{"id":"F2006B10081","name":"AD/G159/38 - Control Column Wheel Attaching Shaft - Inspection","slug":"ad-g159-38-control-column-wheel-attaching-shaft-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55538,"registerId":"commonwealth-F2006B10081-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G159/38 - Control Column Wheel Attaching Shaft - 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/G159/38 Control Column Wheel Attaching Shaft - Inspection 7/80\n\nApplicability: All models G159.\n\n \n\nDocument: Gulfstream American Customer Bulletin No. 312. Compliance:  Within 100 hours time in service after 31 July 1980.\n\nBackground: A pilot’s control wheel separated from the control column during a landing approach in a model G1159 aeroplane which has a similar control column assembly.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive issued in 1980. It has not grown beyond its original narrow purpose of addressing a specific mechanical inspection requirement for one aircraft type. Airworthiness directives are inherently limited in scope by design — they address specific safety defects in specific aircraft models."},"complexity_factors":["Extremely short document — approximately 150 words total","Only 1 defined term implicitly used ('time in service' — standard aviation term for flight hours)","No cross-references to other legislation or regulations","Single, unambiguous compliance requirement with clear deadline","No conditional logic, exceptions, or alternative compliance paths","Straightforward applicability statement ('All models G159') with no exclusions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders owners and operators of **Gulfstream G.159 series aeroplanes** to inspect the **control column wheel attaching shaft** — the mechanical part that connects the pilot's steering wheel (control yoke) to the aircraft's control column.\n\n**Why it matters:**\nA pilot's control wheel had previously separated from the control column during landing approach in a similar aircraft model (G1159). This created an immediate flight safety risk — imagine your steering wheel coming off while driving, but at 3,000 feet. The directive prevents the same failure from happening in the G.159 fleet.\n\n**Who must comply:**\nAnyone operating any model of the Gulfstream G.159 aircraft.\n\n**What must be done:**\n- Follow the inspection procedure in **Gulfstream American Customer Bulletin No. 312**\n- Complete the inspection **within 100 hours of flight time** after 31 July 1980\n\n**Bottom line:** This is a reactive safety fix — a specific mechanical inspection forced by a near-disaster in a similar aircraft, designed to catch a dangerous structural failure before it causes an accident."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope—requiring inspection of the control column wheel attaching shaft on all G.159 models in response to a similar failure on a related model—is consistent with the stated purpose in the Background. The AD applies to the same fleet described (all G.159 models) and prescribes a single remedial action and timeframe, so there is no indication in the instrument text that the scope departs from its original stated intent (Applicability; Background; Compliance)."},"complexity_factors":["Narrow technical subject (control column wheel attaching shaft) limiting regulatory scope (Applicability).","Single mandated action (inspection) with a single deadline (Compliance).","Dependency on an external technical document for inspection procedure (Gulfstream Bulletin No. 312) increases procedural reliance on the manufacturer (Document).","Lack of procedural detail within the AD itself — AD delegates technical steps to the referenced bulletin (Document).","Short, fixed compliance window creates scheduling pressure for operators (Compliance)."],"plain_english_summary":"This AD mandates a one-time inspection of the control column wheel attaching shaft on all Gulfstream (Grumman) G.159 aircraft, carried out per Gulfstream American Customer Bulletin No. 312 within 100 hours TIS after 31 July 1980. It applies to aircraft owners/operators, who must arrange and fund the inspection and any repairs. The directive responds to a control‑wheel separation incident on a related model to mitigate the same safety risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g159-38-control-column-wheel-attaching-shaft-inspection","history":"/api/acts/ad-g159-38-control-column-wheel-attaching-shaft-inspection/history","analysis":"/api/acts/ad-g159-38-control-column-wheel-attaching-shaft-inspection/analysis","conflicts":"/api/acts/ad-g159-38-control-column-wheel-attaching-shaft-inspection/conflicts","importantCases":"/api/acts/ad-g159-38-control-column-wheel-attaching-shaft-inspection/important-cases","documents":"/api/acts/ad-g159-38-control-column-wheel-attaching-shaft-inspection/documents"}}