{"id":"F2006B06927","name":"AD/SEATS/21 - B/E Aerospace Seat - Hydrolock Pin Orientation","slug":"ad-seats-21-b-e-aerospace-seat-hydrolock-pin-orientation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114810,"registerId":"commonwealth-F2006B06927-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nSeats and Berths","sortOrder":0},{"sectionNumber":"AD/SEATS/21 B/E Aerospace Seat - Hydrolo","sectionType":"part","heading":"AD/SEATS/21 B/E Aerospace Seat - Hydrolock Pin Orientation 3/2002","content":"# AD/SEATS/21 B/E Aerospace Seat \\- Hydrolock Pin Orientation 3/2002\n\nApplicability: All B/E Aerospace Skyluxe II (AA2) passenger seats.\n\nNote: The applicable seats are known to be installed in but not limited to Airbus A300, A300-600, A320, A321, A330 and A340 Series aircraft; Boeing 737-800, 747- 200, 747-300, 747-400, 767-200 and 767-300 Series aircraft.\n\nRequirement: Inspect and re-orientate the Hydrolok retaining pin in accordance with B/E Aerospace Alert Service Bulletin 25-20-2658.\n\nNote: CAA (UK) AD 002-11-2001 refers.\n\nCompliance: Before 21 April 2002.\n\nThis Airworthiness Directive becomes effective on 21 March 2002.\n\nBackground: Under certain conditions the Hydrolok pin can migrate and disconnect from the seat structure resulting in the seat back having no rearward restraint and allowing it to rotate aft into the seat or exit pathway behind.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 5 February 2002\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 27 February 2002.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's stated applicability (all B/E Skyluxe II (AA2) seats) and its corrective action (inspect and re‑orientate the Hydrolok pin per the B/E service bulletin) are consistent within the instrument. The text contains no indication that the scope was broadened or narrowed beyond that stated applicability and requirement."},"complexity_factors":["Technical fix delegated to an external document: Requirement refers to B/E Aerospace Alert Service Bulletin 25‑20‑2658 (Requirement).","Wide applicability across fleets: applies to all B/E Aerospace Skyluxe II (AA2) seats installed in multiple Airbus and Boeing types (Applicability).","Short compliance window: effective 21 March 2002 and compliance required before 21 April 2002 (Compliance; Effective date).","Clear safety consequence but technical cause: background describes Hydrolok pin migration leading to loss of rearward restraint (Background).","Regulatory mandate and delegated authority: issued under subregulation 39.1(1) of CAR 1998 by a CASA delegate (introductory text and signature).","Cross-jurisdictional reference: notes CAA (UK) AD 002‑11‑2001, implying alignment with foreign authority (Requirement note).","Limited procedural detail in the AD itself about inspection scope, recordkeeping, or required qualifications — leaves implementation detail to the service bulletin and regulators (AD text vs. referenced service bulletin)."],"plain_english_summary":"This Airworthiness Directive requires inspection and re‑orientation of the Hydrolok retaining pin on all B/E Aerospace Skyluxe II (AA2) passenger seats, following the manufacturer’s Alert Service Bulletin. It affects aircraft operators and maintenance organisations that manage those seats because a migrating pin can disconnect and allow the seat back to rotate rearward, removing rearward restraint and creating an unsafe condition."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical defect in a specific seat model. It has not expanded beyond its initial safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term (Hydrolok pin, explained in context)","Single, clear requirement with no nested conditions or exceptions","No cross-references to other legislation beyond a single reference to a UK aviation directive for information","Straightforward compliance deadline with no alternative methods or phased implementation"],"plain_english_summary":"This AD mandates inspection and corrective action on B/E Aerospace Skyluxe II (AA2) passenger seats to secure a Hydrolok retaining pin that can work loose and allow seat backs to flop rearward. It affects operators of Airbus and Boeing aircraft fitted with these seats and requires re‑orienting the pin per the manufacturer’s service bulletin before 21 April 2002 to prevent injury or blocked emergency egress."}},"importantCases":[],"_links":{"self":"/api/acts/ad-seats-21-b-e-aerospace-seat-hydrolock-pin-orientation","history":"/api/acts/ad-seats-21-b-e-aerospace-seat-hydrolock-pin-orientation/history","analysis":"/api/acts/ad-seats-21-b-e-aerospace-seat-hydrolock-pin-orientation/analysis","conflicts":"/api/acts/ad-seats-21-b-e-aerospace-seat-hydrolock-pin-orientation/conflicts","importantCases":"/api/acts/ad-seats-21-b-e-aerospace-seat-hydrolock-pin-orientation/important-cases","documents":"/api/acts/ad-seats-21-b-e-aerospace-seat-hydrolock-pin-orientation/documents"}}