{"id":"F2006B03424","name":"AD/B767/7 - Passenger/Crew Door Latch Overcentre Mechanism","slug":"ad-b767-7-passenger-crew-door-latch-overcentre-mechanism","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42965,"registerId":"commonwealth-F2006B03424-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/7 - Passenger/Crew Door Latch Overcentre Mechanism","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 767 Series Aeroplanes\n\n \n\nAD/B767/7 Passenger/Crew Door Latch Overcentre Mechanism 4/86\n\nDM\n\n \n\nApplicability: All model 767 with line position 2 to 121 and 124 to 127. Requirement:  Action in accordance with Boeing SB 767-52-0041.\n\nNote: FAA AD 86-02-01 refers.\n\n \n\nCompliance: Prior to 31 March 1986.\n\n \n\nBackground: Boeing Co have reported that a significant percentage of self locking nuts P/N BACN10JC6CM in stock do not meet specified locking torque requirements.\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, time-bound safety directive addressing a specific mechanical defect. It has not expanded beyond its original purpose of mandating a particular door latch inspection/repair."},"complexity_factors":["Extremely short document (under 200 words)","Only 1 defined term implicitly referenced (the Boeing SB number)","No cross-references to other legislation beyond a note about the corresponding FAA directive","Single, unambiguous compliance requirement with no exceptions or conditional logic","Clear applicability criteria (specific line numbers) with no nested conditions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially 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 767 aeroplanes to inspect and fix a problem with the passenger and crew door latches. The issue involves faulty self-locking nuts (part number BACN10JC6CM) that don't grip tightly enough, which could potentially cause door mechanism failures.\n\n**Who it affects:**\n- Owners and operators of Boeing 767 aircraft with specific manufacturing line numbers (2–121 and 124–127)\n- Maintenance organisations servicing these aircraft\n\n**What must be done:**\nFollow the instructions in **Boeing Service Bulletin 767-52-0041** — a technical repair notice from the manufacturer detailing exactly how to inspect and replace the faulty nuts.\n\n**Why it matters:**\nDoor latches that don't lock properly create serious safety risks. If a door isn't secured correctly, it could fail during flight (depressurisation risk) or on the ground (passenger/crew injury). This directive forces a fix before a specific deadline to prevent accidents.\n\n**Key deadline:**\nAll affected aircraft had to comply before 31 March 1986."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive implements a targeted corrective action for a reported deficiency in a specific part (self‑locking nut P/N BACN10JC6CM) on identified Boeing 767 line positions by mandating the actions in Boeing SB 767-52-0041 with a set compliance date. Nothing in the text indicates a change from the instrument's original corrective intent or an expansion/reduction of scope beyond the stated applicability, requirement and compliance date (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability: specific model and line positions listed (Applicability)","Single mandatory action but no technical steps in the AD itself — it references an external Boeing service bulletin for details (Requirement)","Fixed compliance deadline creates scheduling pressure (Compliance)","Dependence on obtaining and following a manufacturer service bulletin increases administrative and logistical effort (Requirement)","Reference to a specific part number with documented defect increases urgency but limits scope of required inspections/replacements (Background)"],"plain_english_summary":"This airworthiness directive requires operators of specified Boeing 767s (line positions 2–121 and 124–127) to carry out Boeing Service Bulletin SB 767‑52‑0041 to inspect and restore or replace certain self‑locking nuts after reports they failed to meet locking‑torque specs. Compliance is mandatory by 31 March 1986, with operators bearing costs and downtime. CASA issued the AD and points to the Boeing SB (and FAA AD 86‑02‑01) as the required method of compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-7-passenger-crew-door-latch-overcentre-mechanism","history":"/api/acts/ad-b767-7-passenger-crew-door-latch-overcentre-mechanism/history","analysis":"/api/acts/ad-b767-7-passenger-crew-door-latch-overcentre-mechanism/analysis","conflicts":"/api/acts/ad-b767-7-passenger-crew-door-latch-overcentre-mechanism/conflicts","importantCases":"/api/acts/ad-b767-7-passenger-crew-door-latch-overcentre-mechanism/important-cases","documents":"/api/acts/ad-b767-7-passenger-crew-door-latch-overcentre-mechanism/documents"}}