{"id":"F2006B06088","name":"AD/PC-12/26 - Passenger Oxygen System","slug":"ad-pc-12-26-passenger-oxygen-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114486,"registerId":"commonwealth-F2006B06088-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.002.png)\n\n![](image.002.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.","sortOrder":0},{"sectionNumber":"AD/PC-12/26 Passenger Oxygen System 3/20","sectionType":"part","heading":"AD/PC-12/26 Passenger Oxygen System 3/2001 DM","content":"# AD/PC-12/26 Passenger Oxygen System 3/2001 DM\n\nApplicability: All PC-12 and PC-12/45 aeroplanes, Manufacturer Serial Number MSN 101 up to and including MSN 365 with rear bench seats Pilatus Part Number (P/N) 525.22.12.016 installed.\n\nRequirement: 1. Replace the metered connector and oxygen tubing (together with the related components) in the rear bench in accordance with the Accomplishment Instructions of Pilatus PC-12 Service Bulletin (SB) No 35-002 dated 19 December 2000.\n\n2. Bench seats P/N 525.22.12.016 may not be installed on any aeroplane unless the metered connector and oxygen tubing have been replaced in accordance with Pilatus PC-12 SB 35-002.\n\nNote: FOCA Switzerland AD HB 2001-001 refers.\n\nCompliance: For Requirement 1 \\- Before 24 February 2001.\n\nFor Requirement 2 \\- As of the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 24 January 2001.\n\nBackground: A design review found that the flow of oxygen to each occupant of the rear bench seat was reduced through two metered connections when only one reduction of flow was necessary. This could result in insufficient oxygen flow to the seat occupants during an in-flight emergency requiring oxygen.\n\nThis Directive requires replacement of the metered connector and oxygen tubing to allow an unrestricted flow of oxygen to the outlet manifold.\n\n![Signature of Eugene Paul Holzapfel, Delegate of the Civil Aviation Safety Authority.](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 18 January 2001\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 January 2001.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific design defect in a specific aircraft model. The scope remains precisely limited to the identified unsafe condition in the passenger oxygen system."},"complexity_factors":["Single, clearly defined applicability (specific aircraft serial numbers and part numbers)","Two straightforward requirements with clear compliance dates","No cross-references to other legislation (only references manufacturer's service bulletin and Swiss aviation authority document)","Minimal defined terms (only standard aviation abbreviations like MSN, P/N, SB)","No conditional logic or nested exceptions","Short document (approximately 300 words)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Pilatus PC‑12/45 aeroplanes (serials 101–365) with a specific rear bench seat to replace a metered connector and tubing in the emergency oxygen system per Pilatus Service Bulletin No. 35‑002. The fix, required before 24 February 2001, corrects reduced oxygen flow caused by a double‑metered connection and bars installing these bench seats unless the modification is already completed—preventing inadequate oxygen supply in emergencies."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD sticks to its original, narrow corrective purpose: replace the metered connector and oxygen tubing on specified PC-12 rear bench seats to remove an unnecessary flow reduction. It does not broaden applicability beyond the stated serial-number range or add additional requirements in this text; it sets an effective date and a compliance deadline."},"complexity_factors":["Narrow applicability limited to PC-12/PC-12/45 MSN 101–365 with a specific bench seat P/N 525.22.12.016 (Applicability).","Technical work requires compliance with an external manufacturer Service Bulletin (Pilatus SB 35-002) and replacement of specific components (Requirement).","Fixed short compliance deadline: replacement must be done before 24 February 2001 (Compliance).","Operational restriction: affected bench seats may not be reinstalled until modification is done (Requirement 2).","References to foreign AD and manufacturer documentation require operators to coordinate parts, labour and verification (Note; Requirement)."],"plain_english_summary":"This AD requires operators of Pilatus PC-12 and PC-12/45 aeroplanes (MSN 101–365) fitted with rear bench seats P/N 525.22.12.016 to replace the metered oxygen connector and tubing per Pilatus Service Bulletin SB 35-002 so the rear-seat outlet manifold receives unrestricted oxygen flow. CASA issued the directive; owners/operators must complete the replacement by 24 February 2001 and may not install the affected bench seats unless the modification is done (Requirement; Compliance). The change addresses a design review finding that two metered connections could reduce oxygen flow in an emergency (Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-12-26-passenger-oxygen-system","history":"/api/acts/ad-pc-12-26-passenger-oxygen-system/history","analysis":"/api/acts/ad-pc-12-26-passenger-oxygen-system/analysis","conflicts":"/api/acts/ad-pc-12-26-passenger-oxygen-system/conflicts","importantCases":"/api/acts/ad-pc-12-26-passenger-oxygen-system/important-cases","documents":"/api/acts/ad-pc-12-26-passenger-oxygen-system/documents"}}