{"id":"F2006B02837","name":"AD/B737/136 - Flight Spoiler Control System Inspection","slug":"ad-b737-136-flight-spoiler-control-system-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42179,"registerId":"commonwealth-F2006B02837-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \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 CAR 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 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.","sortOrder":0},{"sectionNumber":"AD/B737/136 Flight Spoiler Control Syste","sectionType":"part","heading":"AD/B737/136 Flight Spoiler Control System Inspection 3/2000","content":"# AD/B737/136 Flight Spoiler Control System Inspection 3/2000\n\nTX\n\nApplicability: All Model 737-100,-200,-300,-400 and \\-500 series aeroplanes.\n\nRequirement: 1. For aeroplanes on which Boeing Alert Service Bulletin 737-27A1213, dated April 23, 1998, has not been accomplished;\n\n    (a) perform a one time detailed visual inspection to verify correct installation of the fastener that connects the input rod of the spoiler mixer mechanism to the torque tube crank, in accordance with Revision 1 of Boeing Alert Service Bulletin, 737-27A 1213.\n\nFor the purposes of this AD, a detailed visual inspection is defined as: “An intensive visual examination of a specific structural area, system, installation , or assembly to detect damage, failure, or irregularity.\n\nAvailable lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector.\n\nInspection aids such as mirror, magnifying lenses, etc. may be used. Surface cleaning and elaborate access procedures may be required.”\n\n    (b) if the fastener is found incorrectly installed during the above inspection either reinstall the fastener, or install a new or another serviceable fastener, in accordance with Revision 1 of the alert service bulletin.\n\n2. For aeroplanes on which Boeing Alert Service Bulletin 737-27A1213, dated April 23, 1998, has been accomplished; replace the nut, bolt, and cotter pin that connects the input rod of the spoiler mixer mechanism to the torque tube crank with a new or serviceable nut, bolt, and cotter pin in accordance with Revision 1 of the alert service bulletin.\n\nNote: FAA AD 99-25-02 issued November 22, 1999 refers.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific unsafe condition in the spoiler control system of specific Boeing 737 models. There is no evidence of scope creep; it remains a targeted safety directive for a defined mechanical issue."},"complexity_factors":["Short, single-purpose directive focused on one mechanical component","Only 2 main conditional branches (service bulletin accomplished vs not accomplished)","Single defined term ('detailed visual inspection') with explicit definition provided","No cross-references to other legislation beyond a note about related FAA directive","Clear applicability section limiting scope to specific Boeing 737 models","Straightforward compliance structure with reference to external Boeing service bulletin for technical procedures"],"plain_english_summary":"This AD requires inspections and corrective action on the flight spoiler control system of Boeing 737-100/200/300/400/500 series aircraft, affecting operators and maintenance organisations. \n\nDepending on prior compliance with a Boeing service bulletin, it mandates either a one‑time detailed visual inspection of a specific spoiler-control fastener (and repair/replacement if incorrect) or replacement of the nut, bolt and cotter pin to ensure reliable spoiler operation and flight safety."},"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 AD's scope matches the instrument's stated intent: inspect and, where necessary, reinstall or replace the fastener connecting the spoiler mixer input rod to the torque-tube crank on specified 737 models. It distinguishes actions based on whether Boeing Alert Service Bulletin 737-27A1213 has been accomplished; no broadened or narrowed applicability is indicated in the text supplied."},"complexity_factors":["Narrow technical focus on a single fastener and linkage assembly (limited scope reduces complexity).","Two conditional compliance paths depending on whether Boeing Alert Service Bulletin 737-27A1213 has been previously accomplished.","Explicitly defined ‘detailed visual inspection’ standard (lighting, inspection aids, cleaning), which prescribes inspection procedure but requires inspector judgment.","Applicability across five 737 model series requires fleet‑wide coordination by operators.","Parts replacement requirement (new or serviceable nut, bolt, cotter pin) creates logistical/parts-availability considerations.","Dependence on external manufacturer documentation (Boeing Alert SB Revision 1) and reference to FAA AD introduces cross-jurisdictional compliance reliance.","Potential for access, disassembly or additional maintenance time depending on aircraft configuration increases operational impact variance."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 737-100/200/300/400/500 series aeroplanes to carry out a one-time, detailed visual inspection of the fastener connecting the spoiler mixer input rod to the torque-tube crank, and to reinstall or replace the fastener if misinstalled. If Boeing Alert Service Bulletin 737-27A1213 has already been done, the AD instead requires replacing the nut, bolt and cotter pin with new or serviceable parts.\n\nStated purpose: to correct an unsafe condition in the spoiler control system. Practical effects: operators bear inspection and parts costs, schedule downtime, and must follow the Boeing service bulletin instructions enforced by CASA."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-136-flight-spoiler-control-system-inspection","history":"/api/acts/ad-b737-136-flight-spoiler-control-system-inspection/history","analysis":"/api/acts/ad-b737-136-flight-spoiler-control-system-inspection/analysis","conflicts":"/api/acts/ad-b737-136-flight-spoiler-control-system-inspection/conflicts","importantCases":"/api/acts/ad-b737-136-flight-spoiler-control-system-inspection/important-cases","documents":"/api/acts/ad-b737-136-flight-spoiler-control-system-inspection/documents"}}