{"id":"F2006B02786","name":"AD/B727/82 - Horizontal Stabiliser Jackscrew Gimbal Support Fitting Assembly - Inspection","slug":"ad-b727-82-horizontal-stabiliser-jackscrew-gimbal-support-fitting-assembly-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42128,"registerId":"commonwealth-F2006B02786-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/82 - Horizontal Stabiliser Jackscrew Gimbal Support Fitting Assembly - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 727 Series Aeroplanes\n\n \n\n# AD/B727/82 Horizontal Stabiliser Jackscrew Gimbal\n\nSupport Fitting Assembly - Inspection\n\nApplicability: All model 727-100 series with S/Nos. 001 to 889. Document:  1. FAA AD 78-11-07 Amdt. 39-3228; or\n\n2. Boeing SB No. 727-55-A73.\n\n# 8/78\n\n \n\nCompliance: Unless already accomplished, initially inspect within 1000 hours time in service after 29 June 1978 and thereafter at intervals as per requirement document, No. 1.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused specifically on one mechanical component on one aircraft type. It has not expanded beyond its original purpose of mandating inspections for the horizontal stabiliser jackscrew assembly."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (aircraft model and serial number range)","Single compliance requirement with clear deadline (1,000 hours after specified date)","No nested exceptions or conditional logic — straightforward mandatory inspection","References external technical documents rather than embedding complex technical specifications","No interpretation section or defined terms within the instrument itself"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders owners and operators of specific Boeing 727-100 series aircraft (serial numbers 001 to 889) to inspect a critical part called the **\"horizontal stabiliser jackscrew gimbal support fitting assembly.\"** This component helps control the aircraft's pitch (nose up/down movement).\n\n**Why it matters:**\nIf this fitting fails, the pilots could lose control of the aircraft's horizontal stabiliser — the wing at the tail that keeps the plane level. This creates a serious flight safety risk.\n\n**Who must comply:**\nAnyone operating the affected Boeing 727-100 models. They must:\n- Complete the first inspection within 1,000 flight hours after 29 June 1978\n- Continue inspections at intervals specified in the referenced FAA document (AD 78-11-07)\n\n**Key documents referenced:**\n- FAA Airworthiness Directive 78-11-07 (the US safety authority's original order)\n- Boeing Service Bulletin 727-55-A73 (the manufacturer's repair instructions)\n\nThis directive essentially adopts a US safety requirement into Australian law to ensure the same aircraft operating in Australia meet identical safety standards."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD, as written, imposes inspection obligations on a defined group of Boeing 727-100 aircraft and delegates technical detail and recurring intervals to the referenced FAA AD or Boeing service bulletin. The text does not indicate any expansion or contraction of scope beyond those stated applicability and compliance requirements; it prescribes inspections rather than altering aircraft certification, operational permissions, or other regulatory categories."},"complexity_factors":["Cross-reference to external technical documents (FAA AD and Boeing Service Bulletin) for procedures and recurring intervals, which requires operators to obtain and apply separate materials (Document).","A concrete initial timing rule (1,000 hours after a fixed date) combined with externally-determined recurring intervals increases administrative scheduling complexity (Compliance).","Technical nature of the inspection requires qualified maintenance personnel and possible parts/repairs, adding operational and cost complexity not detailed in the AD text.","Record-keeping and enforcement: operators must track hours-in-service and document compliance, creating ongoing administrative burden.","Narrow applicability (specific model and serial number range) requires accurate fleet identification by operators and regulators (Applicability)."],"plain_english_summary":"This AD mandates inspections of the horizontal stabiliser jackscrew gimbal support fitting on Boeing 727‑100 aircraft S/N 001–889, with an initial inspection within 1,000 hours TIS after 29 June 1978 and recurring inspections per the referenced FAA AD 78‑11‑07 or Boeing SB No. 727‑55‑A73.  \n\nIt affects aircraft owners/operators and their maintenance organisations (operators bear inspection/repair costs) and delegates technical procedures and intervals to the cited FAA/Boeing documents while CASA enforces the legal obligation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-82-horizontal-stabiliser-jackscrew-gimbal-support-fitting-assembly-inspection","history":"/api/acts/ad-b727-82-horizontal-stabiliser-jackscrew-gimbal-support-fitting-assembly-inspection/history","analysis":"/api/acts/ad-b727-82-horizontal-stabiliser-jackscrew-gimbal-support-fitting-assembly-inspection/analysis","conflicts":"/api/acts/ad-b727-82-horizontal-stabiliser-jackscrew-gimbal-support-fitting-assembly-inspection/conflicts","importantCases":"/api/acts/ad-b727-82-horizontal-stabiliser-jackscrew-gimbal-support-fitting-assembly-inspection/important-cases","documents":"/api/acts/ad-b727-82-horizontal-stabiliser-jackscrew-gimbal-support-fitting-assembly-inspection/documents"}}