{"id":"F2006B09898","name":"AD/F50/69 Amdt 2 - In Wing Aileron Control Cables","slug":"ad-f50-69-amdt-2-in-wing-aileron-control-cables","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55065,"registerId":"commonwealth-F2006B09898-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F50/69 Amdt 2 - In Wing Aileron Control Cables","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nFokker F50 (F27 Mk 50) Series Aeroplanes\n\nAD/F50/69\n\nAmdt 2\n\n  \nIn Wing Aileron Control Cables 9/96\n\nApplicability: F.27 Mk.050 S/n 20103 to 20172 not in compliance with Fokker SB F50-27-016 Part 2.\n\nRequirement: 1. Unless already accomplished in accordance with the previous issues of this Directive:\n\n    for aircraft pre- SB F50-27-016 Part 1, increase the aileron cable tension in accordance with Part 1 of the Accomplishment Instructions of Fokker SB F50- 27-016 Rev.2; or\n\n    b. for aircraft post- SB F50-27-016 Part 1, verify the aileron cable tension in the LH and RH wings is in accordance with Part 1 of the Accomplishment Instructions of Fokker SB F50-27-016 Rev.2.\n\n2. Replace all aileron control cables in the wing, P/Nos F8502-907-405, \\-407, \\-409,\n\n\\-411, \\-429, \\-431, \\-433 and \\-435; in accordance with Fokker S.B. F50-27-040.\n\nReplacement of the aileron cables, and modification of the pulley bracket in accordance with Fokker S.B. F50-27-016 Part 2 is an acceptable means of compliance with this paragraph.\n\nNote: RLD AD BLA nr.1995-075/3(A) refers.\n\nCompliance: For Requirement 1: Within 30 days after 9 November 1995.\n\nFor Requirement 2: Before 28 February 1997.\n\nThe Compliance for Requirement 1 remains unchanged by this Amendment. This amendment becomes effective on 15 August 1996.\n\nBackground: Several incidents with early production aircraft have shown that when the tension of the aileron cables is lower than specified, the cable turnbuckles can rub against the edges of the structure lightening holes through which they pass.\n\nAmendment 1 reflects changes to the RLD AD at issue 2.\n\nAmendment 2 \\- investigation further to the earlier issues of this Directive has shown that replacement of the wing aileron cables with improved items, will prevent recurrence of the problem that initiated this Directive.\n\nThe original issue of this Airworthiness Directive became effective on 12 October 1995.\n\nAmendment 1 of this Airworthiness Directive became effective on 9 November 1995.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES","sortOrder":0}],"analysis":{"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 2 expanded the Directive from requiring only tension increase/verification to requiring replacement of the wing aileron cables with improved parts. Original AD required tension correction (Requirement 1: increase/verify tension); Amendment 2 adds mandatory replacement per Requirement 2 (replace listed P/Ns in accordance with Fokker S.B. F50‑27‑040) with a later compliance date (before 28 February 1997) and notes replacement/modification per Fokker SB F50‑27‑016 Part 2 as an acceptable means of compliance."},"complexity_factors":["Technical specificity: exact part numbers for replacement (P/Ns F8502‑907‑405, ‑407, ‑409, ‑411, ‑429, ‑431, ‑433, ‑435) require precise inventory and procurement.","Applicability gating: limited to serial numbers 20103–20172 and only those not in compliance with Fokker SB F50‑27‑016 Part 2, creating a records/traceability task.","Two staged requirements: short‑term action (increase/verify cable tension) and longer‑term mandatory replacement with separate compliance deadlines.","Dependency on external documents: compliance depends on following Fokker Service Bulletins (F50‑27‑016 Rev.2 Part 1 and Part 2; F50‑27‑040), so implementers must obtain and follow those AMIs.","Compliance timing: specific deadlines (30 days from 9 Nov 1995 for tension; before 28 Feb 1997 for replacement) impose scheduling and operational downtime considerations.","Acceptable means clause: permits an alternative compliance path (replacement and pulley bracket modification per SB F50‑27‑016 Part 2), which requires technical judgment by maintainers."],"plain_english_summary":"This Airworthiness Directive requires operators of certain Fokker F50 (F27 Mk 50) aeroplanes (S/N 20103–20172 not compliant with Fokker SB F50‑27‑016 Part 2) to increase or verify in‑wing aileron cable tension and, by a later date, replace specified aileron control cables with improved parts. It aims to stop cable turnbuckles rubbing against lightening‑hole edges. Aircraft owners/operators and maintenance organisations must carry out and pay for the inspections, tension adjustments and part replacements in accordance with the referenced Fokker service bulletins within the stated timeframes."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":true,"description":"The original directive (October 1995) was a temporary fix requiring only cable tension adjustments. Amendment 1 (November 1995) tracked changes to the Dutch aviation authority's version. Amendment 2 (August 1996) significantly expanded the scope by adding a mandatory cable replacement requirement based on further investigation showing that tension adjustments alone were insufficient — improved cables were needed to permanently prevent the safety issue. The directive evolved from a monitoring/adjustment regime to a hardware replacement mandate."},"complexity_factors":["Multiple amendment layers (original, Amendment 1, Amendment 2) with different effective dates that must be tracked","Applicability depends on serial number range AND compliance status with previous service bulletins (SB F50-27-016 Part 1 and Part 2)","Two distinct requirements with different compliance deadlines and conditional logic (pre-SB vs post-SB aircraft)","Cross-references to external technical documents: Fokker Service Bulletins F50-27-016 Rev.2 and F50-27-040","Specific part numbers listed (8 different cable part numbers) requiring precise identification","Alternative compliance pathway mentioned (pulley bracket modification as acceptable means of compliance)","Reference to foreign aviation authority directive (RLD AD BLA nr.1995-075/3(A)) for additional context"],"plain_english_summary":"This CASA Airworthiness Directive orders mandatory safety action for early-production Fokker F50s (S/N 20103–20172) to address aileron control cable abrasion risk that could cause loss of roll control. Operators must correct or verify cable tension immediately and replace all wing aileron cables with strengthened parts by 28 Feb 1997. Deadlines: tension checks within 30 days of 9 Nov 1995; amendment effective 15 Aug 1996."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f50-69-amdt-2-in-wing-aileron-control-cables","history":"/api/acts/ad-f50-69-amdt-2-in-wing-aileron-control-cables/history","analysis":"/api/acts/ad-f50-69-amdt-2-in-wing-aileron-control-cables/analysis","conflicts":"/api/acts/ad-f50-69-amdt-2-in-wing-aileron-control-cables/conflicts","importantCases":"/api/acts/ad-f50-69-amdt-2-in-wing-aileron-control-cables/important-cases","documents":"/api/acts/ad-f50-69-amdt-2-in-wing-aileron-control-cables/documents"}}