{"id":"F2006B06287","name":"AD/PMC/32 Amdt 1 - Threadless Propeller Hub - Inspection","slug":"ad-pmc-32-amdt-1-threadless-propeller-hub-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47355,"registerId":"commonwealth-F2006B06287-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PMC/32 Amdt 1 - Threadless 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 \\- Variable Pitch \\- McCauley\n\nAD/PMC/32\n\nAmdt 1\n\n  \nThreadless Propeller Hub \\- Inspection 8/78\n\nApplicability: D2AF34C305 propellers fitted to the rear engine of Cessna model T337G, T337H and P337H aircraft, which have not been modified in accordance with McCauley SB No. 132.\n\nDocument: McCauley SB No. 128.\n\nCompliance: For Para. 1.1 \\- At each daily or overnight inspection, conduct a visual inspection of the hub in accordance with Part 1 of the document.\n\nFor Para. 11.1 \\- Within 100 hours time in service, after 24 June 1977 and thereafter at periods not exceeding 100 hours time in service, inspect the hub in accordance with Part 11B of the document.\n\n2. At any time the propeller is removed from the engine, inspect the hub in accordance with Part 11C of the document.\n\nNote: The inspection detailed in Part 1 of the document shall be entered on the maintenance release as maintenance required. The inspection may be performed by the pilot in command, in which case certification is not required. In all other cases certification may be made on the maintenance release. This inspection may also be performed and certified by any Licensed Aircraft maintenance Engineer.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It targets a specific mechanical defect in a specific propeller model on specific Cessna aircraft variants. The amendment appears to refine or clarify inspection intervals rather than expand coverage to new aircraft types or propeller models."},"complexity_factors":["Single, narrow applicability clause targeting specific propeller model on specific aircraft","Only 3 compliance requirements with clear time triggers (daily/overnight, 100-hour intervals, removal event)","No defined terms section; all technical terms reference external manufacturer document (McCauley SB No. 128)","Minimal conditional logic — straightforward 'if applicable, then inspect' structure","Single amendment (Amdt 1) to original directive AD/PMC/32, suggesting limited evolution","Note section provides practical guidance without creating additional legal obligations"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections of McCauley D2AF34C305 rear propeller hubs on certain Cessna T337G/H and P337H aircraft that haven’t been upgraded per the manufacturer. It requires daily/overnight visual checks (pilots may do these) plus periodic detailed inspections and checks when the propeller is removed, carried out by qualified maintenance personnel.\n\nIt addresses cracking and fatigue in a batch of threadless hubs to prevent catastrophic hub failure and loss of control."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The instrument is titled 'Amdt 1', so it amends AD/PMC/32. The text prescribes required inspections (daily/overnight visual checks, 100‑hour detailed inspections, and inspection on propeller removal) and allocates certification responsibilities (pilot for daily check; maintenance release or Licensed Aircraft Maintenance Engineer for others). The pre‑amendment text is not included here, so the precise differences from the original AD cannot be determined from this document alone."},"complexity_factors":["Narrow technical applicability to D2AF34C305 propellers on specific Cessna models (Applicability)","Cross‑references to external service documents (McCauley SB No.128 and SB No.132) and to parts within that document (Part 1, Part 11B, Part 11C)","Multiple inspection triggers and frequencies: daily/overnight visual checks (Para.1.1), 100‑hour inspections (Para.11.1), and inspection when the propeller is removed (Para.2)","Differentiated certification rules and record‑keeping: pilot‑performable checks without certification vs. maintenance release certification or LAME sign‑off (Note)","Temporal compliance detail (e.g. 'within 100 hours after 24 June 1977') that requires checking service history and flight hours","Operational impact limited but specific: inspection tasks may vary in technical depth depending on which Part of the external document is invoked"],"plain_english_summary":"This airworthiness directive requires inspections of D2AF34C305 threadless propeller hubs on rear‑engine Cessna T337G, T337H and P337H aircraft not modified per McCauley SB No. 132: a visual check at each daily/overnight inspection, a detailed inspection every 100 hours, and an inspection whenever the propeller is removed.\n\nPilots may perform and log the daily visual check without certification; all other inspections must be certified on the maintenance release and may be performed and certified by a Licensed Aircraft Maintenance Engineer. Operators bear the time and maintenance costs of compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pmc-32-amdt-1-threadless-propeller-hub-inspection","history":"/api/acts/ad-pmc-32-amdt-1-threadless-propeller-hub-inspection/history","analysis":"/api/acts/ad-pmc-32-amdt-1-threadless-propeller-hub-inspection/analysis","conflicts":"/api/acts/ad-pmc-32-amdt-1-threadless-propeller-hub-inspection/conflicts","importantCases":"/api/acts/ad-pmc-32-amdt-1-threadless-propeller-hub-inspection/important-cases","documents":"/api/acts/ad-pmc-32-amdt-1-threadless-propeller-hub-inspection/documents"}}