{"id":"F2006B09662","name":"AD/F100/61 - Aileron Tab Drive Rod Assembly","slug":"ad-f100-61-aileron-tab-drive-rod-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115788,"registerId":"commonwealth-F2006B09662-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor 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.\n\n![](image.001.png)  \n\nFokker F100 (F28 Mk 100) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/F100/61 Aileron Tab Drive Rod Assembl","sectionType":"part","heading":"AD/F100/61 Aileron Tab Drive Rod Assembly 4/2004","content":"# AD/F100/61 Aileron Tab Drive Rod Assembly 4/2004\n\nApplicability: Fokker Aircraft B.V. F.28 Mk.0070 and Mk.0100 aircraft, all serial numbers.\n\nRequirement: 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.\n\n    2. If the clearance between the hydraulic line and the Aileron Tab Drive Rod is 4 mm or more, no further action is required.\n\n    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.\n\n    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.\n\nNote: Civil Aviation Authority Netherlands BLA nr AD 2003-141 refers.\n\nCompliance: For Requirement 1: Unless previously accomplished, within 2 years or 4,000 flight hours after the effective date of this Directive.\n\nFor Requirements 3 and 4: Before further flight following completion of Requirement 1 of this Directive.\n\nThis Airworthiness Directive becomes effective on 15 April 2004.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive text indicates a corrective, safety‑focused measure limited to the stated Fokker models and all serial numbers, prescribing a one‑time inspection and remedial actions per the referenced service bulletin and Netherlands AD. There is no textual indication it expands or narrows the original applicability or the nature of obligations beyond those corrective inspection and repair requirements."},"complexity_factors":["Limited applicability: only Fokker F.28 Mk.0070 and Mk.0100, all serial numbers — narrows affected population.","Single, one‑time inspection with a clear numeric threshold (4 mm) — low technical ambiguity for pass/fail.","Dependency on an external document (Fokker Service Bulletin F100‑27‑083, Part 2) for detailed procedures and corrective steps — operator must obtain and follow that SB.","Specific part identification (P/N D78896‑001) and referenced steps (B.(1)(a),(b); B.(2)(b)3–B.(2)(b)9) create operational/parts‑sourcing tasks.","Fixed compliance window (2 years or 4,000 flight hours) imposes scheduling and record‑keeping duties on operators.","Requirement that corrective action be completed before further flight creates a potential immediate grounding/completion pressure if defects are found.","Cross‑reference to Civil Aviation Authority Netherlands AD increases regulatory alignment/coordination considerations.","Inspection may require precise measurement and judgement about chafing and clearance in confined actuator areas — technical access and labour considerations."],"plain_english_summary":"This Airworthiness Directive requires operators of Fokker F.28 Mk.0070 and Mk.0100 aircraft to perform a one‑time inspection of each aileron tab drive rod assembly and measure the clearance to the adjacent hydraulic line. If chafing is found or the clearance is under 4 mm, the affected rod or parts must be reworked or replaced following the referenced Fokker service bulletin.\n\nThe inspection must occur within 2 years or 4,000 flight hours; any required corrective work must be completed before the aircraft returns to service. It affects aircraft owners/operators, maintenance organisations and parts suppliers."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific unsafe condition on specific aircraft types. The scope remains tightly focused on the aileron tab drive rod assembly issue as originally identified."},"complexity_factors":["Short, single-purpose directive focused on one mechanical component","Only 4 numbered requirements with clear conditional logic (if/then structure)","References external technical document (Fokker Service Bulletin) for detailed instructions rather than reproducing them","Simple applicability (all serial numbers of two specific aircraft models)","Straightforward compliance timeline (2 years/4,000 hours for inspection, immediate for repairs)","No nested definitions or extensive interpretation sections","Single cross-reference to Dutch aviation authority document (CAA-NL AD 2003-141)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection of the aileron tab drive rod assembly on all Fokker F70 and F100 aircraft to check hydraulic‑line clearance. If clearance is under 4 mm or rubbing/chafing is found, required corrective actions or repairs must be completed before further flight; 4 mm or more requires no further action. The inspection deadline is within 2 years or 4,000 flight hours, whichever occurs first."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-61-aileron-tab-drive-rod-assembly","history":"/api/acts/ad-f100-61-aileron-tab-drive-rod-assembly/history","analysis":"/api/acts/ad-f100-61-aileron-tab-drive-rod-assembly/analysis","conflicts":"/api/acts/ad-f100-61-aileron-tab-drive-rod-assembly/conflicts","importantCases":"/api/acts/ad-f100-61-aileron-tab-drive-rod-assembly/important-cases","documents":"/api/acts/ad-f100-61-aileron-tab-drive-rod-assembly/documents"}}