{"id":"F2006B09550","name":"AD/EMY/30 - Dunlop-Beaufort Mk 28 Lifejacket","slug":"ad-emy-30-dunlop-beaufort-mk-28-lifejacket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54184,"registerId":"commonwealth-F2006B09550-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMY/30 - Dunlop-Beaufort Mk 28 Lifejacket","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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Emergency Equipment\n\n \n\nAD/EMY/30 Dunlop-Beaufort Mk 28 Lifejacket 9/93\n\nApplicability: All lifejackets if used in conjunction with an immersion suit. Requirement: Action in accordance with Dunlop-Beaufort Service Bulletin No 131. Compliance:               Prior to 19 May 1994.\n\nNote: CAA (UK) AD 008-04-93 refers.\n\n \n\nBackground:  The Service Bulletin introduces a modification to increase the nominal buoyancy of the lifejacket to ensure immersion suit compatibility.\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, targeted safety directive addressing a specific technical compatibility issue between two pieces of aviation safety equipment. It has not expanded beyond its original purpose of ensuring the Dunlop-Beaufort Mk 28 Lifejacket functions correctly with immersion suits."},"complexity_factors":["Extremely short document (under 200 words)","Only one defined applicability condition ('used in conjunction with an immersion suit')","Single compliance action referencing an external technical document (Service Bulletin No. 131)","No nested exceptions, conditional logic, or cross-references to other legislation sections","Clear, fixed deadline with no alternative compliance methods or phased implementation","Minimal regulatory language — essentially a 'do this by then' instruction"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to a specific piece of emergency equipment: the **Dunlop-Beaufort Mk 28 Lifejacket**.\n\n**What it does:**\n- **Who's affected:** Anyone using this particular lifejacket model **together with an immersion suit** (a waterproof suit worn to protect against cold water).\n- **What must happen:** Operators must follow the instructions in **Dunlop-Beaufort Service Bulletin No. 131** — a technical notice from the manufacturer.\n- **The fix:** The lifejacket needs a modification to **increase its buoyancy** (floating power) so it works properly when worn over an immersion suit. Without this change, the lifejacket might not keep someone afloat adequately because the suit adds bulk and weight.\n- **Deadline:** The modification had to be completed **before 19 May 1994**.\n\n**Why it matters:**\nIf a pilot or crew member ditched in water wearing both the lifejacket and immersion suit, inadequate buoyancy could mean the difference between survival and drowning. This directive closes that safety gap by ensuring the equipment performs as intended in real emergency conditions.\n\n**Note:** The document references a UK aviation authority directive (CAA AD 008-04-93), showing this was an internationally coordinated safety action."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument sets a specific technical modification for a defined subset of equipment and a fixed compliance date (Applicability; Requirement; Compliance). There is no indication in the text that the scope has been broadened or narrowed from an earlier stated intent; the Background and Note merely explain the stated purpose and reference a related UK AD."},"complexity_factors":["Narrow technical scope limited to Dunlop-Beaufort Mk 28 lifejackets used with immersion suits (Applicability).","Single mandatory corrective action referenced externally (Service Bulletin No 131) rather than multiple in-text procedures (Requirement).","Single, fixed compliance deadline (Compliance).","Dependence on manufacturer documentation creates a practical step (obtaining and following SB 131) but not legal ambiguity.","No layered exemptions, multiple actors, or ongoing reporting obligations in the text."],"plain_english_summary":"The instrument requires owners/operators to modify Dunlop‑Beaufort Mk 28 lifejackets used with immersion suits as specified in Dunlop‑Beaufort Service Bulletin No. 131, completed by 19 May 1994, to increase nominal buoyancy for immersion‑suit compatibility. Costs, parts and work are the responsibility of the owner/operator; the rule is narrowly targeted so operators may instead avoid using affected Mk 28s with immersion suits."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emy-30-dunlop-beaufort-mk-28-lifejacket","history":"/api/acts/ad-emy-30-dunlop-beaufort-mk-28-lifejacket/history","analysis":"/api/acts/ad-emy-30-dunlop-beaufort-mk-28-lifejacket/analysis","conflicts":"/api/acts/ad-emy-30-dunlop-beaufort-mk-28-lifejacket/conflicts","importantCases":"/api/acts/ad-emy-30-dunlop-beaufort-mk-28-lifejacket/important-cases","documents":"/api/acts/ad-emy-30-dunlop-beaufort-mk-28-lifejacket/documents"}}