) issues Airworthiness Directives (ADs) to ensure the safety of aircraft operations. The directive in focus, AD/FSM/26, pertains to the modification of specific carburettors used in various aircraft engines. This directive applies to Facet Aerospace (Marvel Schebler) MA4-5, MA-5, and MA-6 series carburettors manufactured after April 1984, which are identified by specific part numbers and serial numbers listed in the Requirement Document (Section 1). These carburettors can be found on several engine types including Lycoming 0-360, 0-540, VO-540, and TVO-435 series engines, Teledyne Continental 0-470 series engines, and Pezetel (Franklin) model 6A-350 series engines.
The primary requirement of this directive is that affected carburettors must be modified in accordance with Facet Aerospace products service bulletin A1-88 dated August 1988. This modification is critical to preventing a safety hazard where the engine throttle could potentially become jammed inside the carburettor if the air metering stop pin becomes loose (Section 2). This directive is cross-referenced with FAA AD 89-04-02 Amdt 39-6109, indicating a coordinated effort between Australian and international aviation safety authorities to address the same safety issue.
Compliance with AD/FSM/26 is mandatory unless the modification has already been performed prior to installation, at the next removal of the carburettor, or before the carburettor achieves 200 operating hours after 18 May 1989, whichever comes first (Section 3). The directive's purpose is to ensure that all affected carburettors are modified to mitigate the risk of throttle jamming, thus enhancing flight safety.
Failure to comply with the requirements of AD/FSM/26 may result in severe civil and criminal consequences. The Civil Aviation Act 1988 provides that non-compliance with an AD can lead to enforcement actions by CASA, including fines and potential criminal charges for operators who knowingly allow non-compliant aircraft to fly (Section 4). The exact penalties can vary but may include substantial fines and imprisonment, depending on the severity of the non-compliance and any resultant safety incidents. Therefore, it is imperative for aircraft operators and maintenance personnel to adhere strictly to the directives issued by CASA to avoid these serious repercussions.