{"id":"F2006B06291","name":"AD/PMC/36 Amdt 1 - Propeller Blade Shank - Inspection","slug":"ad-pmc-36-amdt-1-propeller-blade-shank-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47367,"registerId":"commonwealth-F2006B06291-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PMC/36 Amdt 1 - Propeller Blade Shank - 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 \\- Variable Pitch \\- McCauley\n\nAD/PMC/36\n\nAmdt 1\n\n  \nPropeller Blade Shank \\- Inspection 3/83\n\nApplicability: Propeller models 2A34C201, 2A34C203, 2A34C216, B2D34C207, B2D34C214, B2D34C217, B2D34C218, B2D34C219, B2D34C220, C2A34C204, D2AF34C308, D2AF34C310, D3A34C401, D3A34C402, D3A34C403, D3A34C404 with S/Nos.\n\nbeginning 79, 80, 81 and 82 fitted with blade model 78TCA-0, 80VA-0, 80VHA-3.5, 90DA-8, 90DCA-2, 90DCA-8, 90DCA-10, 90DCA-14, 90DCB-8, 90DEA-12,\n\n90DFA-10, 90DHB-8, 90DHB-16E with S/Nos. detailed in the compliance document.\n\nFor propeller models prior to the above listed S/Nos. the propeller log book should be checked to ensure that they have not undergone blade replacement which may be affected by this Directive.\n\nDocument: 1. McCauley SB 146; and\n\n2. McCauley SB 146-1.\n\nCompliance: Part 1: All propeller and blade models listed in McCauley SB 146, within 25 hours time in service after 23rd December 1982 unless previously accomplished.\n\nPart 2: All propeller and blade models listed in McCauley SB 146-1 \\- within 25 hours time in service after 7th February, 1983 unless previously accomplished.\n\nBackground: The manufacturer advises of the need to inspect affected blades for forging folds or fatigue cracks.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is an amendment (Amdt 1) to an existing Airworthiness Directive. The scope remains tightly focused on the original safety issue — blade shank inspections for specific McCauley propellers. The amendment appears to add Part 2 (referencing SB 146-1) to expand coverage to additional blade models or inspection requirements identified after the original directive, but this is a natural evolution of the safety response rather than scope creep beyond aviation safety."},"complexity_factors":["Extensive model and serial number cross-referencing required (16 propeller models, 13 blade models, 4 serial number prefixes)","Two-tier compliance structure with different deadlines based on which service bulletin applies","Conditional applicability for older propellers requiring logbook verification","Technical aviation terminology requiring reference to external manufacturer documents (SB 146 and SB 146-1)","Time-in-service calculation rather than calendar dates for compliance"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections of certain McCauley variable‑pitch propellers for forging folds and fatigue cracks in the blade shanks. It applies to specified propeller and blade models with serial numbers beginning 79–82 (and earlier units with relevant blade replacements) and requires inspections within the short flight‑hour deadlines set by the manufacturer’s Service Bulletins. It’s aimed at preventing blade‑separation in flight and ensuring continued airworthiness."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This instrument is labelled 'Amdt 1' to AD/PMC/36, indicating it amends a prior directive. The amendment as published specifies affected models/serial numbers, references McCauley SB 146 and SB 146-1 for procedures and lists, and sets two compliance parts with 25‑hour actions (Applicability; Document; Compliance). The source text does not state how this version differs from the prior AD, only that it is an amendment."},"complexity_factors":["Applicability defined by many specific propeller and blade model numbers and serial-number ranges (Applicability section).","Two separate compliance deadlines (Part 1 and Part 2) with different effective dates and the same 25-hour inspection window (Compliance: Part 1; Part 2).","Requirement to check propeller log books for prior blade replacements to determine applicability adds administrative burden (Applicability).","Dependence on external manufacturer documents for inspection procedures and detailed serial-number lists (McCauley SB 146 and SB 146-1; 'Document').","Short compliance window (25 hours TIS) increases operational disruption and scheduling pressure (Compliance).","Remedy scope implicit (inspect and correct defects) but the AD does not detail repair procedures; operators must follow referenced service bulletins or other approved actions (Document; Background)."],"plain_english_summary":"This airworthiness directive mandates inspections of listed McCauley variable‑pitch propeller blades and shanks for forging folds or fatigue cracks. It applies to specified propeller and blade models and serial numbers, requires inspection within 25 hours time‑in‑service after the stated dates, and places responsibility on aircraft owners/operators to arrange and fund inspections and any corrective work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pmc-36-amdt-1-propeller-blade-shank-inspection","history":"/api/acts/ad-pmc-36-amdt-1-propeller-blade-shank-inspection/history","analysis":"/api/acts/ad-pmc-36-amdt-1-propeller-blade-shank-inspection/analysis","conflicts":"/api/acts/ad-pmc-36-amdt-1-propeller-blade-shank-inspection/conflicts","importantCases":"/api/acts/ad-pmc-36-amdt-1-propeller-blade-shank-inspection/important-cases","documents":"/api/acts/ad-pmc-36-amdt-1-propeller-blade-shank-inspection/documents"}}