{"id":"F2006B03664","name":"AD/BEECH 1900/45 - Engine Controls Cross Shaft","slug":"ad-beech-1900-45-engine-controls-cross-shaft","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43254,"registerId":"commonwealth-F2006B03664-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)\n\nBeechcraft 1900 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BEECH 1900/45 Engine Controls Cross S","sectionType":"part","heading":"AD/BEECH 1900/45 Engine Controls Cross Shaft 11/2004","content":"# AD/BEECH 1900/45 Engine Controls Cross Shaft 11/2004\n\nApplicability: Raytheon (Formely Beech) model 1900, 1900C, and 1900D aeroplanes having serial numbers as detailed in Raytheon Aircraft Company Mandatory Service Bulletin No. SB 73–3634, dated September 2003.\n\nRequirement: 1. Inspect the engine controls/cross shaft/pedestal for proper installation and carry out a torque check of the attach bolts, in accordance with Part I, Accomplishment Instructions of Raytheon Aircraft Company Mandatory Service Bulletin No. SB 73–3634.\n\n    2. If any improper installation or wrong torque is found during any inspection required by Requirement 1 of this Directive, correct the installation or torque in accordance with Part I, Accomplishment Instructions of Raytheon Aircraft Company Mandatory Service Bulletin No. SB 73–3634.\n\n    3. Unless previously accomplished modify the pedestal and replace the engine controls cross shaft hardware in accordance with Part II, Accomplishment Instructions of Raytheon Aircraft Company Mandatory Service Bulletin No. SB 73-3634.\n\nModification of the pedestal and replacement of the engine controls cross shaft hardware is the terminating action for the repetitive inspection and re-torque requirements specified in Requirement 1 of this Directive.\n\nNote 1: FAA AD 2004-17-02 Amdt 39-13774 refers.\n\nNote 2: The aeroplane maintenance manual also addresses the issues detailed in Requirements 1,2 and 3 of this Directive.\n\nCompliance: For Requirement 1: Initially inspect within the next 50 hours time-in-service (TIS) after the effective date of this Directive, unless already done within the last 50 hours TIS, and thereafter at intervals not to exceed 100 hours TIS until the modification in Requirement 3 of this Directive is done.\n\nFor Requirement 2: Before further flight.\n\nFor Requirement 3: At the next scheduled Maintenance/inspection interval or 12 calendar months after the effective date of this Directive, whichever occurs later.","sortOrder":1}],"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":3,"scope_assessment":{"changed":false,"description":"The Directive enforces inspections, corrective action and a terminating modification for the listed Beechcraft 1900 series aircraft as set out in the Raytheon service bulletin and compliance schedule. It does not expand or narrow the stated applicability or required actions beyond those set in the Directive and referenced service instructions."},"complexity_factors":["Technical maintenance tasks: torque checks and hardware replacement require qualified maintenance personnel and standard tools (Requirement 1–3).","Repetitive inspection schedule: initial check within 50 hours TIS, then every 100 hours TIS until modification (Compliance to Requirement 1) increases ongoing compliance burden.","Mandatory corrective action before further flight if defects found (Requirement 2) imposes operational disruption risk and potential AOG costs.","Terminating modification timing linked to next scheduled maintenance or 12 months (Requirement 3) requires coordination with operators' maintenance planning.","Applicability limited to serial numbers referenced in Raytheon SB 73‑3634 introduces dependency on the OEM service bulletin for scope (Applicability; Requirement references).","Cross-reference to FAA AD and maintenance manual creates multiple source documents to reconcile (Note 1 and Note 2)."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Beechcraft 1900 series aeroplanes (serial numbers listed in Raytheon SB 73‑3634) to inspect the engine‑controls cross shaft and attach‑bolt torque, correct any improper installation or torque before further flight, and complete a pedestal modification and hardware replacement as the terminating action (Requirements 1–3; Compliance). Operators fund and schedule the inspections, repairs and modification; CASA enforces the timing and required actions, and aircraft must repeat inspections until the terminating modification is done."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive addressing a specific unsafe condition in a particular aircraft type. It has not expanded beyond its original purpose of mandating inspection and modification of engine controls cross shafts."},"complexity_factors":["Short, single-purpose document focused on one mechanical issue","Only 3 requirements with clear sequential logic (inspect → fix if needed → permanent modification)","Cross-reference to one external technical document (manufacturer Service Bulletin SB 73-3634) for detailed instructions","Simple compliance timeline with three distinct deadlines based on flight hours or calendar months","Minimal defined terms — relies on standard aviation terminology (TIS = time-in-service)","No nested exceptions or conditional logic beyond basic 'if found, then fix' structure"],"plain_english_summary":"This safety order requires owners/operators of certain Beechcraft 1900/1900C/1900D aircraft (serials in SB 73-3634) to inspect and correct the engine controls cross-shaft and its bolts, which may be improperly installed or under-torqued. \n\nLoose or wrong bolts can cause loss of engine power control; the directive mandates prompt inspection, repair, and a permanent pedestal/hardware modification to eliminate the hazard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-1900-45-engine-controls-cross-shaft","history":"/api/acts/ad-beech-1900-45-engine-controls-cross-shaft/history","analysis":"/api/acts/ad-beech-1900-45-engine-controls-cross-shaft/analysis","conflicts":"/api/acts/ad-beech-1900-45-engine-controls-cross-shaft/conflicts","importantCases":"/api/acts/ad-beech-1900-45-engine-controls-cross-shaft/important-cases","documents":"/api/acts/ad-beech-1900-45-engine-controls-cross-shaft/documents"}}