{"id":"F2006B05989","name":"AD/PA-42/22 - Upper Main Landing Gear Housing Lower Side Brace Link Lug","slug":"ad-pa-42-22-upper-main-landing-gear-housing-lower-side-brace-link-lug","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136204,"registerId":"commonwealth-F2006B05989-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-42/22 - Upper Main Landing Gear Housing Lower Side Brace Link Lug","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-42 (Cheyenne III) Series Aeroplanes\n\n \n\nAD/PA-42/22 Upper Main Landing Gear Housing Lower\n\nSide Brace Link Lug\n\n\n5/95\n\n \n\nApplicability: Piper PA-42 Cheyenne III, PA-42-720 Cheyenne IIIA and PA42-720R Cheyenne IIIA with serial numbers listed in Piper Service Bulletin (SB) 969.\n\n \n\nRequirement: Carry out a dye penetrant inspection of the main landing gear upper housing in accordance with Piper SB 969.\n\n \n\nCompliance: In accordance with the thresholds and intervals specified in Piper SB 969.\n\n \n\nInstallation of new P/N 57680-09 main landing gear upper housing cancels the inspection requirements of this AD.\n\n \n\nBackground:  Reports have been received that small cracks are developing in the sharp radius at the lower side brace link lugs.\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":1532},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains narrowly focused on its original purpose of addressing crack formation in the lower side brace link lugs of specific Piper aircraft landing gear assemblies."},"complexity_factors":["Delegates all substantive technical requirements to an external document (Piper Service Bulletin 969) which is not reproduced","Uses specialized aviation engineering terminology (dye penetrant inspection, side brace link lugs, serial number ranges)","Contains conditional logic (installation of specific part number cancels the inspection obligations)"],"plain_english_summary":"This mandatory safety order requires owners/operators of certain Piper PA-42 Cheyenne III/IIIA aircraft (specific serials per Piper Service Bulletin 969) to perform dye-penetrant inspections of the main landing gear upper housing—focusing on the lower side brace link lugs—at intervals set in that Service Bulletin. It’s intended to detect small corner cracks that could lead to gear failure. Installing a new housing, P/N 57680-09, cancels the inspection requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-42-22-upper-main-landing-gear-housing-lower-side-brace-link-lug","history":"/api/acts/ad-pa-42-22-upper-main-landing-gear-housing-lower-side-brace-link-lug/history","analysis":"/api/acts/ad-pa-42-22-upper-main-landing-gear-housing-lower-side-brace-link-lug/analysis","conflicts":"/api/acts/ad-pa-42-22-upper-main-landing-gear-housing-lower-side-brace-link-lug/conflicts","importantCases":"/api/acts/ad-pa-42-22-upper-main-landing-gear-housing-lower-side-brace-link-lug/important-cases","documents":"/api/acts/ad-pa-42-22-upper-main-landing-gear-housing-lower-side-brace-link-lug/documents"}}