{"id":"F2006B05355","name":"AD/P68/28 Amdt 3 - Engine Mount Fittings","slug":"ad-p68-28-amdt-3-engine-mount-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45893,"registerId":"commonwealth-F2006B05355-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P68/28 Amdt 3 - Engine Mount Fittings","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)  Partenavia P68 Series Aeroplanes\n\n \n\n# AD/P68/28\n\nAmdt 3\n\nApplicability: All models.\n\n# Engine Mount Fittings 13/89\n\n \n\nRequirement: Action in accordance with Partenavia SB No 70 Rev 1.\n\n \n\nNote: Para 1-13B of the Requirement document specifies 75/1000 of local thickness,\n\ne.g. if local thickness is 3 mm (0.125\") then max allowable corrosion depth is 0.24 mm (0.009\").\n\n \n\nCompliance: Section 1: Unless already accomplished in accordance with the Requirement; prior to the issue of the next Maintenance Release after 25 October 1989, or prior to five calendar years since the date of manufacture. Thereafter in accordance with Section 3.\n\n \n\nSection 3: Every 500 hours time in service or two (2) years, whichever occurs first, after compliance with Section 1.\n\n \n\nBackground: Reports of corrosion and extensive cracking of the engine mount attachment fittings have been received. Amendment 3 clarifies the 75/1000 allowable corrosion depth and calls for a re-inspection where 1.9 mm (0.075\") may have been used as the acceptance/rejection criterion.\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":1956},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment clarifies the precise measurement standard for corrosion tolerance (75/1000 of local thickness versus an incorrect fixed 1.9 mm) and mandates re-inspection where the wrong standard may have been applied, but it remains strictly within the original scope of ensuring engine mount fitting integrity."},"complexity_factors":["Short, single-issue directive with clear mechanical focus","Requires cross-reference to external technical document (Partenavia Service Bulletin No. 70 Rev 1)","Technical aviation terminology requires domain knowledge (Maintenance Release, time in service, Service Bulletin)","Mathematical calculation required for compliance (75/1000 ratio of local thickness)"],"plain_english_summary":"This AD requires owners/operators of Partenavia P68 aircraft to inspect engine mount fittings per Partenavia Service Bulletin No. 70 Rev 1 for corrosion and cracking, using a maximum allowable corrosion depth of 7.5% of local metal thickness. Initial and recurring inspections (first before next Maintenance Release or within five years, then every 500 flight hours or two years) are mandated to prevent engine separation. Amendment 3 clarifies the proportional 7.5% standard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-p68-28-amdt-3-engine-mount-fittings","history":"/api/acts/ad-p68-28-amdt-3-engine-mount-fittings/history","analysis":"/api/acts/ad-p68-28-amdt-3-engine-mount-fittings/analysis","conflicts":"/api/acts/ad-p68-28-amdt-3-engine-mount-fittings/conflicts","importantCases":"/api/acts/ad-p68-28-amdt-3-engine-mount-fittings/important-cases","documents":"/api/acts/ad-p68-28-amdt-3-engine-mount-fittings/documents"}}