COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Fokker F100 (F28 Mk 100) Series Aeroplanes
AD/F100/31 Flight Augmentation Computer Replacement 4/99
Applicability: Model F.28 Mk.0100 aeroplanes serial numbers 11244 through 11348 inclusive.
Requirement: 1. Unless previously accomplished replace all Collins Flight Augmentation Computer (FAC) units, part number (P/N) 622-7478-321, with modified units P/N 622-7478- 401 Mod.11 in accordance with Fokker Service Bulletin (SB) F100-22-026 dated 1 July 1991.
2. Replace all Collins FAC units, P/N 622-7478-401, with modified units P/N 622-7478-401 Mod.11 in accordance with Fokker SB F100-22-032 dated
2 September 1991.
Note: Netherlands AD 1991-057/4 refers.
Compliance: 1. Prior to 22 December 1999.
2. Prior to 22 December 1999.
This Airworthiness Directive becomes effective on 22 April 1999.
Background: The modified computers provide improved fault isolation to allow cross comparison of more signals than previously possible. Problems with stabiliser trim systems during ground testing and nuisance yaw-damper faults during take off have been solved by the incorporation of an additional modification.
Overview
The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, address the need for consistent and effective safety standards in civil aviation, aiming to protect public safety and property. Part 39 - 105, specifically the Civil Aviation Safety Authority Schedule of Airworthiness Directives, provides detailed safety requirements and operational standards for various aircraft types. One such directive, AD/F100/31, mandates the replacement of Collins Flight Augmentation Computer (FAC) units in Fokker F100 (F28 Mk 100) series aeroplanes, serial numbers 11244 through 11348. This directive was introduced to address specific faults identified in the flight augmentation systems, such as stabiliser trim system issues during ground testing and yaw-damper faults during takeoff. The objective is to ensure the aircraft meet the necessary safety standards by incorporating improved fault isolation capabilities, thereby enhancing flight safety and reliability. Compliance with this directive is mandatory and must be completed before 22 December 1999.
Scope and Application
The Civil Aviation Regulations 1998, specifically PART 39 - 105 issued by the Civil Aviation Safety Authority, applies to Fokker F100 (F28 Mk 100) series aeroplanes with serial numbers ranging from 11244 to 11348 inclusive. This regulation mandates the replacement of specific Collins Flight Augmentation Computer (FAC) units in these aircraft to enhance flight safety. The requirement entails replacing all FAC units, initially part number 622-7478-321, with modified units P/N 622-7478-401 Mod.11, as outlined in Fokker Service Bulletins F100-22-026 and F100-22-032. This replacement must be completed before 22 December 1999, ensuring compliance with the directive effective from 22 April 1999. This directive does not specify exclusions or exemptions, and it is applicable to the designated Fokker F100 series aircraft within the Commonwealth of Australia, extending its reach to ensure the safety of these specific models in operation.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, detail the Civil Aviation Safety Authority’s (CASA) Schedule of Airworthiness Directives. This directive (AD/F100/31) pertains to Fokker F100 (F28 Mk 100) Series Aeroplanes, with serial numbers ranging from 11244 to 11348 inclusive. It mandates the replacement of the Collins Flight Augmentation Computer (FAC) units to enhance the aeroplanes' safety. The directive requires two primary actions: first, replacing all Collins FAC units part number (P/N) 622-7478-321 with modified units P/N 622-7478-401 Mod.11, in accordance with Fokker Service Bulletin (SB) F100-22-026 dated 1 July 1991; and second, replacing all Collins FAC units P/N 622-7478-401 with modified units P/N 622-7478-401 Mod.11, as per Fokker SB F100-22-032 dated 2 September 1991. Compliance with these directives must be achieved prior to 22 December 1999.
Operators of the affected Fokker F100 series aeroplanes are obligated to ensure that the specified Collins FAC units are replaced with the modified versions as outlined in the directive. This involves meticulous adherence to the guidelines provided in the referenced Fokker Service Bulletins. The primary aim is to improve the aeroplanes' safety by enhancing fault isolation and cross-comparison capabilities of the FAC units, thereby resolving issues such as stabiliser trim system problems during ground testing and nuisance yaw-damper faults during take off.
The directive establishes clear timelines for compliance, necessitating that the replacement of the specified Collins FAC units be completed before 22 December 1999. Failure to comply with these deadlines could result in the aeroplanes being deemed non-airworthy, potentially leading to grounding and severe operational disruptions. Operators must coordinate with Fokker and CASA to ensure the modifications are carried out correctly and in a timely manner, in line with the specified technical standards.
Failure to comply with the Airworthiness Directive can result in severe consequences, both civil and criminal. Non-compliance may lead to enforcement actions by CASA, which could include the suspension or revocation of the aeroplanes' airworthiness certificates. Such actions can result in the aeroplanes being grounded until the required modifications are completed. Additionally, operators who fail to adhere to the directive may face civil penalties, including fines, and potential criminal charges for endangering public safety. The exact penalties are not specified in the directive, but they could include substantial fines and imprisonment, depending on the severity and impact of the non-compliance.