{"id":"F2006B06934","name":"AD/SEATS/6 - Aviatech Flight Crew Seats","slug":"ad-seats-6-aviatech-flight-crew-seats","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114823,"registerId":"commonwealth-F2006B06934-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SEATS/6 - Aviatech Flight Crew Seats","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nSeats and Berths\n\nAD/SEATS/6 Aviatech Flight Crew Seats 7/91\n\nApplicability: Aviatech Inc. pilot & co-pilot seats Model 394, P/N's 394-(000)-01, \\-02, \\-03, \\-04, \\-05\n\nand \\-06, and 394-(001)-01, \\-02, \\-03, \\-04, \\-05 and \\-06, approved by Transport Canada under TSO Design Approval C39A used on de Havilland DHC-8 aircraft.\n\nRequirement: Action in accordance with the Requirements of Transport Canada AD CF-91-04.\n\nNote: Aviatech SB 2 Rev A refers.\n\nCompliance: Prior to 1 September 1991.\n\nBackground: There have been cases of excessive wear and fraying of the pilot and co-pilot shoulder harness caused by rubbing of the shoulder harness on the guides located on top of the seat-back. Compliance date required by Transport Canada is extended by one month due to receipt date of Canadian Directive.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-limited safety directive addressing a specific mechanical defect. It has not expanded beyond its original purpose of mandating repairs to specific seat models."},"complexity_factors":["Single, specific mechanical issue (shoulder harness wear)","Clear applicability criteria (specific manufacturer, model, part numbers, aircraft type)","Single compliance action (follow Canadian AD)","One defined compliance date with simple extension rationale","No nested exceptions or conditional logic","Cross-reference to only one external document (Transport Canada AD CF-91-04)","Total length: approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft.\n\n**What it does:**\nOrders owners and operators of specific Aviatech flight crew seats (used in de Havilland DHC-8 aircraft) to fix a safety problem. The shoulder harnesses on these seats are wearing out and fraying because they rub against guides on the seat-back. This could compromise pilot safety during turbulence or emergencies.\n\n**Who must act:**\nAnyone operating aircraft with Aviatech Model 394 pilot or co-pilot seats (specific part numbers listed) that were approved by Transport Canada and installed on DHC-8 aircraft.\n\n**What they must do:**\nFollow the repair instructions in Transport Canada Airworthiness Directive CF-91-04. There's also a service bulletin (Aviatech SB 2 Rev A) that provides guidance.\n\n**When:**\nThe work must be completed before 1 September 1991.\n\n**Why it matters:**\nWorn shoulder harnesses could fail when pilots need them most — during rough air or a crash. This directive ensures the fix happens before the harnesses become dangerous. The Australian deadline is one month later than Canada's because the directive took time to reach Australian authorities."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument applies to the specified Aviatech Model 394 seats and requires compliance with the Transport Canada AD; the text does not indicate any expansion or narrowing of that scope from the original intent. It notes a one-month extension of the compliance date driven by late receipt of the Canadian directive (Background; Compliance)."},"complexity_factors":["Narrow applicability limited to specific seat model (Aviatech Model 394) and enumerated part numbers (Applicability)","Incorporation by reference to an external regulator’s AD (Transport Canada AD CF-91-04) for technical requirements (Requirement)","Reference to manufacturer service bulletin (Aviatech SB 2 Rev A) without reproducing technical steps (Note)","Fixed, near-term compliance date (Compliance) with a one-month extension noted due to late receipt (Background)","Brevity of the instrument leaves operational detail (costs, enforcement, alternative methods) to other documents or regulators"],"plain_english_summary":"Operators of de Havilland DHC‑8 aircraft fitted with specified Aviatech Model 394 pilot/co‑pilot seats must carry out the remedial inspections/repairs mandated by Transport Canada AD CF‑91‑04, using Aviatech SB 2 Rev A, to address reported shoulder‑harness wear. Compliance is required before 1 September 1991. The rule narrowly affects aircraft with the listed part numbers, leaves technical steps and costs to the referenced AD/bulletin, and places responsibility on operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-seats-6-aviatech-flight-crew-seats","history":"/api/acts/ad-seats-6-aviatech-flight-crew-seats/history","analysis":"/api/acts/ad-seats-6-aviatech-flight-crew-seats/analysis","conflicts":"/api/acts/ad-seats-6-aviatech-flight-crew-seats/conflicts","importantCases":"/api/acts/ad-seats-6-aviatech-flight-crew-seats/important-cases","documents":"/api/acts/ad-seats-6-aviatech-flight-crew-seats/documents"}}