{"id":"F2006B10667","name":"AD/HU 369/107 - Collective Pitch Mixer Bellcrank","slug":"ad-hu-369-107-collective-pitch-mixer-bellcrank","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116598,"registerId":"commonwealth-F2006B10667-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/HU 369/107 Collective Pitch Mixer Bel","sectionType":"part","heading":"AD/HU 369/107 Collective Pitch Mixer Bellcrank 6/2001","content":"# AD/HU 369/107 Collective Pitch Mixer Bellcrank 6/2001\n\nDM\n\nApplicability: All Kawasaki Model 369HS and 369D helicopters with part number 369A7602-W501 magnesium collective pitch mixer bellcrank installed.\n\nRequirement: Perform a dye penetrant inspection of the magnesium collective Pitch mixer bellcrank in accordance with Kawasaki 369 Service Bulletin No. KSB-369-338 or KSB-369D- 224, as applicable.\n\nIf cracking is detected, before further flight, replace with a serviceable magnesium or aluminium bellcrank.\n\nInstallation of an aluminium collective pitch mixer bellcrank (part number 369N2664- 501) in place of the magnesium part constitutes terminating action for the inspection requirement of this Directive.\n\nNote: Japan JCAB AD TCD-5588-2001 refers.\n\nCompliance: Before further flight after 9 May 2001, and thereafter at intervals not to exceed 150 hours time in service, until installation of an aluminium collective pitch mixer bellcrank.\n\nThis Airworthiness Directive becomes effective on 9 May 2001.\n\nBackground: The JCAB requires inspection of magnesium collective pitch mixer bellcranks to prevent possible break-up during flight, and consequent loss of control.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 3 May 2001\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 9 May 2001.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains targeted to Kawasaki 369HS/369D helicopters with the specified magnesium bellcrank. The directive prescribes inspection, replacement if cracked, and permits a terminating action by fitting the specified aluminium part; it tracks the JCAB requirement and does not broaden applicability beyond the identified parts and models."},"complexity_factors":["Technical specificity: identifies exact helicopter models and part numbers (model/part linkage increases precision but requires parts knowledge).","Mandatory non‑destructive testing method (dye‑penetrant) and recurring interval (150 hours) create operational scheduling and skills requirements.","Immediate compliance before next flight after effective date raises urgency and potential grounding costs.","Terminating action option (fit aluminium P/N 369N2664‑501) creates a binary compliance pathway and procurement choice.","Dependence on external documents: Kawasaki Service Bulletins (KSB‑369‑338 / KSB‑369D‑224) and reference to Japan JCAB AD for inspection instructions.","Limited applicability (specific models + installed magnesium part) reduces scope but requires operators to verify part installations."],"plain_english_summary":"This directive requires operators of Kawasaki 369HS and 369D helicopters fitted with the magnesium collective pitch mixer bellcrank (P/N 369A7602‑W501) to carry out dye‑penetrant inspections before the next flight and every 150 flight hours until the part is replaced. If cracks are found the part must be replaced before further flight; installing the aluminium bellcrank (P/N 369N2664‑501) stops the inspection requirement. The stated aim is to prevent in‑flight break‑up and loss of control; operators bear inspection and replacement costs."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety defect in a specific aircraft part. The scope remains precisely limited to the identified unsafe condition in the magnesium collective pitch mixer bellcrank."},"complexity_factors":["Single, clearly defined applicability (two specific helicopter models, one specific part number)","Straightforward requirement: one inspection method with two alternative service bulletins referenced","Simple conditional logic: if cracked → replace; if aluminium installed → inspection requirement terminates","Clear compliance deadline and recurring interval (150 hours)","No nested definitions, no cross-references to other legislation, no exceptions to exceptions","Total length: approximately 250 words of substantive text"],"plain_english_summary":"This AD requires operators of Kawasaki Model 369HS and 369D helicopters with magnesium collective pitch mixer bellcrank P/N 369A7602‑W501 to perform dye‑penetrant inspections for cracking. The first inspection is before next flight after 9 May 2001, then every 150 flight hours; any crack found must be corrected by replacing the part with a serviceable bellcrank or the improved aluminium P/N 369N2664‑501. Installing the aluminium bellcrank eliminates the repetitive inspection requirement.\n\nThe action addresses failure risk that could cause loss of helicopter control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-107-collective-pitch-mixer-bellcrank","history":"/api/acts/ad-hu-369-107-collective-pitch-mixer-bellcrank/history","analysis":"/api/acts/ad-hu-369-107-collective-pitch-mixer-bellcrank/analysis","conflicts":"/api/acts/ad-hu-369-107-collective-pitch-mixer-bellcrank/conflicts","importantCases":"/api/acts/ad-hu-369-107-collective-pitch-mixer-bellcrank/important-cases","documents":"/api/acts/ad-hu-369-107-collective-pitch-mixer-bellcrank/documents"}}