{"id":"F2006B09997","name":"AD/FU24/5 - Elevator Trim Tab Brackets - Modification","slug":"ad-fu24-5-elevator-trim-tab-brackets-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55346,"registerId":"commonwealth-F2006B09997-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/FU24/5 - Elevator Trim Tab Brackets - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Airparts (NZ) Ltd. FU 24 Series Aeroplanes\n\n \n\nAD/FU24/5 Elevator Trim Tab Brackets - Modification 6/62\n\nApplicability: All models prior to S/No. 120 not incorporating Mod. JA/FU24/M82. Document:  James Aviation Mod. JA/FU24/M82.\n\nCompliance: Forthwith.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft series. It has not expanded beyond its original purpose of mandating a known modification to prevent elevator trim tab bracket failure."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 3 operative provisions: applicability, document reference, and compliance","No defined terms section","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Simple conditional logic: applies to all models prior to S/No. 120 NOT incorporating specific modification","Single compliance action with immediate timing","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific Airparts (NZ) Ltd. FU 24 series aeroplanes to modify the **elevator trim tab brackets** (metal parts that help control the plane's pitch stability). The modification is identified as \"Mod. JA/FU24/M82\" from James Aviation.\n\n**Who it affects:** \n- All FU 24 series aircraft with **serial numbers below 120**\n- **Only if** they haven't already had the James Aviation modification M82 installed\n\n**What must be done:** The modification must be carried out **\"forthwith\"** — meaning immediately, without delay.\n\n**Why it matters:** Elevator trim tabs are critical for flight safety. If the brackets fail, the pilot could lose control of the aircraft's pitch (nose-up/nose-down movement). This AD likely addresses a discovered defect or failure pattern that poses an immediate safety risk, hence the urgent compliance deadline."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The source text defines a single, targeted change: require Mod. JA/FU24/M82 for all FU 24 models prior to serial number 120 not already incorporating that modification. The directive itself does not indicate any change from an earlier scope or intent within the supplied text."},"complexity_factors":["Narrow and specific applicability (FU 24 series, serial numbers prior to 120, excluding those already modified)","Single technical reference (James Aviation Mod. JA/FU24/M82) defines the required work","Immediate compliance requirement (\"Forthwith\") increases operational urgency but not technical ambiguity","Lack of procedural detail in the text (no certification steps, no enforcement or cost information) requires external actions by operators","Technical work likely requires skilled maintenance and access to modification documentation"],"plain_english_summary":"This directive requires FU 24 series aeroplanes (serial numbers before 120) that do not already have James Aviation Mod. JA/FU24/M82 fitted to be modified to that configuration—specifically changes to the elevator trim tab brackets—“forthwith.” Owners/operators must obtain the James Aviation instructions, arrange and pay for the work, and ground and schedule aircraft downtime to achieve immediate compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fu24-5-elevator-trim-tab-brackets-modification","history":"/api/acts/ad-fu24-5-elevator-trim-tab-brackets-modification/history","analysis":"/api/acts/ad-fu24-5-elevator-trim-tab-brackets-modification/analysis","conflicts":"/api/acts/ad-fu24-5-elevator-trim-tab-brackets-modification/conflicts","importantCases":"/api/acts/ad-fu24-5-elevator-trim-tab-brackets-modification/important-cases","documents":"/api/acts/ad-fu24-5-elevator-trim-tab-brackets-modification/documents"}}