{"id":"F2006B03765","name":"AD/BEECH 300/11 - Main Landing Gear Clevis Assembly","slug":"ad-beech-300-11-main-landing-gear-clevis-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43361,"registerId":"commonwealth-F2006B03765-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 300/11 - Main Landing Gear Clevis Assembly","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)  \nBeechcraft 300 Series Aeroplanes\n\nAD/BEECH 300/11 Main Landing Gear Clevis Assembly 1/99\n\nApplicability: Models and serial numbers listed in Raytheon Aircraft Mandatory Service Bulletin (MSB) 2728.\n\nRequirement: Replace the left and right main landing gear actuator clevis assembly with a clevis assembly of improved design in accordance with the Accomplishment Instructions section in Raytheon Aircraft MSB 2728 or MSB 2728 Revision 1.\n\nNote: FAA AD 98-21-35 Amdt 39-10843 refers.\n\nCompliance: Unless already accomplished, within 200 hours time in service after 28 January 1999.\n\nThis Airworthiness Directive becomes effective on 28 January 1999.\n\nBackground: The FAA received reports of main landing gear failure on two of the affected aircraft. The actions specified by this Directive are intended to prevent failure of the actuator clevis assembly in the main landing gear caused by fatigue cracking of the original design part, which could lead to loss of control of the aircraft during landing operations.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety-critical mechanical defect. The scope remains precisely limited to the identified landing gear component failure mode."},"complexity_factors":["Single, specific mechanical requirement (replace one part)","Only one defined applicability criterion (specific models/serial numbers in external document)","Single compliance condition (200 hours time in service)","No nested exceptions or conditional logic","Cross-reference to only one external technical document (Raytheon MSB 2728) and one related FAA directive","Total length: approximately 150 words"],"plain_english_summary":"This Airworthiness Directive orders owners/operators of certain Beechcraft 300 series aeroplanes (as listed in Raytheon MSB 2728) to replace the main landing gear actuator clevis assemblies on both sides because fatigue cracking has led to gear failures. Compliance is mandatory to prevent in‑flight landing gear collapse and potential loss of control, with the replacement required within 200 flight hours after 28 January 1999 unless already completed."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD retains its original, targeted scope: replacing clevis assemblies on the specific Beechcraft 300-series aircraft listed in Raytheon MSB 2728 to prevent fatigue cracking. It does not expand coverage beyond the MSB-listed models/serials, and it delegates technical execution to the manufacturer’s mandatory service bulletin while imposing a fixed compliance window."},"complexity_factors":["Limited applicability: only models/serial numbers listed in Raytheon MSB 2728 are affected (Applicability).","Single prescriptive action: mandatory replacement of left and right actuator clevis assemblies (Requirement).","Compliance window defined and short relative to flight hours: within 200 hours time-in-service after 28 January 1999 (Compliance).","Procedural dependency: detailed instructions and identification of affected aircraft are provided by Raytheon MSB 2728 or Revision 1 (Requirement → reliance on MSB).","Operator burden: acquisition of replacement parts, scheduling downtime and labour costs are borne by aircraft owners/operators (Requirement/Compliance).","Safety-critical consequence: measure addresses fatigue cracking that could lead to loss of control on landing (Background), increasing urgency and inspection/maintenance standards.","Regulatory linkage: references FAA AD 98-21-35, creating cross-jurisdictional alignment but requiring operators to track both CASA AD and manufacturer MSB (Note/Background).","Recordkeeping and enforcement: CASA issues the AD and enforces compliance; operators must evidence completed work to regulators (AD effective date/Compliance).","Potential operational friction: parts availability and maintenance-slot constraints may affect timely compliance (implementation risk)."],"plain_english_summary":"Requires owners/operators of specified Beechcraft 300-series aircraft to replace both left and right main landing gear actuator clevis assemblies with an improved-design part, following Raytheon Service Bulletin instructions. The replacement must be done within 200 hours time-in-service after 28 January 1999. This measure responds to reported fatigue cracking that could cause gear failure during landing. Operators pay for and schedule the work; the Civil Aviation Safety Authority enforces compliance and relies on the manufacturer’s mandatory service bulletin for the technical steps."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-300-11-main-landing-gear-clevis-assembly","history":"/api/acts/ad-beech-300-11-main-landing-gear-clevis-assembly/history","analysis":"/api/acts/ad-beech-300-11-main-landing-gear-clevis-assembly/analysis","conflicts":"/api/acts/ad-beech-300-11-main-landing-gear-clevis-assembly/conflicts","importantCases":"/api/acts/ad-beech-300-11-main-landing-gear-clevis-assembly/important-cases","documents":"/api/acts/ad-beech-300-11-main-landing-gear-clevis-assembly/documents"}}