{"id":"F2006B10087","name":"AD/G159/43 Amdt 1 - Fluorescent Lighting Installations Incorporating Series 66 Lamps","slug":"ad-g159-43-amdt-1-fluorescent-lighting-installations-incorporating-series-66-lamps","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55557,"registerId":"commonwealth-F2006B10087-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G159/43 Amdt 1 - Fluorescent Lighting Installations Incorporating Series 66 Lamps","content":"COMMONWEALTH OF AUSTRALIA CIVIL AVIATION ORDERS CIVIL AVIATION SAFETY AUTHORITY PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nGULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES\n\nAD/G159/43\n\nAmdt 1\n\n  \n\nFluorescent Lighting Installations Incorporating Series “66” Lamps\n\n  \n4/90\n\nApplicability: All Gulfstream I aircraft.\n\nRequirement: Action in accordance with Gulfstream Aerospace Customer Bulletin No. 333.\n\nRequired actions 1, 2, 3 and 4.1 only.\n\nNote: Aerospace Lighting Corp Information Bulletin 89-001 also refers.\n\nCompliance: Prior to 30 December 1989.\n\nBackground: Gulfstream have advised of an inflight fire in the area of the installed fluorescent lighting. Although the exact cause of the fire is unknown, likely causes and precautionary actions are detailed in the requirement document.\n\nAmendment 1 to this AD is issued to clarify the required actions following requests from operators.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical safety directive focused on a specific aircraft type and a specific maintenance issue. The amendment merely clarifies which specific actions from the referenced manufacturer bulletin are required; it does not expand the scope beyond the original safety concern regarding fluorescent lighting fire risks."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term implicitly referenced (\"Series 66\" lamps)","Single, clear applicability criterion (All Gulfstream I aircraft)","Simple conditional structure: one requirement with explicit exclusion (actions 1, 2, 3 and 4.1 only)","No cross-references to other legislation or complex regulatory frameworks beyond the referenced Gulfstream bulletin","Clear, fixed compliance date with no alternative compliance methods or exceptions"],"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 I aircraft** (also known as Grumman G.159 series) to take specific safety actions regarding their **fluorescent lighting systems** that use \"Series 66\" lamps.\n\n**Why it matters:**\nThere was an **inflight fire** on a Gulfstream I aircraft in the area where these fluorescent lights are installed. While investigators couldn't pinpoint the exact cause, Gulfstream identified likely causes and issued safety instructions. This AD makes those instructions **legally mandatory** for all Australian-registered Gulfstream I planes.\n\n**What must be done:**\nOperators must follow **Gulfstream Aerospace Customer Bulletin No. 333**, specifically:\n- Actions 1, 2, 3, and 4.1 (but not 4.2 or any other actions in that bulletin)\n\n**Deadline:**\nThe work had to be completed **before 30 December 1989**.\n\n**The amendment (Amendment 1):**\nThis updated version was issued to make clearer exactly which actions from the Gulfstream bulletin were required, after aircraft operators asked for clarification.\n\n**Who it affects:**\nAnyone operating a Gulfstream I aircraft in Australia — typically charter companies, corporate flight departments, or private owners."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 clarifies the required actions after requests from operators but does not expand the applicability or add additional required items beyond those listed (actions 1, 2, 3 and 4.1). The AD continues to apply only to all Gulfstream I aircraft and retains the same compliance deadline. (See: \"Amendment 1\", \"Applicability\", \"Requirement\", \"Compliance\")"},"complexity_factors":["Short, narrowly targeted directive applying to a single aircraft type (Gulfstream I)","Relies on external technical documents (Gulfstream Customer Bulletin No. 333; Aerospace Lighting Corp Information Bulletin 89-001) rather than containing detailed technical steps within the AD itself","Specifies only a subset of bulletin items (actions 1, 2, 3 and 4.1), requiring cross-referencing","Contains a firm compliance deadline (adds time-pressure and logistical planning for operators)","Underlying cause stated as unknown, creating uncertainty about completeness of prescribed measures"],"plain_english_summary":"This AD orders all Gulfstream (Grumman) G.159 (Gulfstream I) operators to carry out specified corrective actions on Series “66” fluorescent lighting by completing actions 1, 2, 3 and 4.1 of Gulfstream Customer Bulletin No. 333 (with related lighting manufacturer guidance) to address an inflight fire risk. It applied to the entire Gulfstream I fleet, required completion before 30 December 1989, and places compliance costs on aircraft owners/operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g159-43-amdt-1-fluorescent-lighting-installations-incorporating-series-66-lamps","history":"/api/acts/ad-g159-43-amdt-1-fluorescent-lighting-installations-incorporating-series-66-lamps/history","analysis":"/api/acts/ad-g159-43-amdt-1-fluorescent-lighting-installations-incorporating-series-66-lamps/analysis","conflicts":"/api/acts/ad-g159-43-amdt-1-fluorescent-lighting-installations-incorporating-series-66-lamps/conflicts","importantCases":"/api/acts/ad-g159-43-amdt-1-fluorescent-lighting-installations-incorporating-series-66-lamps/important-cases","documents":"/api/acts/ad-g159-43-amdt-1-fluorescent-lighting-installations-incorporating-series-66-lamps/documents"}}