{"id":"F2006B10059","name":"AD/G159/15 - Nose Landing Gear Uplock Bellcrank - Inspection","slug":"ad-g159-15-nose-landing-gear-uplock-bellcrank-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55504,"registerId":"commonwealth-F2006B10059-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G159/15 - Nose Landing Gear Uplock Bellcrank - Inspection","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 ORDERS CIVIL AVIATION SAFETY AUTHORITY                            PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  GULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES\n\n \n\nAD/G159/15 Nose Landing Gear Uplock Bellcrank - Inspection 10/71\n\nApplicability: All models.\n\n \n\nDocument: Grumman Customer Bulletin No. 211.\n\n \n\nCompliance: Within 100 hours time in service after 29 October 1971.\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":1,"scope_assessment":{"changed":false,"description":"This is a discrete, time-limited safety directive from 1971. It has not expanded beyond its original narrow purpose of mandating a specific inspection on a specific aircraft component."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section","No cross-references to other legislation","Simple, unconditional directive: one action, one deadline, one aircraft type","Single external reference (Grumman Customer Bulletin No. 211) with no nested conditions","No exceptions, exemptions, or alternative compliance methods stated"],"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). Think of it as a \"recall notice\" for aircraft, but legally binding.\n\n**What it requires:** Owners and operators of **Gulfstream G.159 series aeroplanes** (originally built by Grumman) must inspect the **nose landing gear uplock bellcrank** — a mechanical lever that helps lock the front wheel in place when retracted. The inspection must follow instructions in **Grumman Customer Bulletin No. 211**.\n\n**Who must comply:** Anyone operating any model of the Gulfstream G.159 aircraft.\n\n**When:** The inspection had to be completed within **100 hours of flight time** after **29 October 1971**.\n\n**Why it matters:** Faulty landing gear uplock mechanisms can cause the nose gear to collapse or fail to deploy properly — a serious safety risk during takeoff and landing. This AD ensures a known defect gets checked before it causes an accident."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied text sets an initial, time-limited inspection requirement applying to all G.159 models and references a manufacturer bulletin for technical steps. The document contains no language indicating an amendment or change to a prior directive, so there is no indication in the supplied text that the scope has been changed from an earlier instrument."},"complexity_factors":["Short, specific compliance window measured in aircraft hours (100 hours after a fixed date) requires accurate hours tracking and scheduling.","The AD delegates all technical inspection steps to an external manufacturer document (Grumman Customer Bulletin No. 211), so the directive itself lacks procedural detail.","Applicability to \"All models\" simplifies coverage but may require operators of different subvariants to verify bulletin applicability and parts compatibility.","The AD does not specify follow-up intervals or explicit corrective actions; those matters depend on the manufacturer bulletin and maintenance judgement.","Enforcement and proof of compliance require record-keeping and potentially regulatory interaction, adding administrative steps."],"plain_english_summary":"This directive requires owners/operators of all Gulfstream (Grumman) G.159 aeroplanes to complete a one‑off inspection of the nose‑landing‑gear uplock bellcrank per Grumman Customer Bulletin No. 211. The inspection must be done within 100 hours time‑in‑service after 29 October 1971. Compliance is mandatory, imposes inspection/repair costs and scheduling obligations on operators and their maintenance organisations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g159-15-nose-landing-gear-uplock-bellcrank-inspection","history":"/api/acts/ad-g159-15-nose-landing-gear-uplock-bellcrank-inspection/history","analysis":"/api/acts/ad-g159-15-nose-landing-gear-uplock-bellcrank-inspection/analysis","conflicts":"/api/acts/ad-g159-15-nose-landing-gear-uplock-bellcrank-inspection/conflicts","importantCases":"/api/acts/ad-g159-15-nose-landing-gear-uplock-bellcrank-inspection/important-cases","documents":"/api/acts/ad-g159-15-nose-landing-gear-uplock-bellcrank-inspection/documents"}}