{"id":"F2006B02664","name":"AD/B727/141 - Body Station 870 Terminal Fitting","slug":"ad-b727-141-body-station-870-terminal-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41980,"registerId":"commonwealth-F2006B02664-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/141 - Body Station 870 Terminal Fitting","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/B727/141 Body Station 870 Terminal Fitting 13/92\n\nApplicability: Model 727 series, line numbers 001 through 875.\n\n \n\nRequirement: Action IAW the technical requirements of FAA AD 91-24-11 Revision 1.\n\n \n\nNote: Boeing SB 727-53-0194 refers.\n\n \n\nCompliance: As specified in the Requirement Document with a revised effective date of 10 December 1992.\n\n \n\nBackground: The FAA had received reports of cracking and web separation of the BS 870 terminal fitting. This Directive requires an inspection for cracking and web separation of the terminal fitting, cold working certain fastener holes, and repair or replacement of the fitting, if necessary.\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":3,"scope_assessment":{"changed":false,"description":"The AD applies the FAA technical requirements (FAA AD 91-24-11 Revision 1) to Boeing 727 aircraft line numbers 001–875 and requires inspection, cold-working of fastener holes, and repair or replacement where necessary. The directive does not expand the set of affected parts or aircraft beyond those specified in the source text, nor does it add additional types of mandatory action beyond what the Requirement Document (the FAA AD) prescribes. (See: \"Applicability\"; \"Requirement\"; \"Background\"; \"Compliance\".)"},"complexity_factors":["Cross-reference to an external technical document (FAA AD 91-24-11 Revision 1) rather than containing full procedural detail in the AD itself (\"Requirement\").","Reference to a manufacturer service bulletin (Boeing SB 727-53-0194) for technical procedures (\"Note\").","Technical nature of required work (inspection for cracking, cold working fastener holes, structural repair or replacement) requires specialised maintenance skills and tooling (\"Background\").","Applicability limited to a defined subset of the fleet (line numbers 001–875), requiring operators to check serial/line numbers (\"Applicability\").","Compliance timing governed by an external Requirement Document and revised effective date (administrative coordination burden) (\"Compliance\")."],"plain_english_summary":"This AD mandates inspection—and, if needed, cold‑working, repair or replacement—of the BS 870 terminal fitting on Boeing 727s (line numbers 001–875), following FAA AD 91‑24‑11 Revision 1 and the referenced Boeing service bulletin. It affects aircraft owners/operators and maintenance providers because cracking/web separation was reported; compliance preserves structural integrity and imposes inspection, repair workload and related costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific structural defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating inspection and repair of the Body Station 870 terminal fitting."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined term implicitly referenced ('IAW' — In Accordance With, standard aviation shorthand)","No nested conditional logic or exceptions","Single cross-reference to external technical document (FAA AD 91-24-11 Revision 1) and one advisory note (Boeing SB 727-53-0194)","Clear, direct applicability statement (specific aircraft line numbers)","No internal definitions section or interpretation clauses"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority for **Boeing 727 aircraft**.\n\n**What it does:**\n- Requires owners and operators of Boeing 727 planes (specifically those built as line numbers 001 through 875) to inspect a specific structural part called the **\"Body Station 870 terminal fitting\"** — a metal bracket or connector in the aircraft's frame.\n- If inspectors find cracks or separation in this fitting, it must be repaired or replaced.\n- The directive also requires a process called **\"cold working\"** on certain fastener holes — a technique that strengthens metal by compressing it, reducing the risk of future cracking.\n\n**Who it affects:**\n- Airlines and operators flying Boeing 727 series aircraft in Australia.\n- Maintenance engineers responsible for keeping these planes airworthy.\n\n**Why it matters:**\nThe US Federal Aviation Administration (FAA) discovered this structural component was cracking and separating in some aircraft. Since this could compromise the plane's structural integrity and safety, Australia adopted the same safety requirement to ensure these aircraft remain safe to fly. The directive makes compliance with the US safety order (FAA AD 91-24-11 Revision 1) legally mandatory in Australia."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-141-body-station-870-terminal-fitting","history":"/api/acts/ad-b727-141-body-station-870-terminal-fitting/history","analysis":"/api/acts/ad-b727-141-body-station-870-terminal-fitting/analysis","conflicts":"/api/acts/ad-b727-141-body-station-870-terminal-fitting/conflicts","importantCases":"/api/acts/ad-b727-141-body-station-870-terminal-fitting/important-cases","documents":"/api/acts/ad-b727-141-body-station-870-terminal-fitting/documents"}}