{"id":"F2006B04421","name":"AD/BELL 206/108 - Stabilizer Identification","slug":"ad-bell-206-108-stabilizer-identification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44246,"registerId":"commonwealth-F2006B04421-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/108 - Stabilizer Identification","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\nAD/BELL 206/108 Stabilizer Identification 10/87 DM\n\nApplicability: All model 206L-1 and 206L-3 with stabilizer assembly P/No. 206-023-119-151 installed.\n\nRequirement: Inspect the stabilizer assembly P/No. 206-023-119-151 and determine if one of the following S/Nos. is installed: AO-02065, AO-02069, AO-02075, AO-02080,\n\nAO-02084, AO-02095, AO-02097, AO-02126, AO-02132, AO-02136, AO-02144, AO-02149, AO-02150, AO-02166 and AO-10644.\n\nCompliance: Inspect prior to 19 August 1987 \\- if found installed replace before further flight.\n\nBackground: The manufacturer reports that a number of stabilizers were rejected during the manufacturing process for bonding discrepancies. After mechanical deformation they were sold as scrap material. The manufacturer reports that at least one stabilizer was repaired by an unknown agent using an unapproved method, given an airworthy appearance and installed on an operating helicopter. It is probable that other or all of the rejected parts have been distributed as serviceable spares.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive targeting a specific manufacturing defect. It has not expanded beyond its original purpose of identifying and removing potentially dangerous stabilizers from service."},"complexity_factors":["Single, specific applicability criterion (two helicopter models with one part number)","Straightforward requirement: visual inspection for 15 specific serial numbers","Binary compliance outcome: if found, replace; if not found, no action required","No defined terms section, no cross-references to other legislation","Single deadline with no conditional extensions or exceptions","Background narrative provided in plain language rather than technical legalese"],"plain_english_summary":"This AD orders owners/operators of Bell 206L-1 and 206L-3 helicopters to inspect the tail stabilizer for certain serial numbers and, if any are found, replace the stabilizer before next flight. It responds to discovery of improperly bonded stabilizers—one illegally repaired and returned to service—raising risk of in‑flight failure and loss of control. Affects operators, maintenance personnel, and safety inspectors."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope aligns with its stated aim of identifying and removing potentially improperly repaired stabilizers. The instrument targets specific parts/serial numbers for inspection and removal; no expansion or narrowing of that original remedial scope is indicated in the text."},"complexity_factors":["Narrow applicability: specific helicopter models and a single part number reduce scope.","Discrete identification task: requirement is to inspect serial numbers against a finite list.","Clear corrective action: replacement before further flight if a listed serial number is found.","Fixed compliance timeline (dated) simplifies enforcement but makes the AD time‑sensitive.","Operational burden lies with operators/maintenance providers who must source replacement parts.","Limited regulatory ambiguity — no discretionary standards or alternative compliance pathways provided."],"plain_english_summary":"This airworthiness directive requires owners/operators of Bell 206L-1 and 206L-3 helicopters fitted with stabilizer assembly P/No. 206-023-119-151 to inspect the stabilizer’s serial number and, if it matches any on a listed set, replace it before further flight (inspection deadline: 19 August 1987). It affects operators and maintenance providers who must pay for inspection and replacement; the operator or mechanic decides if a part is affected and must remove and replace suspect stabilizers to maintain airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-108-stabilizer-identification","history":"/api/acts/ad-bell-206-108-stabilizer-identification/history","analysis":"/api/acts/ad-bell-206-108-stabilizer-identification/analysis","conflicts":"/api/acts/ad-bell-206-108-stabilizer-identification/conflicts","importantCases":"/api/acts/ad-bell-206-108-stabilizer-identification/important-cases","documents":"/api/acts/ad-bell-206-108-stabilizer-identification/documents"}}