{"id":"F2006L00729","name":"AD/B737/280 - Aileron Tab","slug":"ad-b737-280-aileron-tab","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136753,"registerId":"commonwealth-F2006L00729-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/280 | Aileron Tab | 4/2006 |\n| ----------- | ----------- | ------ |\n\n| Applicability: | Model 737-100, -200, and -200C series aircraft, with magnesium aileron tab mast fittings and magnesium aileron tab hinge fittings installed.                                                                                                                                                                                                                                                                                                                                                                                                                      |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 69-12-06Amdt 39-780.Note: Boeing Alert Service Bulletin (ASB) 57-1040, dated 26 May 1969, refers.                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of13 April 2006.Note: Replacement of the magnesium aileron tab mast fittings with aluminium tab mast fittings in accordance with SB 57-1040; and the tab control rods replaced with adjustable tab control rods, installed in accordance with SB 27-1025; and replacement of the magnesium aileron tab hinge fittings with aluminium aileron tab hinge fittings, in accordance with ASB 57-1040; constitutes terminating action for the repeat inspection requirements of this Directive. |\n|                | This Airworthiness Directive becomes effective on 13 April 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | This Directive requires inspections to detect cracking in the lugs of the aileron tab mast fittings and the flanges of the aileron tab hinge fittings.                                                                                                                                                                                                                                                                                                                                                                                                            |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n1 March 2006","sortOrder":0},{"sectionNumber":"AD/B737/280","sectionType":"part","heading":"AD/B737/280","content":"## AD/B737/280","sortOrder":1},{"sectionNumber":"Aileron Tab","sectionType":"part","heading":"Aileron Tab","content":"## Aileron Tab","sortOrder":2},{"sectionNumber":"4/2006","sectionType":"part","heading":"4/2006","content":"## 4/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a straightforward adoption of a US FAA Airworthiness Directive for a specific airframe issue. The scope remains tightly focused on inspecting and potentially replacing magnesium aileron tab fittings on specific Boeing 737 models. There is no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 4 substantive sections: Applicability, Requirement, Compliance, and Background","Single technical requirement referencing an external FAA document","One clear terminating action described in plain language","No nested definitions, cross-references to other Australian legislation, or conditional logic beyond the applicability criteria"],"plain_english_summary":"This AD mandates inspections of magnesium aileron tab mast and hinge fittings on older Boeing 737-100/-200/-200C aircraft to detect corrosion-related cracks that could impair roll control. It adopts FAA AD 69-12-06 and Boeing Alert SB 57-1040 for required procedures. Operators comply by repeated inspections until affected fittings are replaced with aluminium parts (and adjustable control rods per the service bulletin), which terminates the inspection requirement."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive's scope applies to the same listed Boeing 737 models equipped with magnesium aileron‑tab fittings and requires inspections for cracking; it provides an explicit terminating action (replacement with aluminium fittings and adjustable control rods) but does not expand the set of affected aircraft or add new component types beyond those listed (Applicability; Compliance, Note)."},"complexity_factors":["Cross-reference to an external instrument: Requirement explicitly directs action 'in accordance with the technical requirements of FAA AD 69-12-06Amdt 39-780' (Requirement), so users must read and apply another document.","Multiple manufacturer service bulletins referenced: Boeing ASB/SB 57-1040 and SB 27-1025 are cited as the technical means to comply and to achieve terminating action (Compliance, Note).","Material‑specific applicability narrows scope to aircraft 'with magnesium aileron tab mast fittings and magnesium aileron tab hinge fittings installed' (Applicability), requiring part-level checks.","Conditional terminating action: replacement of specified components constitutes terminating action for repeat inspections, so operators must track whether replacements have been carried out to alter inspection obligations (Compliance, Note).","Effective-date and compliance sequencing: Directive sets an effective date (13 April 2006) and refers to inspection schedules 'as specified in the Requirement document', leaving detailed timing and intervals to the FAA AD text (Compliance, Requirement).","Operator burden: Owners/operators bear inspection, repair and replacement costs and must implement service-bulletin workscopes to achieve compliance (Applicability, Compliance)."],"plain_english_summary":"This Directive requires operators of Boeing 737‑100, ‑200 and ‑200C aircraft that have magnesium aileron‑tab mast and hinge fittings to inspect for cracking and to carry out repairs or replacements following FAA AD 69‑12‑06 Amendment 39‑780 and the referenced Boeing service bulletins. Operators must perform inspections or replace magnesium fittings with aluminium parts and adjustable control rods to stop repeat inspections. The Civil Aviation Safety Authority delegate made the Directive effective 13 April 2006; operators pay for the work and must follow the FAA/Boeing technical instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-280-aileron-tab","history":"/api/acts/ad-b737-280-aileron-tab/history","analysis":"/api/acts/ad-b737-280-aileron-tab/analysis","conflicts":"/api/acts/ad-b737-280-aileron-tab/conflicts","importantCases":"/api/acts/ad-b737-280-aileron-tab/important-cases","documents":"/api/acts/ad-b737-280-aileron-tab/documents"}}