{"id":"F2006B05007","name":"AD/CESSNA 177/12 Amdt 1 - Upper Door Pillar","slug":"ad-cessna-177-12-amdt-1-upper-door-pillar","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44917,"registerId":"commonwealth-F2006B05007-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 177/12 Amdt 1 - Upper Door Pillar","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)  Cessna 177 Series Aeroplanes\n\n \n\nAD/CESSNA 177/12\n\nAmdt 1\n\n\nUpper Door Pillar 1/72\n\n \n\nApplicability: All models not modified in accordance with Cessna SL SE72-21 or Rex Aviation Drg. RA-C-1258, which have exceeded 500 hours time in service.\n\n \n\nRequirement: Inspect the front door pillars in the vicinity of aileron pulley bracket for cracks.\n\n \n\nCompliance: Within 100 hours time in service after 28 January 1972 and thereafter at intervals not exceeding 100 hours time in service.\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\nFederal Register of Legislative Instruments F2006B05007\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2179},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Amendment 1 maintains the original narrow scope focused solely on door pillar inspections for the Cessna 177 series. There is no indication of scope creep; the instrument remains a targeted safety directive addressing a specific airworthiness concern without expanding to unrelated aircraft systems or models."},"complexity_factors":["Very short length (single page, three sections)","Minimal conditional logic (only one exemption criteria based on previous modifications and flight hours)","References to external technical documents (Cessna Service Letter and Rex Aviation Drawing) requiring specialized knowledge to interpret","Technical terminology ('time in service', 'aileron pulley bracket') not defined within the instrument itself"],"plain_english_summary":"This AD requires owners/operators of Cessna 177 aircraft that have exceeded 500 hours (and have not been modified per Cessna SL SE72-21 or Rex Aviation RA‑C‑1258) to inspect the front door pillar area around the aileron pulley bracket for cracks. An initial inspection is required within 100 flight hours after 28 Jan 1972 and must be repeated at 100‑hour intervals. Cracked pillars can compromise fuselage integrity and risk structural failure in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-177-12-amdt-1-upper-door-pillar","history":"/api/acts/ad-cessna-177-12-amdt-1-upper-door-pillar/history","analysis":"/api/acts/ad-cessna-177-12-amdt-1-upper-door-pillar/analysis","conflicts":"/api/acts/ad-cessna-177-12-amdt-1-upper-door-pillar/conflicts","importantCases":"/api/acts/ad-cessna-177-12-amdt-1-upper-door-pillar/important-cases","documents":"/api/acts/ad-cessna-177-12-amdt-1-upper-door-pillar/documents"}}