{"id":"F2006B06184","name":"AD/PFT/1 - Model FS200-1 Propeller Spinners - Replacement of Bolts","slug":"ad-pft-1-model-fs200-1-propeller-spinners-replacement-of-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47039,"registerId":"commonwealth-F2006B06184-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PFT/1 - Model FS200-1 Propeller Spinners - Replacement of Bolts","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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - Flottorp\n\n \n\nAD/PFT/1  Model FS200-1 Propeller Spinners - Replacement of Bolts\n\n\n8/84\n\n \n\nApplicability: All Flottorp F12A-3 and F12A-5 series propellers fitted with F200-1 spinners.\n\n \n\nRequirement: 1. Remove the six AN4H-7A bolts attaching the 248-1 spinner bulkhead to the propeller flange and re-install six shorter AN4H-6A bolts. The old AN960-416L washers may be re-used.\n\n \n\n2. Torque bolts to 70 to 90 inch pounds. Safety wire all bolt heads with MS20995- C32 safety wire.\n\n \n\nor FAA AD 64-7-3.\n\n \n\nCompliance: Forthwith.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific propeller models. It has not expanded beyond its original technical purpose."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined part numbers in the requirement (AN4H-7A, AN4H-6A, AN960-416L, MS20995-C32 — though these are hardware specifications rather than legal defined terms)","Single applicability criterion with clear model numbers","Simple two-step mechanical procedure with one alternative compliance pathway (FAA AD reference)","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific aircraft propellers to replace certain bolts immediately.\n\n**What it covers:**\n- **Which propellers:** Flottorp F12A-3 and F12A-5 series propellers that have F200-1 spinners attached\n- **What must be done:**\n  1. Remove six specific bolts (AN4H-7A) that attach the spinner bulkhead to the propeller flange\n  2. Replace them with six shorter bolts (AN4H-6A) — the old washers can be reused\n  3. Tighten the new bolts to between 70 and 90 inch-pounds of torque\n  4. Secure all bolt heads with safety wire (MS20995-C32)\n\n**Alternative compliance:** Instead of following these specific instructions, operators can comply with an equivalent American directive (FAA AD 64-7-3).\n\n**When:** Immediately (\"forthwith\" means without delay).\n\n**Why it matters:** This directive addresses a safety defect — likely that the original bolts were too long and could cause mechanical failure or interference. Airworthiness directives are legally binding; failure to comply can ground an aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive does not broaden or narrow the population of affected equipment beyond what it states. It applies to \"All Flottorp F12A‑3 and F12A‑5 series propellers fitted with F200‑1 spinners\" and mandates a specific maintenance action (replace six bolts with shorter bolts, torque, and safety‑wire) to be done immediately. The instrument is a targeted, operational requirement rather than a change in regulatory scope or coverage. (See: Applicability; Requirement; Compliance.)"},"complexity_factors":["Narrow technical scope limited to specific propeller models and spinner assembly (Applicability).","Prescriptive parts and fastener specifications (AN4H‑7A, AN4H‑6A, AN960‑416L; MS20995‑C32) increase technical precision required (Requirement 1 and 2).","Specific torque range required (70–90 inch‑pounds) requires calibrated tools and competent personnel (Requirement 2).","Immediate timing: \"Forthwith\" compliance increases scheduling pressure and potential downtime (Compliance).","Optional alternative compliance via FAA AD 64‑7‑3 introduces a jurisdictional/technical cross‑reference (Requirement / FAA AD reference)."],"plain_english_summary":"This AD mandates immediate replacement of the six AN4H‑7A bolts that secure the 248‑1 spinner bulkhead on Flottorp F12A‑3 and F12A‑5 propellers with F200‑1 spinners, using shorter AN4H‑6A bolts (washers may be reused), torqued to 70–90 in‑lb and safety‑wired. An FAA AD is offered as an alternative compliance route.\n\nIt affects owners/operators of all such propellers, imposes direct labour and downtime costs, and requires qualified maintenance and tooling to perform the prescriptive, time‑critical task."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pft-1-model-fs200-1-propeller-spinners-replacement-of-bolts","history":"/api/acts/ad-pft-1-model-fs200-1-propeller-spinners-replacement-of-bolts/history","analysis":"/api/acts/ad-pft-1-model-fs200-1-propeller-spinners-replacement-of-bolts/analysis","conflicts":"/api/acts/ad-pft-1-model-fs200-1-propeller-spinners-replacement-of-bolts/conflicts","importantCases":"/api/acts/ad-pft-1-model-fs200-1-propeller-spinners-replacement-of-bolts/important-cases","documents":"/api/acts/ad-pft-1-model-fs200-1-propeller-spinners-replacement-of-bolts/documents"}}