{"id":"F2005L03912","name":"AD/BELL 206/160 Amdt 1 - High Forward and High Aft Crosstubes","slug":"ad-bell-206-160-amdt-1-high-forward-and-high-aft-crosstubes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39715,"registerId":"commonwealth-F2005L03912-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron Canada (BHTC) 20","sectionType":"division","heading":"Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters","content":"### Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n| AD/BELL 206/160 Amdt 1 | High Forward and High Aft Crosstubes | 1/2006 |\n| ---------------------- | ------------------------------------ | ------ |\n\n| Applicability: | Model 206A and 206B helicopters modified by Aeronautical Accessories, Inc. Supplemental Type Certificate SH1392SO, with high forward crosstube, part number 206-321-001 with serial number 1001 through 1152, and high aft crosstube, part number 206-321-002 with serial number 2001 through 2152, installed. |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Remove each affected crosstube and inspect for cracks in accordance with Aeronautical Accessories, Inc. Alert Service Bulletin No. AA-03121, dated25 October 2004.Replace any cracked crosstube with a serviceable crosstube before further flight.Note: FAA AD 2005-16-04 Amdt 39-14209 refers.               |\n| Compliance:    | Within 300 hours time in service or 60 days after 27 October 2005, whichever occurs first. Inspect thereafter at intervals not to exceed 300 hours time in service or 12 months, whichever occurs first.The initial compliance time remains unchanged by this issue.                                           |\n|                | This Amendment becomes effective on 19 January 2006.                                                                                                                                                                                                                                                           |\n| Background:    | The FAA received a report of a cracked high forward crosstube.Amendment 1 is issued to correct the repeat inspection interval calendar compliance time.                                                                                                                                                        |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n1 December 2005","sortOrder":0},{"sectionNumber":"AD/BELL 206/160 Amdt 1","sectionType":"part","heading":"AD/BELL 206/160 Amdt 1","content":"## AD/BELL 206/160 Amdt 1","sortOrder":1},{"sectionNumber":"High Forward and High Aft Crosstubes","sectionType":"part","heading":"High Forward and High Aft Crosstubes","content":"## High Forward and High Aft Crosstubes","sortOrder":2},{"sectionNumber":"1/2006","sectionType":"part","heading":"1/2006","content":"## 1/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical safety directive targeting a specific mechanical defect in specific helicopter models. Amendment 1 makes a minor technical correction to inspection intervals without expanding the scope beyond the original safety purpose."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 defined part numbers and 2 serial number ranges to identify applicability","Single primary requirement with clear compliance timeline","No nested exceptions or conditional logic","Straightforward cross-reference to FAA AD and manufacturer service bulletin for technical details rather than reproducing them","Minimal legislative machinery — operates as a direct regulatory instrument rather than amending an Act"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific Bell 206 helicopters that have been modified with particular high forward and high aft crosstubes (structural components that help support the helicopter's landing gear or airframe).\n\n**What it requires:**\n- Owners and operators must **remove and inspect these crosstubes for cracks** following a specific manufacturer's service bulletin\n- Any cracked crosstube must be **replaced with a serviceable part** before the helicopter can fly again\n- **Initial inspection:** Must be done within 300 flight hours or 60 days after 27 October 2005 (whichever comes first)\n- **Ongoing inspections:** Must be repeated every 300 flight hours or 12 months (whichever comes first)\n\n**Why it matters:**\nThe US Federal Aviation Administration (FAA) reported a cracked high forward crosstube, which could lead to structural failure. This directive prevents accidents by forcing operators to check for this specific defect. This amendment (Amendment 1) fixes a technical error in the original directive regarding how often calendar-based inspections must occur.\n\n**Who is affected:**\nOperators of Bell 206A and 206B helicopters modified by Aeronautical Accessories, Inc. under a specific design approval (Supplemental Type Certificate SH1392SO), with crosstubes in specific serial number ranges."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment does not broaden the AD's subject-matter or add new affected components. It only corrects the calendar (time-based) element of the repeat inspection interval so the recurring inspection window is correctly specified (the AD continues to require removal and inspection of the same crosstube serial ranges and the same replacement action for cracked parts). The change is a timing/clarification amendment, not an expansion beyond the original safety purpose (addressing cracked crosstubes)."},"complexity_factors":["Limited length and focused subject matter (single component: high forward/high aft crosstubes).","Applicability limited by model, modification (STC SH1392SO), two part numbers and two serial-number ranges (adds specificity).","Cross-references to external documents: Aeronautical Accessories Alert Service Bulletin No. AA-03121 (25 Oct 2004) and FAA AD 2005-16-04 (increases procedural dependency).","Dual-condition compliance timing for initial action (300 hours OR 60 days) and for recurrent inspections (300 hours OR 12 months) — introduces simple conditional logic.","Amendment changes a calendar element of the repeat-interval requirement (minor but important clarification)."],"plain_english_summary":"This AD mandates removal and inspection of specified Aeronautical Accessories high forward/aft crosstubes on Bell 206A/206B helicopters modified under STC SH1392SO, with cracked crosstubes replaced before flight. Inspections start within the stated short-term window and recur at fixed hours/annual intervals. It affects owners, operators and maintenance organisations and aims to detect and remove cracks to prevent structural failure."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-160-amdt-1-high-forward-and-high-aft-crosstubes","history":"/api/acts/ad-bell-206-160-amdt-1-high-forward-and-high-aft-crosstubes/history","analysis":"/api/acts/ad-bell-206-160-amdt-1-high-forward-and-high-aft-crosstubes/analysis","conflicts":"/api/acts/ad-bell-206-160-amdt-1-high-forward-and-high-aft-crosstubes/conflicts","importantCases":"/api/acts/ad-bell-206-160-amdt-1-high-forward-and-high-aft-crosstubes/important-cases","documents":"/api/acts/ad-bell-206-160-amdt-1-high-forward-and-high-aft-crosstubes/documents"}}