{"id":"F2006B07223","name":"AD/SWSA226/80 Amdt 1 - Elevator Torque Tube Corrosion","slug":"ad-swsa226-80-amdt-1-elevator-torque-tube-corrosion","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49024,"registerId":"commonwealth-F2006B07223-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/80 Amdt 1 - Elevator Torque Tube Corrosion","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/SWSA226/80\n\nAmdt 1\n\n  \nElevator Torque Tube Corrosion 9/97\n\nApplicability: The following models and serial numbers which do not have elevator torque tube Part Numbers 27-44026-005, 27-44026-007, and 27-44026-SEO-1-03, installed; models:\n\nSA226-T S/N T201 to T275 and T277 to T291, SA226-T(B) S/N T(B)276 and T(B)292 to T(B)417, SA226-AT S/N AT001 to AT074,\n\nSA226-TC S/N TC201 to TC419, SA227-TT S/N TT421 to TT541, SA227-AT S/N AT423 to AT695,\n\nSA227-AC S/N AC406, AC415, AC416 and AC420 to AC772, and SA227-BC S/N BC762, BC764, BC766, BC770, BC771 and BC772.\n\nRequirement: Action in accordance with Fairchild Aircraft SBs 226-27-050 or 227-27-028, as applicable; except that defective elevators are to be replaced with Part Numbers 27- 44026-005, 27-44026-007, or 27-44026-SEO-1-03.\n\nNote: FAA AD 97-10-13 refers.\n\nCompliance: Within 6 months after 2 January 1997 for all Applicable aircraft other than SA227-BC.\n\nFor Model SA227-BC, before 14 February 1998.\n\nThe initial issue of this directive had effect from 2 January 1997, this Amendment has effect from 14 August 1997.\n\nBackground: Several reports of corrosion found in the elevator torque tube of affected aircraft have prompted this Directive. The Directive requires drilling access holes in the torque tube and inspecting for corrosion; and applying a corrosion preventative compound or replacing the torque tube if necessary.\n\nAmendment 1 expands the Applicability to include the Model 227-BC, and provides additional acceptable part number torque tubes for use as replacement items.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"The original directive (effective 2 January 1997) was amended to expand applicability to include Model SA227-BC aircraft and to add additional acceptable replacement part numbers. This represents a modest expansion of scope to cover more aircraft and provide operators with more replacement options, rather than a fundamental change in purpose."},"complexity_factors":["Highly specific applicability criteria requiring cross-referencing of aircraft model, serial number, and part numbers","Multiple compliance dates differentiated by aircraft model","Reference to external technical documents (Fairchild Service Bulletins 226-27-050 and 227-27-028) without reproducing their content","Nested exception: applicability excludes aircraft with specific part numbers already installed","Cross-reference to foreign regulatory document (FAA AD 97-10-13) for additional context"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of certain Fairchild (Swearingen) SA226/SA227 aircraft to inspect elevator torque tubes for corrosion and either treat or replace them per the manufacturer’s service bulletins. Aircraft already fitted with improved torque tubes are exempt.\n\nCompliance deadlines: most affected aircraft within six months after 2 Jan 1997; SA227-BC models by 14 Feb 1998. The action prevents control-system failure from corrosion."},"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":4,"scope_assessment":{"changed":true,"description":"Amendment 1 broadened the original directive by adding Model SA227-BC to the applicability and by listing additional acceptable torque-tube part numbers for replacement; the core inspection-and-replace requirement remains the same."},"complexity_factors":["Technical specificity: mandates a particular inspection method (drilling access holes) and remedial actions (compound or replacement).","Parts and serial-number specificity: applicability depends on exact models, serial number ranges and installed part numbers.","Cross-references: requires action in accordance with manufacturer Service Bulletins and refers to an FAA AD, creating layered compliance obligations.","Deadlines: different compliance dates for SA227-BC versus other affected aircraft increase scheduling complexity.","Operational impact: inspections and replacements cause aircraft downtime and direct costs to operators.","Replacement constraints: only specified part numbers are acceptable replacements, limiting sourcing options."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Fairchild (Swearingen) SA226/SA227 aeroplanes to drill inspection access holes, inspect elevator torque tubes for corrosion, and either apply a corrosion-preventative compound or replace the torque tube with one of the specified part numbers. It targets aircraft listed by model and serial number that do not already have part numbers 27-44026-005, -007 or -SEO-1-03 fitted. Operators pay for inspections and repairs; the Civil Aviation Safety Authority enforces compliance within set deadlines (Requirement; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-80-amdt-1-elevator-torque-tube-corrosion","history":"/api/acts/ad-swsa226-80-amdt-1-elevator-torque-tube-corrosion/history","analysis":"/api/acts/ad-swsa226-80-amdt-1-elevator-torque-tube-corrosion/analysis","conflicts":"/api/acts/ad-swsa226-80-amdt-1-elevator-torque-tube-corrosion/conflicts","importantCases":"/api/acts/ad-swsa226-80-amdt-1-elevator-torque-tube-corrosion/important-cases","documents":"/api/acts/ad-swsa226-80-amdt-1-elevator-torque-tube-corrosion/documents"}}