{"id":"F2006B04416","name":"AD/BELL 206/102 Amdt 2 - Tail Rotor Yoke and Pitch Links","slug":"ad-bell-206-102-amdt-2-tail-rotor-yoke-and-pitch-links","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44241,"registerId":"commonwealth-F2006B04416-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/102 Amdt 2 - Tail Rotor Yoke and Pitch Links","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 206/102\n\nAmdt 2\n\n  \nTail Rotor Yoke and Pitch Links 5/87\n\nApplicability: All model Bell 206A, B, L and Agusta Bell AB206A, B, L helicopters equipped with tail rotor yoke P/N 206-011-819-101 and crosshead P/N 206-010-741-001/-003.\n\nRequirement: 1. Inspect in accordance with Bell Helicopter Alert Service Bulletin 206-86-31.\n\nNote: FAA AD 86-24-01 and Italian AD 87-2/AB206-118 also refer.\n\n2. Install crosshead P/N 206-011-857-001.\n\nCompliance: 1. Unless already accomplished, within 10 hours time in service after 7 May 1987.\n\n2. Unless already accomplished, if contact is evident replace crosshead before further flight. If no contact is evident install crosshead within 200 hours time in service or 90 days after 7 May 1987 which ever occurs first.\n\nBackground: The manufacturer has received reports of tail rotor pitch links contacting the tail rotor yoke, when applying full left pedal and full flap of the tail rotor hub and blade assembly. This Directive has been amended to include Agusta Bell helicopters.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This is Amendment 2 to the original AD/BELL 206/102. The original directive covered Bell Helicopter Textron Canada (BHTC) 206 series helicopters only. This amendment expanded the scope to include Agusta Bell 206 series helicopters (Italian-manufactured variants of the same design), as noted in the Background section: 'This Directive has been amended to include Agusta Bell helicopters.'"},"complexity_factors":["Single, specific mechanical issue addressed","Only 2 defined part numbers in applicability section","Two straightforward compliance paths based on inspection outcome","No nested exceptions or conditional logic beyond the binary 'contact evident/no contact' test","Clear deadline structure (10 hours / 200 hours or 90 days)","Short document with minimal cross-referencing (only references one Service Bulletin and two related foreign ADs in a note)","No interpretation section or defined terms"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and corrective action on the tail rotor system of Bell 206 and Agusta Bell AB206 (A, B, L) helicopters when specific yoke and crosshead part numbers are installed. It requires an immediate ASB inspection and replacement of the crosshead with an improved part if pitch links contact the yoke, or replacement within a short flight‑hour/time window otherwise.\n\nThe action prevents possible tail rotor damage and loss of control caused by pitch‑link/yoke interference."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The Directive was amended to add Agusta Bell AB206A, B, L helicopters to the applicability. The Background states: \"This Directive has been amended to include Agusta Bell helicopters.\""},"complexity_factors":["Narrow technical applicability limited to specific helicopter models and exact part numbers (Applicability).","Two-step mandate: required inspection per an external service bulletin and mandatory part installation (Requirement).","Tight, conditional compliance deadlines including immediate replacement if contact is found, otherwise staged time/period limits (Compliance).","Dependence on an external manufacturer document for inspection procedure (Bell Helicopter Alert Service Bulletin 206-86-31) increases operational coordination needs (Requirement).","Part-number specificity increases logistics and parts-procurement burden for operators and maintainers (Applicability; Requirement).","Reference to foreign airworthiness directives (FAA AD 86-24-01 and Italian AD 87-2/AB206-118) suggests cross-jurisdictional alignment but requires operators to track multiple sources (Requirement; Note)."],"plain_english_summary":"Mandates inspection and replacement of the tail-rotor crosshead on specified Bell 206 and Agusta Bell 206 helicopters fitted with tail rotor yoke P/N 206-011-819-101 and crosshead P/N 206-010-741-001/-003. Inspections must follow Bell Helicopter Alert Service Bulletin 206-86-31 and the replacement crosshead P/N 206-011-857-001 must be installed.\n\nCompliance windows are short (inspection within 10 hours; immediate replacement before further flight if contact; otherwise replacement within 200 hours or 90 days after 7 May 1987). The action responds to reports of pitch links contacting the tail rotor yoke under full left pedal and full flap."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-102-amdt-2-tail-rotor-yoke-and-pitch-links","history":"/api/acts/ad-bell-206-102-amdt-2-tail-rotor-yoke-and-pitch-links/history","analysis":"/api/acts/ad-bell-206-102-amdt-2-tail-rotor-yoke-and-pitch-links/analysis","conflicts":"/api/acts/ad-bell-206-102-amdt-2-tail-rotor-yoke-and-pitch-links/conflicts","importantCases":"/api/acts/ad-bell-206-102-amdt-2-tail-rotor-yoke-and-pitch-links/important-cases","documents":"/api/acts/ad-bell-206-102-amdt-2-tail-rotor-yoke-and-pitch-links/documents"}}