{"id":"F2008L03697","name":"AD/PA-34/13 - Propeller Damper Screws - Replacement - CANCELLED","slug":"ad-pa-34-13-propeller-damper-screws-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75402,"registerId":"commonwealth-F2008L03697-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-34 (Seneca) Series Aeroplanes","sectionType":"division","heading":"Piper PA-34 (Seneca) Series Aeroplanes","content":"### Piper PA-34 (Seneca) Series Aeroplanes\n\n| AD/PA-34/13 | Propeller Damper Screws - Replacement | 11/2008 |\n| ----------- | ------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                              |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 23 October 2008.                                                                                                                                                                                |\n| Background:  | This unique Australian AD specified replacement of propeller damper screws in accordance with Piper SL No. 706. Compliance was required within 100 hours time in service after July 1974. The AD is no longer required. |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n11 September 2008","sortOrder":0},{"sectionNumber":"AD/PA-34/13","sectionType":"part","heading":"AD/PA-34/13","content":"## AD/PA-34/13","sortOrder":1},{"sectionNumber":"Propeller Damper Screws - Replacement","sectionType":"part","heading":"Propeller Damper Screws - Replacement","content":"## Propeller Damper Screws - Replacement","sortOrder":2},{"sectionNumber":"11/2008","sectionType":"part","heading":"11/2008","content":"## 11/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2206},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The instrument has shifted from an active mandatory safety requirement (imposing maintenance obligations on aircraft owners) to a complete revocation of those obligations. The scope has effectively reduced to zero, serving only as a historical record of the cancellation date."},"complexity_factors":["Single operative provision (cancellation)","No conditional logic or exceptions","No defined terms section","Minimal cross-referencing (only historical reference to previous directive)","Extremely brief (under 100 words of operative text)"],"plain_english_summary":"This document officially cancels a previous aviation safety rule affecting specific aircraft.\n\n**What it was**: This cancels **Airworthiness Directive AD/PA-34/13**, which previously required owners of **Piper PA-34 (Seneca)** twin-engine aeroplanes to replace special screws (called \"propeller damper screws\") in the propeller assembly.\n\n**The history**: The original rule, issued in 1974, required aircraft owners to complete this replacement within 100 hours of flying time, following manufacturer instructions (Piper Service Letter No. 706).\n\n**What happens now**: As of **23 October 2008**, this maintenance requirement no longer applies. The Civil Aviation Safety Authority (CASA) has determined these specific screw replacements are no longer necessary for safe flight operations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement-cancelled","history":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement-cancelled/history","analysis":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement-cancelled/analysis","conflicts":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement-cancelled/important-cases","documents":"/api/acts/ad-pa-34-13-propeller-damper-screws-replacement-cancelled/documents"}}