{"id":"F2006B02804","name":"AD/B737/100 - Aileron Control Cable Pulley Bracket","slug":"ad-b737-100-aileron-control-cable-pulley-bracket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42146,"registerId":"commonwealth-F2006B02804-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B737/100 - Aileron Control Cable Pulley Bracket","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)  \nBoeing 737 Series Aeroplanes\n\nAD/B737/100 Aileron Control Cable Pulley Bracket 5/97\n\nApplicability: Model 737-300 series aircraft, as listed in Boeing Service Bulletin 737-27-1154.\n\nRequirement: a. Perform a visual inspection to detect fatigue cracking, base trim, or upper flange over-trim of the pulley brackets, part number 65C25555-3, 65C5555-501, or 69- 73479-1, of the aileron control cables, in accordance with Boeing Service Bulletin 737-27-1154.\n\nb. If any cracking, base trim, or upper flange over-trim of the pulley brackets is detected, replace the pulley brackets with new pulley brackets, and replace the two existing button-head rivets with flush-head rivets; in accordance with Boeing Service Bulletin 737-27-1154.\n\nNote: FAA AD 97-03-14 Amdt 39-9919 refers.\n\nCompliance: Unless already accomplished, before 14 September 1998.\n\nThis Airworthiness Directive becomes effective on 24 April 1997.\n\nBackground: The FAA required actions specified in this Directive are in response to a review of the flight control systems on Model 737 series aircraft by the Critical Design Review team.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive (AD) with focused, narrow scope. It addresses a specific mechanical defect on a specific aircraft model series. There is no indication of scope creep; the document maintains its original purpose of mandating a safety inspection and repair for identified flight control components."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined part numbers to identify affected components","Single, clear compliance pathway: inspect, then replace if necessary","No nested exceptions or conditional logic beyond the standard 'if found, then replace'","Single cross-reference to FAA AD 97-03-14 and Boeing Service Bulletin 737-27-1154 for technical details","Plain language structure with clear applicability, requirement, and compliance sections"],"plain_english_summary":"The Civil Aviation Safety Authority requires operators of certain Boeing 737-300s (per Boeing SB 737-27-1154) to inspect specific pulley brackets (listed part numbers) that guide aileron cables for fatigue cracking and wear, and to replace damaged brackets and change two rivets if defects are found. The order, effective 24 April 1997 with inspections due by 14 September 1998, aims to prevent possible aileron control failure and loss of aircraft control."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD as published prescribes inspection and replacement for the listed pulley brackets on 737-300 aircraft per Boeing Service Bulletin 737-27-1154; the text shows no expansion or narrowing of scope beyond those requirements."},"complexity_factors":["Limited technical scope: single aircraft model series and specific pulley bracket part numbers","Normative reliance on an external Boeing Service Bulletin for inspection and repair procedures","Subjective element: visual inspection requires maintenance judgment to detect fatigue cracking, base trim, or over-trim","Repairs require component replacement and rivet type change (button-head to flush-head), needing appropriate tooling and parts","Safety-critical system (flight controls) increases scrutiny and potential operational disruption during compliance window","Cross-reference to FAA AD increases regulatory coordination requirements"],"plain_english_summary":"This directive requires operators of Boeing 737-300 series aeroplanes (per Boeing Service Bulletin 737‑27‑1154) to visually inspect specified aileron control cable pulley brackets for fatigue cracking or incorrect trimming, and to replace any defective brackets and two rivets with the specified parts. Operators/owners must complete the work by 14 September 1998. The directive follows an FAA-requested Critical Design Review; operators bear inspection and repair costs and must follow the Boeing service bulletin for procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-100-aileron-control-cable-pulley-bracket","history":"/api/acts/ad-b737-100-aileron-control-cable-pulley-bracket/history","analysis":"/api/acts/ad-b737-100-aileron-control-cable-pulley-bracket/analysis","conflicts":"/api/acts/ad-b737-100-aileron-control-cable-pulley-bracket/conflicts","importantCases":"/api/acts/ad-b737-100-aileron-control-cable-pulley-bracket/important-cases","documents":"/api/acts/ad-b737-100-aileron-control-cable-pulley-bracket/documents"}}