{"id":"F2006B10634","name":"AD/HU 269/74 - Belt Drive Pulley H-Frame Tie Bar Bracket - Inspection","slug":"ad-hu-269-74-belt-drive-pulley-h-frame-tie-bar-bracket-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116532,"registerId":"commonwealth-F2006B10634-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/74 - Belt Drive Pulley H-Frame Tie Bar Bracket - Inspection","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nSchweizer (Hughes) 269 Series Helicopters\n\nAD/HU 269/74 Belt Drive Pulley H-Frame Tie Bar Bracket - Inspection\n\n  \n3/83\n\nApplicability: All model 269A, 269A-1, 269B and 269C helicopters fitted with Part No. 269A5593- 3, 269A5573-11 OR 269A5573-903 “H” frame assemblies incorporating a P/No.\n\n269A5517-7 aluminium tie bar bracket.\n\nDocument: Hughes Service Information N-184.\n\nCompliance: Daily inspection until fitment of P/No. 269A5517-13 steel tie bar bracket in accordance with Part 2 of the requirement document.\n\nNote: For aircraft maintained in accordance with ANO 100.5.1 this Directive shall be entered on the maintenance release as maintenance required. The inspection may be performed by the pilot in command, in which case certification is not required. In all other cases certification may be made on the maintenance release. This inspection may also be performed and certified by any Licensed Aircraft Maintenance Engineer.\n\nBackground: The manufacturer advises that there have been numerous reports of cracked aluminium tie bar brackets and that a daily inspection is required until fitment of the recommended steel bracket assembly.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2530},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope focused solely on inspection and replacement of a specific defective helicopter part. No expansion beyond the original safety purpose is evident."},"complexity_factors":["Specific applicability limited by aircraft model and 4 specific part numbers","Single compliance pathway with clear termination condition (part replacement)","Cross-reference to external technical document (Hughes Service Information N-184) for replacement procedure","Minimal conditional logic (only differentiation between maintenance regimes for who can certify)"],"plain_english_summary":"This AD mandates daily inspections for cracking of a specific aluminium tie‑bar bracket on certain Schweizer (Hughes) 269A/A‑1/B/C helicopters with listed H‑frame assemblies, and requires replacement with a steel bracket per the manufacturer’s service info. It affects owners and operators of those helicopters to prevent bracket failure that could damage the belt drive or cause loss of control.\n\nLicensed AMEs may certify the inspection; pilots may perform checks only under the referenced maintenance rule, with results recorded."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-74-belt-drive-pulley-h-frame-tie-bar-bracket-inspection","history":"/api/acts/ad-hu-269-74-belt-drive-pulley-h-frame-tie-bar-bracket-inspection/history","analysis":"/api/acts/ad-hu-269-74-belt-drive-pulley-h-frame-tie-bar-bracket-inspection/analysis","conflicts":"/api/acts/ad-hu-269-74-belt-drive-pulley-h-frame-tie-bar-bracket-inspection/conflicts","importantCases":"/api/acts/ad-hu-269-74-belt-drive-pulley-h-frame-tie-bar-bracket-inspection/important-cases","documents":"/api/acts/ad-hu-269-74-belt-drive-pulley-h-frame-tie-bar-bracket-inspection/documents"}}