{"id":"F2008L00725","name":"AD/IAI-W/9 Amdt 3 - Horizontal Stabiliser Rear Spar Splice Fitting","slug":"ad-iai-w-9-amdt-3-horizontal-stabiliser-rear-spar-splice-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72762,"registerId":"commonwealth-F2008L00725-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Israel Aircraft Industries 1123 and 1124","sectionType":"division","heading":"Israel Aircraft Industries 1123 and 1124 (Westwind) Series Aeroplanes","content":"### Israel Aircraft Industries 1123 and 1124 (Westwind) Series Aeroplanes\n\n| AD/IAI-W/9 Amdt 3 | Horizontal Stabiliser Rear Spar Splice Fitting | 4/2008 |\n| ----------------- | ---------------------------------------------- | ------ |\n\n| Applicability: | All Model 1124 and 1124A aircraft, all serial numbers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect in accordance with Israel Aircraft Industries Service Bulletin (SB)1124-55-020 Revision 2, or later Israel CAA approved revision.2. If no cracking is evident, repeat the inspection.If cracks are detected, before further flight, replace the splice fitting with a serviceable fitting in accordance with SB 1124-55-021 Revision 3, or later Israel CAA approved revision.Note 1: Incorporation of a Titanium Splice Fitting part number WW4453005-509 (MOD AFC2081) in accordance with the Aircraft Maintenance Manual (AMM) constitutes terminating action for the requirements of this Directive. The considerably longer inspection interval for modified aircraft is included in Chapter 5 of the AMM.Note 2: Israel CAA AD 85-001 R3 refers. |\n| Compliance:    | 1. Within 75 flight hours after 10 April 2008, unless inspected within the last 225 flight hours since compliance with the previous issue of this Directive.2. Inspect at intervals not to exceed 300 flight hours; until a titanium splice fitting (MOD AFC2081) is installed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n|                | This Amendment becomes effective on 10 April 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | Cracks have been found in the splice fitting (hinge assembly) P/N 453005-501 on several aircraft.Amendment 2 reduced the inspection interval from 600 to 300 flight hours.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n\n|     | Amendment 3 is issued in response to a revision of the related CAA AD, which introduces a strengthened aft spar splice fitting made of titanium. There is no additional work required by this issue of the Directive. |\n| --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n28 February 2008","sortOrder":0},{"sectionNumber":"AD/IAI-W/9 Amdt 3","sectionType":"part","heading":"AD/IAI-W/9 Amdt 3","content":"## AD/IAI-W/9 Amdt 3","sortOrder":1},{"sectionNumber":"Horizontal Stabiliser Rear Spar Splice F","sectionType":"part","heading":"Horizontal Stabiliser Rear Spar Splice Fitting","content":"## Horizontal Stabiliser Rear Spar Splice Fitting","sortOrder":2},{"sectionNumber":"4/2008","sectionType":"part","heading":"4/2008","content":"## 4/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 3 does not expand applicability or add new mandatory work beyond existing inspection/replacement requirements. It notes a strengthened titanium splice fitting (MOD AFC2081) as terminating action and aligns the Directive with a revised Israel CAA AD; the Directive’s mechanical requirements and affected fleet remain the same (Requirement, Note 1, Background)."},"complexity_factors":["Clear, limited scope: single part (rear spar splice fitting) on specific models and all serial numbers (Applicability).","Routine maintenance actions: inspect per specified Service Bulletin and replace if cracked (Requirement).","Time-based compliance tied to flight hours with a short initial window and recurring 300‑flight‑hour interval (Compliance).","Conditional terminating action: installing a titanium splice fitting (MOD AFC2081) alters inspection requirements and refers users to the AMM for the new interval (Note 1).","Dependence on external documents and approvals: references to specific IAI Service Bulletins, AMM, and Israel CAA ADs (Requirement, Note 2)."],"plain_english_summary":"This directive requires owners/operators of all Israel Aircraft Industries Westwind Model 1124/1124A aeroplanes to inspect the horizontal stabiliser rear spar splice fitting per IAI Service Bulletin 1124‑55‑020 (or later Israel CAA‑approved revision) and to replace any cracked fitting before further flight. Inspections are due within 75 flight hours (unless recently done) and at intervals not exceeding 300 flight hours until a titanium splice fitting (MOD AFC2081) is fitted; installing that part ends the recurring inspections."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original safety purpose of the directive — addressing cracking in the horizontal stabiliser splice fitting. Amendment 3 merely updates the directive to acknowledge a new titanium replacement part that serves as a permanent fix. The scope has not expanded beyond the specific airworthiness issue originally identified."},"complexity_factors":["Single, clearly defined applicability (two specific aircraft models)","Straightforward two-step requirement: inspect, then either repeat or replace","Only 2 defined compliance timeframes (initial 75 flight hours, then 300-hour intervals)","Minimal cross-referencing (only to specific service bulletins and one prior directive)","Clear terminating action (titanium modification ends inspection obligation)","No nested exceptions or conditional logic beyond the crack/no-crack binary","Short document length (approximately 300 words of substantive content)"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators of IAI Westwind 1124/1124A jets inspect the horizontal stabiliser rear spar splice fitting for cracks per the manufacturer’s service bulletin, with the first check soon after 10 April 2008 and repeat inspections every 300 flight hours until corrective action. Cracked fittings must be replaced before further flight; installing the titanium MOD AFC2081 ends the inspection requirement. The AD addresses cracking that could cause tail structural failure and loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-iai-w-9-amdt-3-horizontal-stabiliser-rear-spar-splice-fitting","history":"/api/acts/ad-iai-w-9-amdt-3-horizontal-stabiliser-rear-spar-splice-fitting/history","analysis":"/api/acts/ad-iai-w-9-amdt-3-horizontal-stabiliser-rear-spar-splice-fitting/analysis","conflicts":"/api/acts/ad-iai-w-9-amdt-3-horizontal-stabiliser-rear-spar-splice-fitting/conflicts","importantCases":"/api/acts/ad-iai-w-9-amdt-3-horizontal-stabiliser-rear-spar-splice-fitting/important-cases","documents":"/api/acts/ad-iai-w-9-amdt-3-horizontal-stabiliser-rear-spar-splice-fitting/documents"}}