{"id":"F2006B03955","name":"AD/BEECH 50/31 - Rudder and Elevator Trim Tab Systems","slug":"ad-beech-50-31-rudder-and-elevator-trim-tab-systems","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43564,"registerId":"commonwealth-F2006B03955-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 50/31 - Rudder and Elevator Trim Tab Systems","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 50 (Twin Bonanza) Series Aeroplanes\n\nAD/BEECH 50/31 Rudder and Elevator Trim Tab Systems 6/80\n\nApplicability: All model 50 with S/Nos. H-1 to H-11;\n\nAll model B50 with S/Nos. CH-12 to CH-360;\n\nAll models D50, D50A, D50B, D50C & D50E with S/Nos. DH-1 to DH-347; All model E50 with S/Nos. EH-1 to EH-70;\n\nAll model F50 with S/Nos. FH-71 to FH-93, FH-95 and FH-96; All model G50 with S/Nos. GH-94 and GH-97 to GH-119;\n\nAll model H50 with S/Nos. HH-120 to HH-149; All model J50 with S/Nos. JH-150 to JH-176.\n\nRequirement: Action in accordance with Beechcraft SI No. 0691-133, \\-135 Rev. 2.\n\nCompliance: Within 100 hours’ time in service after 30 June 1980 and thereafter at intervals not exceeding 100 hours’ time in service.\n\nBackground: Beechcraft SI No. 0691-133, -135 Rev. 2 provides inspection procedures and trim tab free play limitations which will indicate when excessive wear has occurred in trim tab linkages or actuators.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2635},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow technical scope. It addresses a specific mechanical wear issue in trim tab systems for defined aircraft models, with no expansion into broader operational or certification requirements beyond the original safety intent."},"complexity_factors":["Applicability spans nine aircraft models with eleven distinct serial number ranges requiring cross-referencing","Incorporation by reference of external technical standard (Beechcraft SI No. 0691-133/-135 Rev. 2) without reproducing the actual inspection procedures","Technical aeronautical terminology (trim tab actuators, control linkages, free play limits, time in service)","Dual-phase compliance structure requiring calculation of initial compliance deadline followed by recurring intervals"],"plain_english_summary":"This directive requires owners/operators of specified Beechcraft Twin Bonanza 50-series aircraft (listed by serial number) to perform recurring inspections of the rudder and elevator trim tab systems for excessive wear. Inspections must follow Beechcraft Service Information Nos. 0691-133 and -135, Revision 2, with the first check within 100 flight hours and repeat inspections at intervals not to exceed 100 flight hours."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-50-31-rudder-and-elevator-trim-tab-systems","history":"/api/acts/ad-beech-50-31-rudder-and-elevator-trim-tab-systems/history","analysis":"/api/acts/ad-beech-50-31-rudder-and-elevator-trim-tab-systems/analysis","conflicts":"/api/acts/ad-beech-50-31-rudder-and-elevator-trim-tab-systems/conflicts","importantCases":"/api/acts/ad-beech-50-31-rudder-and-elevator-trim-tab-systems/important-cases","documents":"/api/acts/ad-beech-50-31-rudder-and-elevator-trim-tab-systems/documents"}}