{"id":"F2006B10200","name":"AD/GAF-N22/52 - Stub Wing Upper Front Spar Cap","slug":"ad-gaf-n22-52-stub-wing-upper-front-spar-cap","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55858,"registerId":"commonwealth-F2006B10200-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAF-N22/52 - Stub Wing Upper Front Spar Cap","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nGAF N22 and N24 Series Aeroplanes\n\nAD/GAF-N22/52 Stub Wing Upper Front Spar Cap 1/87\n\nApplicability: All models.\n\nRequirement: Action in accordance with Nomad Service Bulletin NMD-53-6.\n\nNote: Because of particular difficulties associated with fastener removal and the critical nature of the operation, it is recommended that operators consider the manufacturer’s offer of specialist personnel and equipment, as outlined in Nomad Product Support Information Letter No. IL86-07.\n\nCompliance: As detailed in the Requirement Document.\n\nBackground: The results of full scale fatigue tests being conducted by the manufacturer have shown the need for inspection of critical fastener holes in the stub wing upper front spar cap, near the wing strut attachment. Selected lead time aircraft which have been inspected, both in Australia and overseas, have not exhibited any cracks to date.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2119},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific structural fatigue issue identified in manufacturer testing. It maintains its original scope as a mandatory inspection requirement for critical fastener holes on specific aircraft models."},"complexity_factors":["Relies entirely on external technical document (Service Bulletin NMD-53-6) for procedural details","Uses specialized aeronautical engineering terminology (spar cap, fastener holes, stub wing)","References additional manufacturer guidance (Product Support Information Letter No. IL86-07) without reproducing contents"],"plain_english_summary":"**What this does**\n\nThis directive orders owners and operators of GAF N22 and N24 Nomad aeroplanes to inspect a specific structural part of the aircraft wing — the **stub wing upper front spar cap** (the reinforced beam where the wing support strut attaches) — for cracks around the bolt holes.\n\n**Who it affects**\n\n* Owners and operators of all models of GAF N22 and N24 series aircraft.\n\n**What must be done**\n\n* Carry out inspections and any necessary repairs exactly as described in **Nomad Service Bulletin NMD-53-6**.\n* Because removing the fasteners is technically difficult and safety-critical, operators are advised to consider hiring the manufacturer's specialist personnel and equipment.\n\n**Why this matters**\n\nFatigue testing revealed that the bolt holes in this wing component could develop cracks over time. While aircraft inspected so far haven't shown cracks, this directive ensures potential structural failures are identified before they compromise flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gaf-n22-52-stub-wing-upper-front-spar-cap","history":"/api/acts/ad-gaf-n22-52-stub-wing-upper-front-spar-cap/history","analysis":"/api/acts/ad-gaf-n22-52-stub-wing-upper-front-spar-cap/analysis","conflicts":"/api/acts/ad-gaf-n22-52-stub-wing-upper-front-spar-cap/conflicts","importantCases":"/api/acts/ad-gaf-n22-52-stub-wing-upper-front-spar-cap/important-cases","documents":"/api/acts/ad-gaf-n22-52-stub-wing-upper-front-spar-cap/documents"}}