{"id":"F2006B07219","name":"AD/SWSA226/76 - Main Landing Gear Door Actuator","slug":"ad-swsa226-76-main-landing-gear-door-actuator","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49008,"registerId":"commonwealth-F2006B07219-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/76 - Main Landing Gear Door Actuator","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\n \n\nAD/SWSA226/76 Main Landing Gear Door Actuator 4/96\n\nApplicability: Models SA226-T, SA226-T(B), SA226-AT and SA226-TC S/N range as specified in the requirement document.\n\n \n\nRequirement: Unless previously carried out, action in accordance with Fairchild Aircraft Service Bulletin 226-32-059 dated February 14, 1991.\n\n \n\nNote: FAA AD 95-25-07 amdt 39-9452 refers.\n\n \n\nCompliance: Within 1000 hours time in service from 28 March 1996.\n\n \n\nBackground: The manufacturer has advised that if the gear door actuator is misrigged the gear doors may fail to open.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive enforces, for the listed models and specified serial numbers, the corrective action described in the manufacturer's service bulletin (Requirement, Applicability). The text ties the AD directly to the manufacturer's recommendation (Background) and does not expand the set of required actions beyond mandating that the service-bulletin work be performed within a defined time window (Compliance)."},"complexity_factors":["Dependence on an external technical document (Fairchild Service Bulletin 226-32-059) for the actual corrective steps (Requirement).","Applicability limited to specific models and serial number ranges that are not printed in the AD text but are set out in the requirement document (Applicability).","A fixed compliance window (1000 hours from a specific date) that requires scheduling against flight hours rather than calendar time (Compliance).","Allowance for prior compliance (\"unless previously carried out\"), which creates an administrative requirement to verify and document earlier work (Requirement).","Cross-reference to a related FAA AD, requiring operators to consider parallel regulatory material (Note)."],"plain_english_summary":"This AD mandates that operators of specified Fairchild (Swearingen) SA226 series aircraft carry out the corrective action in Fairchild Service Bulletin 226-32-059 (or confirm it was done), to address a misrigged main landing‑gear door actuator that can prevent gear doors opening.\n\nIt sets a firm compliance window and affects owners/operators of the named models; it also cross‑references a related FAA AD."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of ensuring landing gear door actuator safety."},"complexity_factors":["Very short document — approximately 150 words of substantive content","Only 4 defined aircraft models in applicability section","Single requirement referencing an external technical document (Service Bulletin)","Simple compliance deadline (hours-based, not conditional)","No nested exceptions, cross-references to other legislation, or conditional logic","Background explanation is straightforward and non-technical"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nOrders owners and operators of specific Fairchild (Swearingen) aircraft models to inspect and fix a problem with the **main landing gear door actuator** — the hydraulic or mechanical device that opens and closes the landing gear doors.\n\n**Who it affects:**\nOwners and operators of these specific aircraft models:\n- SA226-T\n- SA226-T(B) \n- SA226-AT\n- SA226-TC\n\n(Only specific serial numbers listed in the manufacturer's service bulletin — not every plane of these types.)\n\n**Why it matters:**\nIf the gear door actuator is **misrigged** (improperly adjusted or installed), the landing gear doors might not open when needed. This could prevent the landing gear from deploying properly during landing — a serious safety risk.\n\n**What must be done:**\nFollow the instructions in **Fairchild Aircraft Service Bulletin 226-32-059** (dated 14 February 1991). This is a technical document from the manufacturer explaining exactly how to inspect and correct the problem.\n\n**When it must be done:**\nWithin **1,000 flight hours** after 28 March 1996.\n\n**Key point:** This directive references a US Federal Aviation Administration (FAA) directive (AD 95-25-07), showing Australia often aligns its safety rules with American aviation standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-76-main-landing-gear-door-actuator","history":"/api/acts/ad-swsa226-76-main-landing-gear-door-actuator/history","analysis":"/api/acts/ad-swsa226-76-main-landing-gear-door-actuator/analysis","conflicts":"/api/acts/ad-swsa226-76-main-landing-gear-door-actuator/conflicts","importantCases":"/api/acts/ad-swsa226-76-main-landing-gear-door-actuator/important-cases","documents":"/api/acts/ad-swsa226-76-main-landing-gear-door-actuator/documents"}}