{"id":"F2006B02785","name":"AD/B727/81 - Body Station 910 Floor Beam - Inspection","slug":"ad-b727-81-body-station-910-floor-beam-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42127,"registerId":"commonwealth-F2006B02785-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/81 - Body Station 910 Floor Beam - 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\nAD/B727/81 Body Station 910 Floor Beam - Inspection 9/77\n\nApplicability: All models.\n\n \n\nDocument: FAA AD 77-13-15 (39-2989). (Boeing SB 727-53-134 Rev. 3 refers). Compliance:  As detailed in the requirement document.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The supplied text provides no amendment or variation language and states applicability as “All models,” referencing FAA AD 77-13-15 and Boeing SB 727-53-134 Rev. 3 for technical detail. There is no indication in the provided material that the AD’s scope has been changed from its original intent; it functions as a short Australian adoption of the referenced FAA/Boeing requirement."},"complexity_factors":["Cross-reference to external technical documents (FAA AD 77-13-15 and Boeing SB 727-53-134 Rev. 3) rather than containing procedural detail itself (source: Document: FAA AD 77-13-15 ... Boeing SB 727-53-134 Rev. 3 refers; Compliance: As detailed in the requirement document).","Blanket applicability to “All models” of Boeing 727 increases the number of operators and aircraft affected (source: Applicability: All models.).","Technical nature of the mandated action (structural floor beam inspection) requires specialised maintenance skills and possibly non-routine repairs (implied by the title and type of document).","Delegation of task-definition to FAA/Boeing documents requires operators to obtain, interpret and implement external guidance, adding administrative overhead (source: Compliance: As detailed in the requirement document).","Regulatory placement in CASA’s schedule of airworthiness directives implies oversight/enforcement obligations that operators must meet, though enforcement detail is not supplied in the text.","Potential operational disruption (downtime, rescheduling) stemming from inspections and corrective work increases implementation complexity despite the short text of the AD."],"plain_english_summary":"This CASA airworthiness directive mandates inspection of the Body Station 910 floor beam on Boeing 727s (all models) but delegates all technical procedures, intervals and corrective actions to FAA AD 77-13-15 and Boeing Service Bulletin 727-53-134 Rev. 3. Operators must obtain and follow those documents, bearing the inspection and repair costs and any resulting downtime or maintenance scheduling impacts."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific structural inspection for a single aircraft type. It has not expanded beyond its original purpose of ensuring the airworthiness of Boeing 727 floor beams at Body Station 910."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — relies entirely on external referenced documents (FAA AD and Boeing Service Bulletin)","No conditional logic or nested exceptions within the text itself","Single, straightforward applicability clause ('All models')","Compliance requirement is delegated entirely to external documents ('As detailed in the requirement document')","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for **Boeing 727 aircraft**.\n\n**What it does:**\n- Requires inspection of the **floor beam at Body Station 910** — a specific structural component in the aircraft's fuselage (body).\n- The directive references an American Federal Aviation Administration (FAA) safety order (AD 77-13-15) and a Boeing service bulletin (727-53-134 Rev. 3) that details how to perform the inspection.\n\n**Who it affects:**\n- Owners and operators of **all Boeing 727 models** registered in Australia.\n\n**Why it matters:**\n- Airworthiness Directives are legally binding safety orders. They are issued when a safety problem is discovered that could affect flight safety. Compliance is mandatory — aircraft cannot legally fly unless the required inspection (and any necessary repairs) is completed according to the specified timeframe.\n- This particular directive addresses potential structural issues with a floor beam that could compromise the aircraft's integrity if left unchecked."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-81-body-station-910-floor-beam-inspection","history":"/api/acts/ad-b727-81-body-station-910-floor-beam-inspection/history","analysis":"/api/acts/ad-b727-81-body-station-910-floor-beam-inspection/analysis","conflicts":"/api/acts/ad-b727-81-body-station-910-floor-beam-inspection/conflicts","importantCases":"/api/acts/ad-b727-81-body-station-910-floor-beam-inspection/important-cases","documents":"/api/acts/ad-b727-81-body-station-910-floor-beam-inspection/documents"}}