{"id":"F2006B03766","name":"AD/BEECH 300/12 - Elevator Trim Tab System","slug":"ad-beech-300-12-elevator-trim-tab-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43362,"registerId":"commonwealth-F2006B03766-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 300/12 - Elevator Trim Tab System","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 300/12 Elevator Trim Tab System 3/99\n\nApplicability: Model B300, serial numbers FL-1 through FL-23, FL-25 through FL-134, FL-136, and FL-137.\n\nModel B300C, serial numbers FM-1 through FM-9, and FN-1.\n\nRequirement: Modify the elevator trim tab system in accordance with the Installation Instructions in Raytheon Kit Part Number (P/N) 130-5011-3 or Raytheon Kit P/N 130-5011-9, which contain Beech Aircraft Corporation Drawing 130-5011, Revision E, dated March 21 1996, as referenced in the Compliance section in the Accomplishment Instructions, Part I, Part II, or Part III (whichever is applicable to the aircraft serial number) of Raytheon Mandatory Service Bulletin (MSB) 2620, issued November 1996.\n\nNote 1: The Materials section in Raytheon MSB 2620, provides a breakdown of the aircraft models and serial numbers affected by Part I, Part II, or Part III of the Accomplishment Instructions section.\n\nNote 2: FAA AD 99-02-16 Amdt 39-11008 refers.\n\nCompliance: Unless already accomplished, within 200 hours time in service after 25 March 1999.\n\nThis Airworthiness Directive becomes effective on 25 March 1999.\n\nBackground: The FAA received reports of ice forming on the elevator trim tab actuators and jamming the trim tab control. This Directive requires modifying the elevator trim tab actuators by incorporating a new elevator trim tab actuator assembly kit, replacing the elevator trim tab pushrod assembly, or modifying the elevator spar opening, whichever is applicable.","sortOrder":0}],"analysis":{"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":false,"description":"The directive's scope matches its stated purpose: it targets ice-related jamming risks on elevator trim tab actuators of specific B300/B300C serial numbers and mandates corrective modification per Raytheon kit/MSB, referencing the FAA AD. The text shows no expansion or narrowing of coverage beyond those listed serial numbers or the prescribed modification actions."},"complexity_factors":["Serial-number-specific applicability (Model B300 and B300C with detailed serial ranges) increases administrative burden for owners/operators to determine whether each airframe is captured (Applicability).","Multiple compliance paths tied to aircraft groups (modify actuator assembly, replace pushrod, or modify spar opening) require consulting Raytheon Kit P/Ns and MSB 2620 to identify the correct action for each serial number (Requirement; Background; Note 1).","Dependence on external technical documents (Raytheon Kit P/N 130-5011-3 or -9; Beech Drawing 130-5011 Rev E; Raytheon MSB 2620) means operators must obtain and follow manufacturer instructions precisely (Requirement).","Cross-reference to FAA AD 99-02-16 adds regulatory linkage and may require checking additional material or compliance interpretations (Note 2).","A relatively short mandatory compliance window — within 200 hours time in service after 25 March 1999 — creates scheduling and operational impact for operators (Compliance).","Practical technical work (actuator assembly installation, pushrod replacement, or spar opening modification) requires qualified maintenance resources, parts procurement and downtime, imposing direct costs on owners/operators (Requirement; Background).","'Unless already accomplished' creates a verification/record-keeping requirement for operators to demonstrate compliance status; there is limited discretion beyond following the specified kit/MSB instructions (Compliance; Requirement)."],"plain_english_summary":"This Airworthiness Directive requires specified Beechcraft 300/B300C aeroplanes to have their elevator trim tab systems modified to prevent ice forming on actuators and jamming control. It affects owners/operators of the listed serial-number aircraft, who must arrange the mandated work to the Raytheon kit/MSB specification within 200 flight hours of 25 March 1999, with the operational and financial costs and scheduling disruption borne by those operators."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope as a targeted safety fix for specific aircraft models with identified ice-related control issues. The scope remains limited to the elevator trim tab system modifications for the specified Beechcraft serial numbers."},"complexity_factors":["Multiple specific serial number ranges requiring careful cross-checking (FL-1 through FL-23, FL-25 through FL-134, FL-136, FL-137, FM-1 through FM-9, FN-1)","Three different modification paths depending on aircraft serial number (Part I, Part II, or Part III of manufacturer service bulletin)","Reference to external technical documents (Raytheon Kit P/N 130-5011-3 or 130-5011-9, Beech Aircraft Corporation Drawing 130-5011 Revision E, Raytheon Mandatory Service Bulletin MSB 2620)","Cross-reference to US FAA Airworthiness Directive 99-02-16 Amdt 39-11008","Conditional compliance language ('Unless already accomplished')","Technical aviation terminology requiring specialised knowledge (elevator trim tab actuators, pushrod assembly, elevator spar opening)"],"plain_english_summary":"This mandatory safety order requires owners/operators of specified Beechcraft Model B300 and B300C aircraft (listed serial numbers) to modify the elevator trim tab system using manufacturer kits to prevent ice buildup that can jam controls and cause loss of control. The modification must be completed within 200 flight hours after 25 March 1999; failure to comply creates unsafe flight conditions and regulatory exposure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-300-12-elevator-trim-tab-system","history":"/api/acts/ad-beech-300-12-elevator-trim-tab-system/history","analysis":"/api/acts/ad-beech-300-12-elevator-trim-tab-system/analysis","conflicts":"/api/acts/ad-beech-300-12-elevator-trim-tab-system/conflicts","importantCases":"/api/acts/ad-beech-300-12-elevator-trim-tab-system/important-cases","documents":"/api/acts/ad-beech-300-12-elevator-trim-tab-system/documents"}}