{"id":"F2006B02778","name":"AD/B727/75 Amdt 2 - Forward and Aft Cargo Door Stops - Inspection and Modification","slug":"ad-b727-75-amdt-2-forward-and-aft-cargo-door-stops-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42120,"registerId":"commonwealth-F2006B02778-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/75 Amdt 2 - Forward and Aft Cargo Door Stops - Inspection and Modification","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/B727/75\n\nAmdt 2\n\nApplicability: All models.\n\n\nForward and Aft Cargo Door Stops - Inspection and Modification\n\n\n3/78\n\n \n\nDocument: Boeing SB No. 727-52-A102, Rev. 3.\n\n \n\nCompliance: Unless already accomplished, initially inspect as per requirement document and thereafter at intervals not exceeding 1650 flights until modified.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 2 to an existing Airworthiness Directive, but the scope remains tightly focused on the original safety issue: cargo door stops on Boeing 727 aircraft. The amendment does not appear to expand applicability to other aircraft types or systems."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined reference (Boeing SB No. 727-52-A102, Rev. 3)","Simple conditional structure: inspect until modified","Single compliance pathway with clear interval (1650 flights)","No nested exceptions or cross-references to other legislation","Straightforward applicability (all models of one aircraft type)"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to **all Boeing 727 aircraft**.\n\n**What it requires:**\n- **Inspection:** Operators must check the forward and aft cargo door stops (mechanical components that prevent cargo doors from opening in flight) according to Boeing Service Bulletin 727-52-A102, Revision 3.\n- **Frequency:** First inspection must be done by the deadline (March 1978), then repeated every **1,650 flights** until a permanent modification is installed.\n- **Modification:** The repeated inspections stop once the aircraft is modified with a permanent fix.\n\n**Who it affects:** Airlines and operators flying Boeing 727s in Australia.\n\n**Why it matters:** Faulty cargo door stops could allow doors to open during flight, potentially causing rapid decompression or loss of cargo — a serious safety risk. This directive ensures the problem is found and fixed before it causes an accident."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is presented as Amendment 2 (\"Amdt 2\") to AD/B727/75, which indicates it modifies a prior airworthiness directive. The supplied text, however, contains only the amended requirement (inspection per Boeing SB No. 727-52-A102, Rev. 3, and repeated inspections at intervals not exceeding 1650 flights until modification) and does not include the original AD text, so the exact nature and extent of the change relative to the original directive cannot be determined from this extract alone."},"complexity_factors":["Cross-reference to an external technical document (Boeing SB No. 727-52-A102, Rev. 3) increases compliance complexity because the directive does not reproduce procedural detail (see \"Document: Boeing SB No. 727-52-A102, Rev. 3.\").","Recurring compliance measured in flight count (intervals not exceeding 1650 flights) requires ongoing flight tracking and record-keeping (see \"... thereafter at intervals not exceeding 1650 flights\").","Applicability to all models broadens administrative and cost impact across all operators of the type (see \"Applicability: All models.\").","Labelled as an amendment (\"Amdt 2\"), indicating the directive sits in a sequence of regulatory changes and may require checking prior versions for context."],"plain_english_summary":"This directive requires operators of all Boeing 727 models to perform an initial inspection of the forward and aft cargo door stops per Boeing SB No. 727-52-A102 Rev. 3 and repeat that inspection at intervals not exceeding 1,650 flights until the SB-mandated modification is done.  \n\nOperators must obtain and follow the service bulletin, bear inspection/modification costs, track flight counts for scheduling, and can eliminate recurring inspections by completing the modification."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-75-amdt-2-forward-and-aft-cargo-door-stops-inspection-and-modification","history":"/api/acts/ad-b727-75-amdt-2-forward-and-aft-cargo-door-stops-inspection-and-modification/history","analysis":"/api/acts/ad-b727-75-amdt-2-forward-and-aft-cargo-door-stops-inspection-and-modification/analysis","conflicts":"/api/acts/ad-b727-75-amdt-2-forward-and-aft-cargo-door-stops-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-b727-75-amdt-2-forward-and-aft-cargo-door-stops-inspection-and-modification/important-cases","documents":"/api/acts/ad-b727-75-amdt-2-forward-and-aft-cargo-door-stops-inspection-and-modification/documents"}}