{"id":"F2006B06171","name":"AD/PFP/13 Amdt 3 - McCauley 1A170 Propeller Hub - Inspection","slug":"ad-pfp-13-amdt-3-mccauley-1a170-propeller-hub-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47010,"registerId":"commonwealth-F2006B06171-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PFP/13 Amdt 3 - McCauley 1A170 Propeller Hub - Inspection","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPropellers \\- Fixed Pitch\n\nAD/PFP/13\n\nAmdt 3\n\n  \nMcCauley 1A170 Propeller Hub \\- Inspection 4/83\n\nApplicability: All aircraft fitted with Lycoming 0-360 Series engines/ McCauley 1A170/FFA fixed pitch propeller combination.\n\nRequirement: 1. Remove propeller from the aircraft and remove spacer from the propeller.\n\n    2. Thoroughly remove and clean all paint material down to the anodised surface and inspect the centre relief bore (hole), all mounting bolt holes, and all external surfaces in the entire propeller hub area (faces and sides) for cracks using dye penetrant inspection methods.\n\n    3. If a crack is found, replace the propeller with a serviceable propeller before further flight.\n\nCompliance: (a) For propellers with 190 or more hours time in service since new, or since the last dye penetrant inspection in accordance with this requirement, inspect within the next 25 hours time in service after 30th April 1983 and each succeeding 200 hours time in service thereafter.\n\n    (b) For propellers with less than 190 hours time in service since new, or since the last dye penetrant inspection in accordance with this requirement, inspect at the next maintenance release inspection or within the next 25 hours time in service, whichever occurs first and each succeeding 200 hours time in service thereafter.\n\n    (c) For propellers inspected in accordance with AD/PFP/13B inspect at 200 hours time in service after the last dye penetrant inspection and each succeeding 200 hours time in service thereafter.\n\nBackground: AD/PFP/13 thru 13B applied only to specific propeller serial numbers on a specific type aircraft. The FAA advise that this condition may exist and further develop on other installations fitted with these propellers. This Directive has been further raised in issue to reflect this.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Earlier AD/PFP/13 through 13B applied only to specific propeller serial numbers on a specific aircraft type; this amendment broadens the scope to cover all aircraft fitted with the Lycoming 0‑360 series engine / McCauley 1A170 / FFA fixed‑pitch propeller combination, following FAA advice that the condition may exist on other installations."},"complexity_factors":["Technical inspection method required (dye penetrant) and need to remove spacer/propeller before inspection","Surface preparation requirement (remove paint to anodised surface) to ensure inspection effectiveness","Multiple conditional compliance timings based on hours-in-service bands (>=190 hrs, <190 hrs, and prior AD/PFP/13B inspections)","Mandatory replacement action if a crack is found (no on‑wing repair alternative allowed)","Cross-reference to previous ADs (AD/PFP/13 through 13B) and FAA advice expanding applicability","Operational impact on maintenance scheduling due to short initial inspection windows (next maintenance release or within 25 hours)"],"plain_english_summary":"This directive requires removal of McCauley 1A170/FFA fixed‑pitch propellers fitted to Lycoming 0‑360 series engines, stripping paint to the anodised surface and carrying out dye‑penetrant inspections of the hub (centre relief bore, mounting bolt holes and external faces). Any propeller found cracked must be replaced before further flight. It applies to all aircraft with this engine/propeller combination and sets an initial inspection timing based on hours in service, then a recurring 200‑hour inspection interval."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment (Amdt 3) significantly expanded the scope from the original directive. The original AD/PFP/13 through 13B only applied to 'specific propeller serial numbers on a specific type aircraft' — essentially a narrow, targeted recall. Amendment 3 broadened this to cover ALL aircraft fitted with the Lycoming O-360/McCauley 1A170 propeller combination, reflecting new safety intelligence from the FAA that the cracking defect could develop across the entire fleet using this hardware, not just the originally identified serial numbers."},"complexity_factors":["Short, single-purpose directive with clear mechanical requirements","Only 3 defined compliance pathways based on flight hours and prior inspection history","Minimal cross-referencing (only refers to previous directive AD/PFP/13B for one compliance category)","Straightforward conditional logic (if crack found → replace propeller)","No nested exceptions or complex definitional sections","Technical but accessible language — assumes aviation maintenance knowledge but doesn't require legal interpretation"],"plain_english_summary":"This mandatory CASA airworthiness directive requires operators of aircraft with Lycoming O‑360 engines fitted with McCauley 1A170 fixed‑pitch propellers to remove the propeller, strip paint and perform a dye‑penetrant inspection of the hub, and to replace any propeller found cracked before further flight.  \n\nCompliance schedules vary by accumulated hours (immediate short‑term inspections for higher‑time blades, earlier checks for low‑time blades, then recurring inspections), because hub cracks can cause catastrophic in‑flight failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pfp-13-amdt-3-mccauley-1a170-propeller-hub-inspection","history":"/api/acts/ad-pfp-13-amdt-3-mccauley-1a170-propeller-hub-inspection/history","analysis":"/api/acts/ad-pfp-13-amdt-3-mccauley-1a170-propeller-hub-inspection/analysis","conflicts":"/api/acts/ad-pfp-13-amdt-3-mccauley-1a170-propeller-hub-inspection/conflicts","importantCases":"/api/acts/ad-pfp-13-amdt-3-mccauley-1a170-propeller-hub-inspection/important-cases","documents":"/api/acts/ad-pfp-13-amdt-3-mccauley-1a170-propeller-hub-inspection/documents"}}