{"id":"F2006B10803","name":"AD/IAI-W/27 Amdt 1 - Rudder","slug":"ad-iai-w-27-amdt-1-rudder","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56279,"registerId":"commonwealth-F2006B10803-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/IAI-W/27 Amdt 1 - Rudder","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/IAI-W/27 and issues the following 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\nIsrael Aircraft Industries 1123 and 1124 (Westwind) Series Aeroplanes\n\nAD/IAI-W/27\n\nAmdt 1\n\n  \nRudder 2/2004\n\nDM\n\nApplicability: Model 1121, 1121A, 1121B, 1123, 1124, 1124A Jet Commander, Commodore Jet, and Westwind aircraft.\n\nRequirement: Inspect in accordance with Israel Aircraft Industries Service Bulletin 1121-55-030R1, 1123-55-056R1, or 1124-55-150R1, as applicable.\n\nNote: Israel CAA AD 55-02-12-04R1 refers.\n\nCompliance: Within 50 flight hours after 14 January 2004, unless already accomplished.\n\nThis Amendment becomes effective on 14 January 2004.\n\nBackground: Cracks have been found on rudder skins outside of the area listed in the Structural Inspection Program.\n\nAmendment 1 is issued in response to a revision of the related Israel CAA AD, which requires inspection of additional areas of the rudder for fatigue cracks.\n\n![Signature of David Villiers](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 8 January 2004\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 January 2004.\n\n  \n\nPage 1 of 1","sortOrder":0}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the AD. It updates the inspection requirements to cover additional rudder areas following a revision to the Israeli aviation authority's equivalent directive, but does not expand beyond the original aircraft types or safety purpose."},"complexity_factors":["Single, specific technical requirement (rudder inspection)","Only 3 defined aircraft model categories with clear cross-references to manufacturer service bulletins","Simple compliance deadline (50 flight hours from effective date)","No nested exceptions or conditional logic — applies to all listed aircraft uniformly","Short document (1 page) with straightforward structure: applicability, requirement, compliance, background"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft. Think of it like a car recall, but for planes.\n\n**What it does:**\n- **Revokes and replaces** an earlier safety order (AD/IAI-W/27) with an updated version\n- **Requires inspections** of the rudder (the vertical tail fin that steers the aircraft) on specific Israel Aircraft Industries planes\n- **Why:** Cracks have been discovered in the rudder skin in areas not previously checked, creating a potential safety risk\n\n**Who it affects:**\n- Owners and operators of specific aircraft models: Jet Commander, Commodore Jet, and Westwind series (models 1121, 1121A, 1121B, 1123, 1124, and 1124A)\n\n**What must be done:**\n- Inspect the rudder following specific manufacturer service bulletins\n- Complete the inspection within **50 flight hours** after 14 January 2004 (unless already done)\n\n**Why it matters:**\nFatigue cracks in aircraft structures can lead to catastrophic failure. This directive closes a gap where cracks were found outside the normal inspection zones, ensuring these older aircraft remain safe to fly."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the scope of inspection to additional rudder areas in response to a revision of the related Israel CAA AD and findings of cracks outside the existing Structural Inspection Program (Background; \"Amendment 1 is issued in response to a revision of the related Israel CAA AD\")."},"complexity_factors":["Narrow technical scope: focuses only on rudder skins and fatigue cracks (Background).","Clear aircraft applicability across several IAI models (Applicability).","Dependence on external documents for procedure: requires following specific IAI Service Bulletins (Requirement).","Short, fixed compliance window creates operational scheduling pressure (Compliance: \"Within 50 flight hours after 14 January 2004\").","Low regulatory discretion: AD issued by CASA delegate under subregulation 39.1(1) and revokes a prior AD (preamble/signature)."],"plain_english_summary":"This Airworthiness Directive requires operators of IAI 1121/1123/1124 series aeroplanes to inspect the rudder per the applicable Israel Aircraft Industries Service Bulletin within 50 flight hours of 14 January 2004. The AD is issued by a CASA delegate under subregulation 39.1(1). \n\nIt responds to cracks found outside the existing Structural Inspection Program and to a revised Israel CAA AD; operators bear the inspection cost, must follow the manufacturer’s instructions, and may need to carry out repairs if cracks are found."}},"importantCases":[],"_links":{"self":"/api/acts/ad-iai-w-27-amdt-1-rudder","history":"/api/acts/ad-iai-w-27-amdt-1-rudder/history","analysis":"/api/acts/ad-iai-w-27-amdt-1-rudder/analysis","conflicts":"/api/acts/ad-iai-w-27-amdt-1-rudder/conflicts","importantCases":"/api/acts/ad-iai-w-27-amdt-1-rudder/important-cases","documents":"/api/acts/ad-iai-w-27-amdt-1-rudder/documents"}}