{"id":"F2006B10222","name":"AD/GAF-N22/72 - Upper Fin Rear Attachment Points","slug":"ad-gaf-n22-72-upper-fin-rear-attachment-points","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55880,"registerId":"commonwealth-F2006B10222-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAF-N22/72 - Upper Fin Rear Attachment Points","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)  GAF N22 and N24 Series Aeroplanes\n\n \n\nAD/GAF-N22/72 Upper Fin Rear Attachment Points 8/95 TX\n\nApplicability: All Nomad N22 and N24 series aircraft.\n\n \n\nRequirement: Inspect the bores of the upper fin rear attachment bolt holes in the stub fin rear face for radial cracks. Inspect using one of the methods described in ASTA Service Bulletin ANMD-53-19, Accomplishment Instructions, Part 1.\n\n \n\nCompliance: Inspect before 5000 hours time in service or before further flight after 18 May 1995, whichever occurs later.\n\n \n\nBackground:  A fatigue analysis has indicated that the upper fin rear attachment points on the stub fin structure are fatigue sensitive. The repeat inspections for this area are subject to on-going analysis and will be published shortly.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive, as presented, applies to all Nomad N22 and N24 aircraft and mandates inspection of the specified upper fin rear attachment bolt-hole bores per the referenced service bulletin. It does not expand or narrow the stated applicability or inspection requirement beyond what is set out in the instrument; future changes (repeat inspection intervals) are signalled but not yet enacted."},"complexity_factors":["Technical inspection procedure is not fully reproduced in the directive and requires following ASTA Service Bulletin ANMD-53-19 (external technical document).","Two-part compliance trigger: a time-in-service threshold (5,000 hours) and a date/flight-before condition (before further flight after 18 May 1995).","Applicability covers all N22 and N24 series — broad fleet application but narrow structural focus.","Uncertainty about future repeat-inspection intervals: text notes repeat inspections are subject to ongoing analysis and will be published later.","Operational and cost burden sits with aircraft owners/operators who must perform or contract inspections; enforcement by CASA creates regulatory compliance risk."],"plain_english_summary":"This airworthiness directive requires all GAF Nomad N22 and N24 aeroplanes to have the bores of the upper fin rear attachment bolt holes inspected for radial cracks using one of the methods in ASTA Service Bulletin ANMD-53-19 (Accomplishment Instructions, Part 1). Inspections must occur before 5,000 hours time in service or before further flight after 18 May 1995, whichever is later. Aircraft owners/operators must arrange and fund the inspections; the Civil Aviation Safety Authority enforces compliance because a fatigue analysis identified sensitivity at these attachment points."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on fatigue cracking in one aircraft component. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific mechanical inspection requirement with clear method reference","Simple binary applicability (all N22/N24 series aircraft)","Straightforward compliance deadline using 'whichever occurs later' logic","Only one defined technical term ('time in service') used in standard aviation sense","No cross-references to other legislation or complex conditional exceptions","Document is essentially a one-page safety bulletin format"],"plain_english_summary":"CASA orders owners/operators of GAF Nomad N22/N24 aircraft to inspect the upper fin rear attachment bolt holes for radial fatigue cracks, using ASTA Service Bulletin ANMD‑53‑19, before 5,000 flight hours or before the next flight after 18 May 1995. Cracked fittings could allow the tail fin to detach in flight, risking catastrophic loss of control; the directive follows engineering findings that this area fatigues faster than expected."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gaf-n22-72-upper-fin-rear-attachment-points","history":"/api/acts/ad-gaf-n22-72-upper-fin-rear-attachment-points/history","analysis":"/api/acts/ad-gaf-n22-72-upper-fin-rear-attachment-points/analysis","conflicts":"/api/acts/ad-gaf-n22-72-upper-fin-rear-attachment-points/conflicts","importantCases":"/api/acts/ad-gaf-n22-72-upper-fin-rear-attachment-points/important-cases","documents":"/api/acts/ad-gaf-n22-72-upper-fin-rear-attachment-points/documents"}}