{"id":"F2006B05884","name":"AD/PA-34/13 - Propeller Damper Screws - Replacement","slug":"ad-pa-34-13-propeller-damper-screws-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135932,"registerId":"commonwealth-F2006B05884-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/13 - Propeller Damper Screws - Replacement","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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Piper PA-34 (Seneca) Series Aeroplanes\n\n \n\nAD/PA-34/13 Propeller Damper Screws - Replacement 7/74\n\nApplicability: Model PA34-200 with S/Nos. 34-725001 to 34-7350320 that have installed Propeller Damper Installation Kit as per Piper SL No. 677A.\n\n \n\nModel PA34-200 with S/Nos. 34-7350321 to 34-7450002, 34-7450004 to\n\n34-7450063, 34-7450065 to 34-7450073, 34-7450075 to 34-7450085, 34-7450088,\n\n34-7450090, 34-7450093 to 34-7450095, 34-7450097, 34-7450099, 34-7450101,\n\n34-7450104, to 34-7450106, 34-7450108 to 34-7450110.\n\n \n\nDocument: Piper SL No. 706.\n\n \n\nCompliance: Within 100 hours time in service after 31 July 1974.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1356},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: mandating the replacement of propeller damper screws on the specific affected aircraft models. There is no expansion into broader operational or maintenance requirements."},"complexity_factors":["Highly fragmented serial number applicability with multiple non-consecutive ranges and specific exclusions","Dependence on external technical documents (Piper SL No. 706 and SL No. 677A) for full compliance instructions","Single, clearly defined compliance action with a specific time-in-service deadline"],"plain_english_summary":"This is a **safety directive** that requires owners of specific Piper PA-34 Seneca aircraft to replace the propeller damper screws.\n\n**Who it affects:**\n*   Owners of Model PA34-200 aircraft with specific serial numbers (ranging from 34-725001 to 34-7450110, with several gaps and exclusions in the sequence)\n*   Only applies if the aircraft has a specific \"Propeller Damper Installation Kit\" installed (as per Piper Service Letter No. 677A)\n\n**What must be done:**\n*   Replace the propeller damper screws following the technical instructions in **Piper Service Letter No. 706**\n*   Complete the work within **100 hours of flying time** after 31 July 1974\n\n**Why it matters:**\nThis prevents potential mechanical failures in the propeller damping system, which could affect flight safety. It is legally binding under the Civil Aviation Regulations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement","history":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement/history","analysis":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement/analysis","conflicts":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement/conflicts","importantCases":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement/important-cases","documents":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement/documents"}}