AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Fokker F100 (F28 Mk 100) Series Aeroplanes
AD/F100/61 Aileron Tab Drive Rod Assembly 4/2004
Applicability: Fokker Aircraft B.V. F.28 Mk.0070 and Mk.0100 aircraft, all serial numbers.
Requirement: 1. Perform a one-time inspection of the Aileron Tab Drive Rod Assembly on each actuator in accordance with Part 2 Accomplishment Instructions of Fokker Service Bulletin (S/B) F100-27-083 dated 20 October 2003.
2. If the clearance between the hydraulic line and the Aileron Tab Drive Rod is 4 mm or more, no further action is required.
3. When chafing damage is found on the Aileron Tab Rod Part Number (P/N) D78896-001, rework and/or replace any affected parts in accordance with steps B.(1)(a) and B.(1)(b) of Part 2 Accomplishment Instruction of the reference document.
4. If the clearance between the hydraulic line and the Aileron Tab Drive Rod is less than 4 mm, take corrective action in accordance with B.(2)(b)3 though B.(2)(b)9 of the reference document.
Note: Civil Aviation Authority Netherlands BLA nr AD 2003-141 refers.
Compliance: For Requirement 1: Unless previously accomplished, within 2 years or 4,000 flight hours after the effective date of this Directive.
For Requirements 3 and 4: Before further flight following completion of Requirement 1 of this Directive.
This Airworthiness Directive becomes effective on 15 April 2004.
Fokker F100 (F28 Mk 100) Series Aeroplanes
AD/F100/61 (continued)
Background: Rotation of the Aileron actuator can occur if the polyamide washer, which is fitted between the actuator and the airframe, is severely worn. The rotation of the actuator can lead to chafing of the aileron tab drive rods and subsequent failure of the aileron tab in manual mode. This Directive requires a one-off inspection and rectification as required to prevent the unsafe condition occurring. An update of the aeroplane maintenance manual will introduce revised inspection intervals to prevent recurrences of such failures.
James Coyne
Delegate of the Civil Aviation Safety Authority 4 March 2004
The above AD is notified in the Commonwealth of Australia Gazette on 24 March 2004.
Overview
The Airworthiness Directive (AD) F2006B09662 was issued in 2004 to address an unsafe condition identified in Fokker F100 (F28 Mk 100) Series Aeroplanes. This legislative instrument was enacted under subregulation 39.1 (1) of the Civil Aviation Safety Regulations 1998 by the Civil Aviation Safety Authority (CASA) delegate. The directive was introduced to correct a specific issue where the rotation of the aileron actuator could occur due to wear on a polyamide washer, leading to potential chafing of the aileron tab drive rods and failure of the aileron tab in manual mode. The policy objective is to ensure that Fokker F100 aircraft maintain airworthiness by requiring a one-off inspection and necessary rectifications to prevent this unsafe condition. The directive became effective on 15 April 2004, mandating inspections and corrective actions within specified timeframes to maintain safety standards.
Scope and Application
The Airworthiness Directive (AD) F2006B09662 pertains specifically to Fokker F100 (F28 Mk 100) Series Aeroplanes, including all serial numbers of Fokker Aircraft B.V. F.28 Mk.0070 and Mk.0100 aircraft. This AD is issued under the authority of the Civil Aviation Safety Authority (CASA) and mandates a one-time inspection of the Aileron Tab Drive Rod Assembly on each actuator, as detailed in Part 2 Accomplishment Instructions of Fokker Service Bulletin (S/B) F100-27-083 dated 20 October 2003. The inspection must be carried out within two years or 4,000 flight hours after the effective date of the AD, which is 15 April 2004. If the clearance between the hydraulic line and the Aileron Tab Drive Rod is found to be 4 mm or more, no further action is required; however, if chafing damage is detected on specific parts, these must be reworked or replaced accordingly. Additionally, corrective actions must be taken if the clearance is less than 4 mm. This AD applies nationwide within the Commonwealth of Australia and is effective from the date of its notification in the Commonwealth of Australia Gazette on 24 March 2004.
Key Provisions
This Airworthiness Directive (AD) applies to all Fokker F100 (F28 Mk 100) series aeroplanes, irrespective of serial number (Section 1). The directive mandates a one-off inspection of the Aileron Tab Drive Rod Assembly on each actuator, as specified in Part 2 of the Fokker Service Bulletin (S/B) F100-27-083 dated 20 October 2003 (Section 2). Depending on the findings during this inspection, further actions may be required. If the clearance between the hydraulic line and the Aileron Tab Drive Rod is 4 mm or more, no further action is necessary. However, if the clearance is less than 4 mm, corrective action must be taken in accordance with specified steps in the reference document. Additionally, if chafing damage is detected on the Aileron Tab Rod Part Number D78896-001, the affected parts must be reworked or replaced.
The AD imposes several obligations on the operators and maintainers of the affected aircraft. Firstly, they must conduct the specified inspection within two years or 4,000 flight hours from the effective date of the directive, unless it has already been performed (Section 3). If any issues are identified during the inspection, such as insufficient clearance between the hydraulic line and the Aileron Tab Drive Rod, or chafing damage on the Aileron Tab Rod, the necessary corrective actions must be taken before the aircraft can be flown again (Section 3). These corrective actions are detailed in the referenced service bulletin and include specific steps for rework or replacement of damaged parts.
Failure to comply with the requirements of this Airworthiness Directive can lead to significant consequences. Although the specific penalties are not detailed in the directive itself, non-compliance with ADs generally can result in serious civil and criminal penalties under Australian law. The Civil Aviation Safety Authority (CASA) has the authority to enforce compliance, and violations can lead to fines, suspension or revocation of airworthiness certificates, and potential criminal charges for those responsible. The severity of these penalties underscores the importance of adhering to the AD to ensure the continued airworthiness and safety of the affected aircraft.
In summary, this AD requires a thorough inspection and, if necessary, corrective actions on the Aileron Tab Drive Rod Assembly of Fokker F100 series aeroplanes to prevent unsafe conditions that could lead to aileron tab failure. Operators and maintainers must comply with these requirements within specified timeframes and take appropriate action based on the inspection findings. Non-compliance with ADs can result in severe civil and criminal penalties, highlighting the critical nature of adhering to these safety directives.