{"id":"F2006B09795","name":"AD/F28/6 - Flap Actuators - Inspection","slug":"ad-f28-6-flap-actuators-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54715,"registerId":"commonwealth-F2006B09795-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F28/6 - Flap Actuators - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Fokker F28 Series Aeroplanes\n\n \n\nAD/F28/6 Flap Actuators - Inspection NK\n\nApplicability: All models. Document: Fokker SB F28/27-27.\n\nCompliance: As detailed in the requirement document.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD, as presented, applies to all Fokker F28 models and delegates procedural detail to Fokker SB F28/27-27. There is no indication in the text supplied that the scope (who and what is covered) has been altered from its stated terms; the AD's scope is plainly the entire F28 fleet and the specific inspection requirements are contained in the referenced service bulletin."},"complexity_factors":["AD text is short and largely delegates technical detail to an external service bulletin (Fokker SB F28/27-27), requiring readers to obtain that document to determine exact tasks and intervals.","Applicability is broad (\"All models\"), which expands the population affected and can increase operational variation in how inspections are implemented across different operators.","Lack of technical detail in the AD (no intervals, no methods, no corrective-action thresholds) raises implementation ambiguity until the service bulletin is reviewed.","Regulatory context is Part 39 airworthiness directives, which creates legal obligation but the AD itself does not set out enforcement or administrative procedures within the text provided.","Operational impacts (scheduling, downtime, parts supply) depend on the service bulletin's content and on each operator's maintenance system, adding practical complexity beyond the AD's text."],"plain_english_summary":"This is an airworthiness directive titled AD/F28/6 — \"Flap Actuators - Inspection\" issued under the Civil Aviation Regulations (Part 39). Mechanically, it does three things:\n\n- It applies to all Fokker F28 series aeroplanes. [\"Applicability: All models.\"]\n- It requires inspections of the flap actuators, with the specific inspection actions, intervals and any follow-up work set out in a separate requirement document: Fokker Service Bulletin F28/27-27. [\"Document: Fokker SB F28/27-27.\"]\n- It makes compliance mandatory as described in that requirement document. [\"Compliance: As detailed in the requirement document.\"]\n\nWho is affected and who pays\n- Aircraft operators of Fokker F28 series aeroplanes are the parties required to comply (the AD is written to apply to \"all models\"). [Applicability line]\n- Those operators will bear direct costs from carrying out the inspections and any required maintenance or part replacement described in the service bulletin (labour, parts, and aircraft downtime). The AD itself does not set prices or fund the work; it directs that work be done according to the referenced service bulletin. [Compliance and Document lines]\n\nWhat decisions are delegated and where discretion lies\n- The AD delegates the technical detail (what to inspect, how, and how often) to the referenced Fokker service bulletin rather than specifying the procedures in the AD text. That shifts the procedural detail to the manufacturer document. [\"Document: Fokker SB F28/27-27.\" and \"Compliance: As detailed in the requirement document.\"]\n- The AD’s text states applicability broadly (\"All models\"), so operational scope is set at the regulatory level; the AD itself does not narrow applicability by individual variant or serial number. [\"Applicability: All models.\"]\n\nCompliance burden and implementation risks\n- Because the AD refers operators to a separate service bulletin for the detailed requirements, an operator must obtain and follow that bulletin to be compliant. If the bulletin is technical, ambiguous, or requires parts that are scarce, that creates practical compliance tasks and potential delays. [\"Document\" and \"Compliance\" lines]\n- The AD does not specify inspection intervals, corrective action thresholds, or record-keeping in its text; those items are contained only in the referenced service bulletin, so readers need that document to assess the full compliance burden. [\"Compliance: As detailed in the requirement document.\"]\n\nHow this affects private choices and enterprise\n- Operators must incorporate the inspections into their maintenance planning and budgets, which can change scheduling, availability and operating costs for flights using Fokker F28 aircraft. [Applicability and Compliance lines]\n- The manufacturer’s service bulletin supplies the technical method; that concentrates technical control over the inspection method in the manufacturer’s document rather than in the regulator’s AD text. [\"Document: Fokker SB F28/27-27.\"]\n\nNet mechanical effect\n- The directive mandates that inspections be performed in accordance with the cited service bulletin. To understand precise labour, parts, interval and record-keeping implications, one must read Fokker SB F28/27-27 because the AD defers those specifics to that requirement document. [All cited lines]\n\nSource citations: AD title and issuing framework [\"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES\"], AD identifier and title [\"AD/F28/6 Flap Actuators - Inspection NK\"], applicability [\"Applicability: All models.\"], requirement document [\"Document: Fokker SB F28/27-27.\"], and compliance direction [\"Compliance: As detailed in the requirement document.\"]."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused specifically on flap actuator inspections for one aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 150 words)","No defined terms section — relies entirely on external reference to Fokker Service Bulletin SB F28/27-27","No conditional logic or nested exceptions within the directive itself","Simple structure: applicability statement, document reference, and compliance instruction only","Cross-reference is singular and explicit (one service bulletin)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for **Fokker F28 series aircraft**.\n\n**What it does:**\n- Requires operators to inspect the **flap actuators** on these planes. Flap actuators are mechanical devices that control the flaps — the movable surfaces on the wings that help aircraft slow down and land safely.\n- The directive references a specific **Fokker Service Bulletin (SB F28/27-27)** which contains the detailed inspection instructions.\n\n**Who it affects:**\n- Anyone who operates or maintains Fokker F28 series aircraft in Australia.\n\n**Why it matters:**\n- Flap system failures can seriously compromise an aircraft's ability to land safely. This directive ensures potential defects in the flap actuators are identified and fixed before they cause safety problems.\n- Compliance is mandatory — operators must follow the inspection requirements outlined in the referenced service bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f28-6-flap-actuators-inspection","history":"/api/acts/ad-f28-6-flap-actuators-inspection/history","analysis":"/api/acts/ad-f28-6-flap-actuators-inspection/analysis","conflicts":"/api/acts/ad-f28-6-flap-actuators-inspection/conflicts","importantCases":"/api/acts/ad-f28-6-flap-actuators-inspection/important-cases","documents":"/api/acts/ad-f28-6-flap-actuators-inspection/documents"}}