{"id":"F2006B07206","name":"AD/SWSA226/64 - Engine Power Lever","slug":"ad-swsa226-64-engine-power-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48954,"registerId":"commonwealth-F2006B07206-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/64 - Engine Power Lever","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/SWSA226/64 Engine Power Lever 2/92\n\nApplicability: Model Serial Numbers\n\nSA226-T T201 through T275 and T277 through T291 SA226-T(B) T(B)276 and T(B)292 through T(B)417 SA226-AT AT001 through AT074\n\nSA226-TC TC201 through TC419 SA227-TT TT421 through TT541 SA227-AT AT423 through AT695\n\nSA227-AC AC406, AC415, AC416 and AC420 through AC777 SA227-BC BC762, BC764, BC766 and BC777\n\nRequirement: Modify the power lever detent arms and cover assembly in accordance with Fairchild SB 226-76-008 or SB 227-76-002, as applicable.\n\nNote: FAA AD 91-23-04 Amdt 39-8073 refers.\n\nCompliance: Within 100 hours time in service after 3 February 1992.\n\nBackground: This Directive requires a one-time modification of the engine power lever flight idle detent arms and cover assembly. It has been reported that significant wear has caused improper operation of the engine power control levers on the affected aircraft.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive imposes a one‑time modification for the listed SA226/SA227 serial numbers to correct wear on the engine power lever detent arms and cover, to be done in accordance with the named Fairchild service bulletins within 100 hours after 3 February 1992. The text shows no change in scope from that stated purpose and requirement (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Detailed applicability limited to many specific model serial numbers (Applicability).","Mandatory technical modification must follow a manufacturer service bulletin (Requirement).","Fixed and relatively short compliance window tied to flight hours (Compliance).","Cross‑reference to an FAA airworthiness directive, requiring awareness of related foreign regulatory material (Note).","Implementation requires qualified maintenance resources and parts, creating operational scheduling complexity (Requirement; Compliance)."],"plain_english_summary":"The AD mandates a one‑time physical modification of the engine power‑lever flight‑idle detent arms and detent cover on specific Fairchild SA226/SA227 serials, to be done per the referenced Fairchild service bulletin within 100 flight hours after 3 Feb 1992. It affects owners/operators of the listed aircraft, who must pay for and schedule the work because reported wear can cause improper engine power‑lever operation."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, one-time safety directive targeting a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating a power lever modification."},"complexity_factors":["Single, unambiguous requirement with no conditional logic","Only 8 defined model/serial number groupings in applicability section","No cross-references to other legislation or regulations beyond a single note referencing the FAA AD","Clear, fixed compliance deadline (100 hours time in service after specified date)","No exceptions, exemptions, or alternative means of compliance stated","Short document (approximately 200 words) with straightforward mechanical instruction"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety fix ordered by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:** It requires owners or operators of certain Fairchild (Swearingen) SA226 and SA227 series aeroplanes to modify the engine power lever controls. Specifically, they must replace or repair the \"detent arms\" (the mechanical notches that hold the throttle in position) and the cover assembly that protects them.\n\n**Why it matters:** Wear and tear on these parts has been causing the throttle levers to malfunction. In flight, this could mean pilots can't reliably control engine power — a serious safety risk, especially during critical phases like landing or go-arounds.\n\n**Who must comply:** Anyone operating the listed aircraft models with the specified serial numbers (covering SA226-T, SA226-T(B), SA226-AT, SA226-TC, SA227-TT, SA227-AT, SA227-AC, and SA227-BC variants).\n\n**When:** The fix must be done within 100 hours of flying time after 3 February 1992.\n\n**How:** Follow the manufacturer's Service Bulletin (SB 226-76-008 or SB 227-76-002, depending on aircraft model). This references a corresponding US Federal Aviation Administration directive (FAA AD 91-23-04)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-64-engine-power-lever","history":"/api/acts/ad-swsa226-64-engine-power-lever/history","analysis":"/api/acts/ad-swsa226-64-engine-power-lever/analysis","conflicts":"/api/acts/ad-swsa226-64-engine-power-lever/conflicts","importantCases":"/api/acts/ad-swsa226-64-engine-power-lever/important-cases","documents":"/api/acts/ad-swsa226-64-engine-power-lever/documents"}}