{"id":"F2006L02493","name":"AD/B727/204 - Outboard Aileron Balance Tab and Rudder Tab Vibration","slug":"ad-b727-204-outboard-aileron-balance-tab-and-rudder-tab-vibration","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":59691,"registerId":"commonwealth-F2006L02493-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 727 Series Aeroplanes","sectionType":"division","heading":"Boeing 727 Series Aeroplanes","content":"### Boeing 727 Series Aeroplanes\n\n| AD/B727/204 | Outboard Aileron Balance Taband Rudder Tab Vibration | 9/2006 |\n| ----------- | ---------------------------------------------------- | ------ |\n\n| Applicability: | Model 727, 727C, 727-100, -100C, -200, and 200F series aircraft; as identified in Boeing Special Attention Service Bulletin 727-27-0234, or later FAA approved revision.                                                                          |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2006-13-16Amdt 39-14669.                                                                                                                                                           |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                         |\n|                | This Airworthiness Directive becomes effective on 31 August 2006.                                                                                                                                                                                 |\n| Background:    | The FAA received reports of freeplay-induced vibration of the outboard aileron balance tabs and rudder tabs. Uncorrected excessive vibration of the airframe during flight could result in divergent flutter and loss of control of the aircraft. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n19 July 2006","sortOrder":0},{"sectionNumber":"AD/B727/204","sectionType":"part","heading":"AD/B727/204","content":"## AD/B727/204","sortOrder":1},{"sectionNumber":"Outboard Aileron Balance Taband Rudder T","sectionType":"part","heading":"Outboard Aileron Balance Taband Rudder Tab Vibration","content":"## Outboard Aileron Balance Tab  \nand Rudder Tab Vibration","sortOrder":2},{"sectionNumber":"9/2006","sectionType":"part","heading":"9/2006","content":"## 9/2006","sortOrder":3}],"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 instrument adopts and enforces the FAA AD requirements for the specific Boeing 727 variants identified in Boeing Service Bulletin 727-27-0234 (Applicability; Requirement). It does not expand the subject matter beyond the FAA AD’s technical scope or broaden the set of affected aircraft beyond those specified in the service bulletin."},"complexity_factors":["Relies on an external foreign airworthiness directive: Requirement mandates action “in accordance with the technical requirements of FAA AD 2006-13-16Amdt 39-14669” (Requirement).","Uses a manufacturer service bulletin to define affected serials/models: Applicability ties affected aircraft to Boeing Special Attention Service Bulletin 727-27-0234 (Applicability).","Technical nature of mandated work: addresses ‘freeplay-induced vibration’ of control surface balance tabs, which requires inspection, measurement and possible corrective maintenance (Background; Requirement).","Compliance delegation: compliance obligations are set by reference rather than restated, so operators must consult and follow the FAA AD and service bulletin to know required tasks and intervals (Requirement; Compliance).","Operational timing and administrative effect: AD sets an effective date (31 August 2006), which creates a firm start date for compliance obligations (Compliance).","Regulatory authority and signature: instrument issued under the Civil Aviation Safety Authority through its Delegate, indicating national enforcement despite reliance on FAA material (signature block)."],"plain_english_summary":"This Airworthiness Directive requires operators of the listed Boeing 727 series aeroplanes to perform the inspections and any corrective actions described in FAA AD 2006-13-16 and the referenced Boeing Special Attention Service Bulletin 727-27-0234. It addresses freeplay-induced vibration of outboard aileron balance tabs and rudder tabs because, if uncorrected, that vibration can progress to divergent flutter and possible loss of control."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a clear, narrow scope: addressing a specific vibration defect in specific Boeing 727 aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined term implicitly referenced (the Boeing Service Bulletin)","Single operative requirement: 'do what the FAA says'","No nested conditions or exceptions","No cross-references to other Australian legislation","Incorporation by reference to external technical document (FAA AD) rather than setting out requirements directly"],"plain_english_summary":"This Airworthiness Directive orders owners and operators of specified Boeing 727 series aircraft (those covered by Boeing Service Bulletin 727-27-0234) to follow FAA AD 2006-13-16 to correct excessive vibration in outboard aileron balance tabs and rudder tabs. The fixes, effective 31 August 2006 and due by the FAA’s compliance dates, prevent divergent flutter that could cause catastrophic loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-204-outboard-aileron-balance-tab-and-rudder-tab-vibration","history":"/api/acts/ad-b727-204-outboard-aileron-balance-tab-and-rudder-tab-vibration/history","analysis":"/api/acts/ad-b727-204-outboard-aileron-balance-tab-and-rudder-tab-vibration/analysis","conflicts":"/api/acts/ad-b727-204-outboard-aileron-balance-tab-and-rudder-tab-vibration/conflicts","importantCases":"/api/acts/ad-b727-204-outboard-aileron-balance-tab-and-rudder-tab-vibration/important-cases","documents":"/api/acts/ad-b727-204-outboard-aileron-balance-tab-and-rudder-tab-vibration/documents"}}