AD/TBM 700/11 - Flap Carriages

Overview

The Civil Aviation Regulations 1998 (Cth), specifically within Part 39, addresses the maintenance and safety of aircraft, including issuing Airworthiness Directives (ADs) to ensure the safe operation of aircraft within Australian airspace. This legislative instrument was enacted by the Commonwealth of Australia to establish and maintain standards for civil aviation, including addressing specific safety issues identified in particular aircraft models. The problem or gap this legislation was introduced to address includes ensuring the structural integrity and safety of the flap carriages on Aerospatiale (Socata) TBM 700 Series Aeroplanes, which is crucial for the safe operation of these aircraft. The policy objective is to mandate regular inspections and, if necessary, the replacement of certain components to prevent potential safety hazards related to the flap carriages. The specific Airworthiness Directive AD/TBM 700/11 pertains to the flap carriages of the TBM 700 aircraft, requiring inspections and, in some cases, the replacement of attaching bolts and screws. This directive aims to ensure that the flap rail integrity is maintained, thus preventing potential structural failures that could compromise flight safety. Compliance with these directives is mandatory and enforced by the Civil Aviation Safety Authority, ensuring that the aircraft meet the required safety standards before they can be operated.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives for Aerospatiale (Socata) TBM 700 Series Aeroplanes, applies to aircraft with serial numbers 1 to 92, 97, and 98. This directive mandates the visual inspection of the web of the inboard and outboard flap carriages on the left and right-hand flaps and, for specific serial numbers, the replacement of attaching bolts and screws. The directive aims to ensure the structural integrity of the flap rails, ensuring safety in flight operations. Compliance with these regulations requires inspections at specific intervals and before certain service hour thresholds, with more stringent checks if the flap carriage is found to be cracked. These requirements are intended to be met in accordance with the Socata Service Bulletin 70-048-57, Amendment 1, and the TBM 700 Maintenance Manual. The application of this directive is geographically bound to the Commonwealth of Australia and affects all operations within its jurisdiction, ensuring adherence to national aviation safety standards.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, include Airworthiness Directives (ADs) that are critical for ensuring the safety and compliance of aircraft within Australia's aviation sector. One such AD, AD/TBM 700/11, pertains to the Aerospatiale (Socata) TBM 700 Series Aeroplanes, focusing on the flap carriages. This directive applies to TBM 700 aircraft with serial numbers ranging from 1 to 92, 97, and 98. The main requirements outlined in this directive include a thorough visual inspection of the web of the inboard and outboard flap carriages on both the left and right-hand flaps, as detailed in Socata Service Bulletin (SB) 70-048-57, Amendment 1. For certain serial numbers (1 to 19, 21, 22, 24 to 32, 34 to 68, 70 to 91), the directive mandates the replacement of the attaching bolts and screws, also as per SB 70-048-57, Amendment 1. The obligations imposed by AD/TBM 700/11 are clear and specific. Aircraft operators and maintenance personnel must conduct the prescribed inspections and replacements according to the timelines and procedures outlined in the directive. For aircraft with more than 300 hours of time in service, inspections must occur before 10 hours after 25 May 1995. Those with less than 300 hours of service must be inspected at the next scheduled maintenance check following 25 May 1995 or before reaching 310 hours of service, whichever comes first. Subsequent inspections should not exceed intervals of 50 hours if the flap carriage is cracked and stop-drilled within prescribed limits, or 100 hours if not cracked. Additionally, for specific serial numbers, the replacement of attaching bolts and screws must be carried out at the next inspection following 25 May 1995 or before installing new flap carriage fittings. The replacement of flap carriages with new design carriages cancels the inspection requirements of this directive. Failure to comply with AD/TBM 700/11 can result in severe consequences. The Civil Aviation Safety Authority (CASA) enforces these directives rigorously, and non-compliance can lead to enforcement actions, penalties, or even grounding of the aircraft. The specific penalties are not detailed in the provided text but typically involve fines and potential legal action against the operators or maintenance providers who fail to adhere to the mandated safety standards. Adhering to these regulations is crucial for maintaining airworthiness and ensuring the safety of all passengers and crew.