COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 337 Series Aeroplanes
AD/CESSNA 337/9 Rear Engine Idle RPM - Adjustment
and Placard Installation
8/71
Applicability: All models.
Requirement: 1. Readjust the rear engine idle setting from 600 + 25 RPM to 650 + 25 RPM and readjust the idle mixture accordingly.
2. Install a permanent placard adjacent to the tachometer as follows:
TAKE AND TAKE-OFF LEAD WITH REAR ENGINE POWER CHECK RPM AND FUEL FLOW.
Note: The operator may make and install a temporary placard, using letters of 1/8" minimum height, until a permanent placard as detailed in Cessna SL No. ME71-21 is obtained from the manufacturer and installed.
Compliance: Within 10 hours time in service after 25 August 1971.
Overview
The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, serve to regulate civil aviation and ensure safety standards are met across the industry. One particular aspect addressed by these regulations is the issuance of Airworthiness Directives (ADs) to maintain and enhance aircraft safety. The AD/CESSNA 337/9, focusing on the Cessna 337 series aeroplanes, was introduced to address issues related to rear engine idle RPM settings and placard installations. This directive was issued to correct operational discrepancies and ensure the safe operation of the aircraft by adjusting the rear engine idle setting and mandating the installation of a placard for pilot reference during critical flight phases. The policy objective behind such regulations is to mitigate safety risks by providing clear operational guidelines and ensuring compliance through specific, time-bound actions.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates adherence to airworthiness directives, such as AD/CESSNA 337/9, which applies to all Cessna 337 series aeroplanes. This regulation requires operators to readjust the rear engine idle setting to 650 + 25 RPM and recalibrate the idle mixture, ensuring safer operational parameters. Additionally, a permanent placard must be installed adjacent to the tachometer, providing specific instructions regarding the lead with rear engine power check RPM and fuel flow. Operators are allowed to use a temporary placard of a minimum height of 1/8" until the permanent placard, as per Cessna Service Letter ME71-21, is procured and installed. Compliance with these directives is mandatory within ten hours of the aircraft being in service after 25 August 1971. The regulation extends its jurisdictional reach across the Commonwealth of Australia, overseen by the Civil Aviation Safety Authority, ensuring all aircraft operating within Australian airspace meet these specified airworthiness standards.
Key Provisions
The Civil Aviation Regulations 1998, specifically within Part 39 - 105 under the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, contain provisions that mandate adjustments to the rear engine idle RPM for Cessna 337 Series Aeroplanes. According to AD/CESSNA 337/9 (section 8/71), the main operative sections require operators to readjust the rear engine idle setting from 600 + 25 RPM to 650 + 25 RPM and to readjust the idle mixture accordingly. Additionally, a permanent placard must be installed adjacent to the tachometer, detailing the necessary lead with rear engine power check RPM and fuel flow. Operators are permitted to use a temporary placard until the permanent placard, as detailed in Cessna Service Letter ME71-21, can be obtained from the manufacturer and installed.
The obligations imposed on the parties governed by this Act include adhering to the specified timeframes for compliance. Operators must complete the required adjustments and placard installation within 10 hours of the aircraft being in service after 25 August 1971. This ensures that the necessary modifications are promptly implemented, maintaining the safety and airworthiness standards expected by the Civil Aviation Safety Authority. The requirement to install a placard ensures that pilots are adequately informed of the changes and can reference these details during flight operations.
Failure to comply with the provisions of AD/CESSNA 337/9 may result in serious consequences. The Civil Aviation Regulations 1998 stipulate that non-compliance can lead to civil or criminal penalties. The specific penalties for breaches are not detailed within the text of this particular directive, but generally, non-compliance with airworthiness directives can result in substantial fines, suspension or revocation of aircraft certificates, and potential criminal charges if the breach leads to safety incidents. The maximum penalties would depend on the severity of the breach and the resultant impact on aviation safety.