{"id":"F2006B07205","name":"AD/SWSA226/63 - T10282 Blades (Hard Alloy)","slug":"ad-swsa226-63-t10282-blades-hard-alloy","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48950,"registerId":"commonwealth-F2006B07205-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/63 - T10282 Blades (Hard Alloy)","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/SWSA226/63 T10282 Blades (Hard Alloy) 9/91\n\nApplicability: All HC-B3TN-5 ( ) ( )/T10282 (H) (B) propeller models installed on Swearingen SA226T, SA226T(B), SA22AT, SA226TC Metro aircraft with Garrett Engine model TPE-331-3U-303G, TPE-331-3UW-303G, TPE-331-10UA-501G or -511G.\n\nRequirement: Action in accordance with Hartzell SB 146A.\n\nCarry out a dye penetrant or other Departmentally approved non-destructive inspection to the outer 60 cm area of the subject blades both back and face. Inspect for signs of cracking, propagating from the trailing edge forward.\n\nCompliance: The compliance date of the previous issue of this Directive (AD/PHZL/49 Amdt 3) was 30 June 1986. This Directive is effective from 5 September 1991, and thereafter at intervals not exceeding 100 hours Time in Service.\n\nBackground: This Directive has been amended to list propeller, engine and aircraft combinations affected which have now been identified in the propeller manufacturer’s SB. The inspection has been changed to conform with the requirement of the SB. Soft alloy has been dropped from the heading since the manufacturer has cleared these blades of fault. This AD is raised to incorporate the propeller insp’n in the aircraft series.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The directive was amended to identify specific propeller‑engine‑aircraft combinations, to align the inspection procedure with Hartzell SB 146A, and to remove 'soft alloy' from the heading after the manufacturer cleared those blades. The change narrows and clarifies which combinations are covered and prescribes a specific inspection area/method and recurring interval (Background; Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow, specific applicability: particular propeller model (HC‑B3TN‑5/T10282), aircraft series (SA226/SA227) and Garrett engine models (Applicability clause).","Technical inspection requirement: dye‑penetrant or other Departmentally approved non‑destructive inspection of the outer 60 cm of blade, both face and back (Requirement clause).","Reference to external document: compliance is by following Hartzell SB 146A, creating dependency on a manufacturer service bulletin (Requirement clause).","Recurring compliance burden: mandatory repeat interval not exceeding 100 hours Time in Service (Compliance clause).","Amendment history affects scope and terminology (Background): listing of combinations, change in inspection to match SB, and removal of 'soft alloy' from heading."],"plain_english_summary":"This airworthiness directive requires operators of HC‑B3TN‑5/T10282 (H) Hartzell propellers on specified Swearingen SA226/SA227 aircraft with listed Garrett TPE‑331 engines to perform dye‑penetrant or other CASA‑approved non‑destructive inspections of the outer 60 cm of each blade (face and back) to detect cracks, following Hartzell SB 146A. It took effect on 5 September 1991 and requires repeating the inspection at intervals not exceeding 100 flight hours; operators bear the inspection cost and must follow the CASA AD and the manufacturer’s service bulletin."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"Originally this directive (or its predecessor) applied more broadly to include 'soft alloy' blades. The current version narrows scope by removing soft alloy blades from coverage after the manufacturer cleared them of fault. It also expands scope horizontally by incorporating the propeller inspection into the aircraft series directive structure rather than treating it as a standalone propeller AD, and adds specific engine and aircraft model combinations that were not explicitly listed in earlier versions."},"complexity_factors":["Highly specific technical applicability criteria involving multiple model numbers and part codes (HC-B3TN-5, T10282, TPE-331-3U-303G, etc.)","References external technical document (Hartzell SB 146A) without reproducing its contents","Contains aviation-specific terminology requiring domain knowledge (dye penetrant inspection, Time in Service, trailing edge)","Amends previous directive (AD/PHZL/49 Amdt 3) requiring cross-referencing to understand full compliance history","Conditional logic regarding compliance dates (previous issue vs current issue)"],"plain_english_summary":"This CASA safety inspection order requires operators of Fairchild Swearingen SA226/SA227 Metro aircraft with Garrett engines and HC-B3TN-5 propellers fitted with T10282 hard-alloy blades to inspect the outer 60 cm of each blade, using dye-penetrant or approved non‑destructive testing, for trailing-edge-originating cracks.  \n\nInspections are mandated every 100 flight hours to prevent in‑flight propeller failure; the directive updates and replaces a 1986 order, narrowing scope and removing prior soft‑alloy blade requirements cleared by the manufacturer."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-63-t10282-blades-hard-alloy","history":"/api/acts/ad-swsa226-63-t10282-blades-hard-alloy/history","analysis":"/api/acts/ad-swsa226-63-t10282-blades-hard-alloy/analysis","conflicts":"/api/acts/ad-swsa226-63-t10282-blades-hard-alloy/conflicts","importantCases":"/api/acts/ad-swsa226-63-t10282-blades-hard-alloy/important-cases","documents":"/api/acts/ad-swsa226-63-t10282-blades-hard-alloy/documents"}}