{"id":"F2006B06289","name":"AD/PMC/34 - Blade Actuating Pin Screws - Replacement","slug":"ad-pmc-34-blade-actuating-pin-screws-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47360,"registerId":"commonwealth-F2006B06289-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PMC/34 - Blade Actuating Pin Screws - Replacement","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/34 Blade Actuating Pin Screws \\- Replacement 5/78\n\nApplicability: C200, C300, C400 and C500 series “threadless” models as listed in the requirement.\n\nRequirement: 1. For propeller models 3FF32C501 fitted to Cessna 421C or 404 aircraft, and listed by S/No. in McCauley SB No. 131, modify in accordance with that SB.\n\n    2. For propeller models D3A34C401 and D3A34C402 fitted to Cessna TU206G, T207A, T210M aircraft, and listed by S/No. in McCauley SB No. 129, modify in accordance with that SB.\n\n    3. For all other C200, C300, C400 and C500 series “threadless” hubs, modify in accordance with McCauley SL No. 1978-3.\n\nCompliance: For Para. 1 \\- Within 100 hours time in service after 31 May 1978\\. For Para. 2 \\- Within 100 hours time in service after 31 May 1978.\n\nFor Para. 3 \\- Before installation on an aircraft following the next recondition conducted after 31 May 1978.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2104},"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive remains focused on its original purpose of mandating safety modifications to blade actuating pin screws on specific McCauley propeller models. While it establishes three distinct implementation pathways based on propeller model and aircraft type, it does not expand beyond the original technical safety issue."},"complexity_factors":["Requires cross-referencing external technical documents (McCauley Service Bulletins 129, 131 and Service Letter 1978-3) not reproduced in the directive","Three-tiered applicability matrix with different compliance deadlines for each category","Technical aviation terminology requiring specialized domain knowledge (e.g., 'time in service', 'recondition', 'threadless hubs')","Serial-number-specific limitations requiring manual verification against manufacturer lists"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators and mechanics of aircraft with certain McCauley C200–C500 series \"threadless\" propeller hubs to replace or modify blade actuating pin screws to prevent propeller/mechanical failure and possible accidents.  \n\nCompliance deadlines: affected Cessna propellers listed in McCauley Service Bulletins must be modified within 100 flight hours after May 31, 1978; all other threadless hubs must be modified at their next reconditioning after that date."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pmc-34-blade-actuating-pin-screws-replacement","history":"/api/acts/ad-pmc-34-blade-actuating-pin-screws-replacement/history","analysis":"/api/acts/ad-pmc-34-blade-actuating-pin-screws-replacement/analysis","conflicts":"/api/acts/ad-pmc-34-blade-actuating-pin-screws-replacement/conflicts","importantCases":"/api/acts/ad-pmc-34-blade-actuating-pin-screws-replacement/important-cases","documents":"/api/acts/ad-pmc-34-blade-actuating-pin-screws-replacement/documents"}}