{"id":"F2006B06419","name":"AD/R22/12 Amdt 2 - Upper Steel Tube Frames","slug":"ad-r22-12-amdt-2-upper-steel-tube-frames","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47784,"registerId":"commonwealth-F2006B06419-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R22/12 Amdt 2 - Upper Steel Tube Frames","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)  Robinson R22 Series Helicopters\n\n \n\nAD/R22/12\n\nAmdt 2\n\n\nUpper Steel Tube Frames 11/86\n\n \n\nApplicability: All models with S/Nos. 0002 to 0311 having A020-2 steel tube frames S/Nos. 0002 to 0399 installed.\n\n \n\nRequirement: Inspect in accordance with Robinson S.B. No. 47.\n\n \n\nCompliance: Within 50 hours time in service after 31 May 1986 and thereafter as detailed in the Requirement Document.\n\n \n\nBackground: Service Bulletin No. 47 supersedes S.B.’s 3, 18 and 23; and requires inspection of all welded areas of the A020-2 frame. This amendment reduces the frame applicability serial numbers from 0002-0400 to 0002-0399.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment narrows the pool of affected frames by changing the upper serial number from 0400 to 0399 (Background). The directive remains focused on inspection of welded areas of the A020-2 frame as required by Robinson Service Bulletin No. 47 (Requirement; Background)."},"complexity_factors":["Narrow technical scope limited to specific airframe part and serial numbers (Applicability)","Mandatory compliance references an external document (Robinson Service Bulletin No. 47) rather than reproducing inspection steps (Requirement)","Initial compliance timing (50 hours after 31 May 1986) plus ongoing inspections as defined in the Requirement Document introduces scheduling and recordkeeping obligations (Compliance)","Amendment changes serial-number range by one, requiring operators to check exact frame serials against the AD (Background)","Enforcement and detailed interpretation depend on regulator and manufacturer documents, creating multi-source compliance risk (Requirement; Background)"],"plain_english_summary":"This Airworthiness Directive mandates inspection of welded areas on A020-2 steel tube frames (serial numbers 0002–0399) in Robinson R22 helicopters, using Robinson Service Bulletin No. 47. Initial inspection must occur within 50 hours' time‑in‑service after 31 May 1986, with ongoing checks per the referenced document. It affects R22 owners/operators and maintenance providers; CASA enforces the rule and owners bear inspection and repair costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a minor amendment (Amendment 2) to an existing Airworthiness Directive. The only change from previous versions is narrowing the applicable frame serial numbers from 0002-0400 to 0002-0399 — a reduction of scope by exactly one unit. The core safety purpose (inspecting welded frame joints) remains unchanged since the original 1986 directive."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined applicability criteria (aircraft serial numbers and frame serial numbers)","Single requirement referencing an external technical document (Service Bulletin 47)","Simple compliance deadline (50 hours time in service after fixed date)","No nested exceptions, conditional logic, or cross-references to other legislation","Straightforward amendment history (only narrows serial number range by one unit)"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific maintenance actions on aircraft.\n\n**What it does:** It orders owners and operators of certain **Robinson R22 helicopters** to inspect the upper steel tube frames (a structural component) for cracks or defects in the welded joints.\n\n**Who it affects:** \n- **Helicopter models:** All Robinson R22 series helicopters\n- **Serial numbers:** Specifically those with serial numbers 0002 through 0311\n- **Frame serial numbers:** Only those with A020-2 steel tube frames numbered 0002 through 0399 (note: this amendment narrows the range from the previous 0002-0400)\n\n**What must be done:**\n- **Inspection:** A detailed check of all welded areas on the A020-2 frame, following the procedures in **Robinson Service Bulletin No. 47** (a technical instruction from the manufacturer)\n- **When:** Within 50 hours of flight time after 31 May 1986, and then ongoing as specified in the Service Bulletin\n\n**Why it matters:** Welded joints on helicopter frames can develop fatigue cracks over time. If undetected, these cracks could lead to structural failure in flight. This directive ensures critical safety inspections happen before a dangerous condition develops. The amendment slightly tightens which frames are covered (removing serial number 0400) based on updated safety data."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-12-amdt-2-upper-steel-tube-frames","history":"/api/acts/ad-r22-12-amdt-2-upper-steel-tube-frames/history","analysis":"/api/acts/ad-r22-12-amdt-2-upper-steel-tube-frames/analysis","conflicts":"/api/acts/ad-r22-12-amdt-2-upper-steel-tube-frames/conflicts","importantCases":"/api/acts/ad-r22-12-amdt-2-upper-steel-tube-frames/important-cases","documents":"/api/acts/ad-r22-12-amdt-2-upper-steel-tube-frames/documents"}}