{"id":"F2006B07200","name":"AD/SWSA226/59 Amdt 1 - Second Passenger Window Port and Starboard","slug":"ad-swsa226-59-amdt-1-second-passenger-window-port-and-starboard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48920,"registerId":"commonwealth-F2006B07200-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/59 Amdt 1 - Second Passenger Window Port and Starboard","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nFairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\nAD/SWSA226/59\n\nAmdt 1\n\n  \n\nSecond Passenger Window Port and Starboard\n\n  \n9/90 TX\n\nApplicability: Model SA226-AT, SA226-TC, SA227-AT and SA227-AC.\n\nRequirement: 1. Install a placard on or adjacent to the passenger seat closest to the cabin window at Station 181. Where propeller rotation is:\n\n    CCW as viewed from the rear: the starboard seat.\n\n    b. CW as viewed from the rear: the port seat.\n\nThe placard is to be in clear view of the cabin occupants with lettering no smaller than 50 mm in height and shall read:\n\n\\`DO NOT OCCUPY THIS SEAT AT ANY TIME’.\n\n2. Modify the relevant window installation in accordance with Fairchild SBs 227-56- 004 or 226-56-004 as applicable. This removes the Para 1 requirement.\n\nNote: FAA AD 90-12-14 initial reference.\n\nCompliance: 1. Prior to further flight after 28 June 1990.\n\n2. Prior to 31 July 1990.\n\nBackground: There have been reports overseas of the second window on the right hand side being damaged by ice shed from the propeller blades. In two cases the windows failed resulting in rapid decompression. Amendment 1 is due to the Authority being made aware of the existence of differing propeller rotation in various engine installations. This would then put the port window at risk rather than the starboard item.","sortOrder":0}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope — preventing ice-damage to passenger windows. Amendment 1 simply expands the technical coverage to account for aircraft with opposite propeller rotation, ensuring the safety measure applies correctly to all affected aircraft variants. The core purpose (window protection and occupant safety) remains unchanged."},"complexity_factors":["Short, single-purpose directive with only 2 compliance pathways","Minimal defined terms (only standard aviation references like 'Station 181')","Simple conditional logic based on propeller rotation direction (CW vs CCW)","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Clear, specific compliance dates","Single amendment addressing a specific technical correction (propeller rotation variants)"],"plain_english_summary":"This CASA Airworthiness Directive targets specific Fairchild Swearingen types (SA226/SA227) after propeller-thrown ice shattered a window, risking rapid decompression. Operators must either place a \"DO NOT OCCUPY THIS SEAT AT ANY TIME\" placard at the at‑risk Station 181 seat (side depends on propeller rotation) or carry out the manufacturer's window modification, after which the placard is removed. The amendment fixes an initial rotation-direction oversight."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 expands/clarifies the scope of the original directive by recognising differing propeller rotation across installations: either the port or starboard second-window seat may be at risk. It adds the immediate placard requirement until the window modification specified in the service bulletins is completed."},"complexity_factors":["Limited applicability to specific models (SA226-AT, SA226-TC, SA227-AT, SA227-AC) reduces breadth but requires fleet identification.","Two-step compliance: an immediate operational restriction (placard) and a later physical modification (service-bulletin work).","Determination of which seat to block depends on propeller rotation orientation (CCW vs CW as viewed from the rear), requiring operator knowledge of engine installation.","Precise placard specifications (minimum 50 mm lettering, location at station 181) impose a small compliance-detail burden.","References specific manufacturer service bulletins (Fairchild SBs 227-56-004 or 226-56-004) for the modification, creating dependence on maintenance capability and parts.","Tight deadlines (placard prior to further flight; modification by a set date) introduce scheduling and operational disruption risk.","Operational impact on passenger seating and potential commercial effects for aircraft in service while placarded."],"plain_english_summary":"Requires operators of Fairchild (Swearingen) SA226 and SA227 aeroplanes to mark one passenger seat beside the second cabin window as unusable and to modify the window installation per the manufacturer’s service bulletin. The specific seat to block depends on propeller rotation (port or starboard). This prevents propeller-ice damage and possible rapid decompression. Operators pay the compliance costs: fit a visible 50 mm-letter placard immediately and carry out the window modification by the stated deadline to restore seat use."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-59-amdt-1-second-passenger-window-port-and-starboard","history":"/api/acts/ad-swsa226-59-amdt-1-second-passenger-window-port-and-starboard/history","analysis":"/api/acts/ad-swsa226-59-amdt-1-second-passenger-window-port-and-starboard/analysis","conflicts":"/api/acts/ad-swsa226-59-amdt-1-second-passenger-window-port-and-starboard/conflicts","importantCases":"/api/acts/ad-swsa226-59-amdt-1-second-passenger-window-port-and-starboard/important-cases","documents":"/api/acts/ad-swsa226-59-amdt-1-second-passenger-window-port-and-starboard/documents"}}