{"id":"F2006B06167","name":"AD/PDH/8 - Oil Transfer Tube Locking - Modification","slug":"ad-pdh-8-oil-transfer-tube-locking-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47001,"registerId":"commonwealth-F2006B06167-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PDH/8 - Oil Transfer Tube Locking - Modification","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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - De Havilland\n\n \n\nAD/PDH/8 Oil Transfer Tube Locking - Modification 6/68\n\nApplicability: All model PD136/212/1, PD170/212/1 and PD175/212/1 propellers fitted to DH114 aircraft.\n\n \n\nDocument: Hawker Siddeley MNS Series 2 BCS No. 88 (Mod. No. 29027). Compliance:  Before installation in an aircraft after 13 June 1968.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1772},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope as a targeted safety modification for specific De Havilland propeller models. It addresses a specific mechanical defect in the oil transfer tube locking system without expanding to broader aircraft systems or other propeller types."},"complexity_factors":["Narrow applicability limited to three specific propeller models on DH114 aircraft only","Single compliance requirement referencing one manufacturer service bulletin","Single, absolute compliance deadline with no conditional triggers or exceptions","No alternative methods of compliance or exemptions specified"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of DH114 aircraft fitted with De Havilland propellers PD136/212/1, PD170/212/1, or PD175/212/1 to modify the oil transfer tube locking mechanism per Hawker Siddeley MNS Series 2 BCS No. 88 (Mod No. 29027). The change must be done before installing any affected propeller if installation occurs after 13 June 1968. It prevents the oil tube coming loose and reduces risk of propeller malfunction and loss of thrust or control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pdh-8-oil-transfer-tube-locking-modification","history":"/api/acts/ad-pdh-8-oil-transfer-tube-locking-modification/history","analysis":"/api/acts/ad-pdh-8-oil-transfer-tube-locking-modification/analysis","conflicts":"/api/acts/ad-pdh-8-oil-transfer-tube-locking-modification/conflicts","importantCases":"/api/acts/ad-pdh-8-oil-transfer-tube-locking-modification/important-cases","documents":"/api/acts/ad-pdh-8-oil-transfer-tube-locking-modification/documents"}}