{"id":"F2006B05976","name":"AD/PA-42/10 - Stall/Flow Strip","slug":"ad-pa-42-10-stall-flow-strip","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136171,"registerId":"commonwealth-F2006B05976-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-42/10 - Stall/Flow Strip","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-42/10 Stall/Flow Strip 8/85\n\nApplicability: All model PA-42 with S/Nos 42-8001004 to 42-8001106. Requirement:  Piper SB No. 807.\n\nCompliance: Within 100 hours time in service after 31 August 1985. Background: Stall/flow strips have been incorrectly positioned on some aircraft.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2077},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly scoped to its original purpose: correcting a specific airworthiness issue (incorrectly positioned stall/flow strips) on a limited range of aircraft serial numbers. It has not expanded to cover other models or unrelated safety issues."},"complexity_factors":["Very short, single-issue directive with narrow serial-number-specific applicability","Requires cross-reference to external technical document (Piper Service Bulletin 807) for actual implementation steps","Uses technical aviation terminology ('time in service', 'stall/flow strips') requiring specialized knowledge to interpret fully"],"plain_english_summary":"This **Airworthiness Directive** (a mandatory safety order from the aviation regulator) requires owners of specific Piper Cheyenne III aircraft to fix a dangerous manufacturing defect.\n\n**Who is affected**\nOwners and operators of Piper PA-42 model aircraft with serial numbers between 42-8001004 and 42-8001106.\n\n**What must be done**\nYou must follow the instructions in **Piper Service Bulletin No. 807**. This involves correcting the position of **stall/flow strips** — small aerodynamic devices installed on the wings that ensure the aircraft stalls (loses lift) in a predictable, safe manner. Some aircraft left the factory with these strips incorrectly positioned, creating a safety hazard.\n\n**When**\nThe work must be completed within 100 hours of flight time after 31 August 1985.\n\n**Why this matters**\nIncorrectly positioned stall strips can change how the aircraft behaves at slow speeds, potentially causing unexpected stalls during critical phases of flight like takeoff or landing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-42-10-stall-flow-strip","history":"/api/acts/ad-pa-42-10-stall-flow-strip/history","analysis":"/api/acts/ad-pa-42-10-stall-flow-strip/analysis","conflicts":"/api/acts/ad-pa-42-10-stall-flow-strip/conflicts","importantCases":"/api/acts/ad-pa-42-10-stall-flow-strip/important-cases","documents":"/api/acts/ad-pa-42-10-stall-flow-strip/documents"}}