{"id":"F2006B10036","name":"AD/G1159/33 Amdt 2 - Engine Fire Extinguisher System","slug":"ad-g1159-33-amdt-2-engine-fire-extinguisher-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55447,"registerId":"commonwealth-F2006B10036-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G1159/33 Amdt 2 - Engine Fire Extinguisher System","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)  \nGulfstream (Grumman) G1159 and G-IV Series Aeroplanes\n\nAD/G1159/33\n\nAmdt 2\n\n  \nEngine Fire Extinguisher System 9/93\n\nApplicability: All Model G1159 (G-II), G1159A (G-III) and G1159B (G-IIB) and G-IV aircraft.\n\nRequirement: 1. Inspect the engine fire extinguisher system electrical power leads for the correct configuration in accordance with the following Gulfstream Alert Customer Bulletins:\n\nG1159 and G1159B \\- G-II Bulletin No 2 dated 2 February 1989 G1159A - G-III Bulletin No 4 dated 2 February 1989\n\nG-IV \\- G-IV Bulletin No 5 dated 2 February 1989\n\n2. Modify the electrical leads and plumbing connections to the engine fire extinguishers in accordance with the following Gulfstream Aircraft Service Changes:\n\nG1159 and G1159B \\- Gulfstream II/IIB Change 401 dated 6 December 1991 G1159A - Gulfstream III Change 195 dated 6 December 1991\n\nG-IV \\- Gulfstream G-IV Change 146 dated 5 September 1991\n\nNote: FAA AD 93-10-04 Amdt 39-8582 refers.\n\nCompliance: The Compliance for the previous issue of this Directive was “Before next flight after 14 April 1989 following any maintenance action which could result in cross connection or misconnection of any fire extinguisher system wiring”.\n\nThe Compliance for this issue is:\n\nRequirement 1 \\- Before the next flight, immediately following any maintenance action which could result in cross connection or misconnection of any fire extinguisher system wiring.\n\nRequirement 2 \\- Prior to 19 August 1995.\n\nNote: Requirement 2 is considered terminating action for the repetitive inspections required by this Directive.\n\nBackground: Compliance with this Directive will prevent fire extinguisher bottles being discharged into the incorrect nacelle. Amendment 1 to this Directive was issued following further information from the FAA, and amends the compliance period providing follow-up checks following system maintenance.\n\nAmendment 2 is issued following the release of a superseding FAA AD, this amendment provides terminating action for the Directive. The compliance time required by the FAA is extended by two months.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is Amendment 2 of an existing directive. The amendments have remained within the original scope of fixing the engine fire extinguisher wiring configuration. Amendment 1 adjusted compliance timing; Amendment 2 adds terminating action (the permanent modification). The scope has not expanded beyond the original safety purpose."},"complexity_factors":["Short, single-purpose directive with only 2 substantive requirements","Minimal defined terms (relies on external Gulfstream technical documents)","Simple conditional logic: Requirement 1 triggers on specific maintenance events; Requirement 2 has a fixed deadline","Cross-references to 6 external technical documents (Gulfstream bulletins and service changes) plus one FAA AD, but these are listed rather than incorporated by complex statutory reference","Clear terminating action (Requirement 2 ends the need for Requirement 1)","No nested exceptions or complex compliance calculations"],"plain_english_summary":"This CASA Airworthiness Directive mandates immediate inspections after any maintenance that might have swapped wiring, and a required permanent wiring/plumbing modification (by 19 August 1995) for Gulfstream G‑II, G‑III, G‑IIB and G‑IV jets. It fixes a cross‑wired engine fire‑extinguisher system that could discharge the extinguisher into the wrong engine, risking an unresolved in‑flight fire. Affects owners, operators and maintenance engineers; references Gulfstream service bulletins and the FAA action."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 2 changed scope by introducing a terminating action: completing the modification specified in Requirement 2 extinguishes the prior repetitive inspection obligation. The amendment also extends the FAA compliance time by two months. Requirement 1 (immediate inspection after maintenance that could cause misconnection) remains in force while the retrofit deadline applies."},"complexity_factors":["Model‑specific applicability (G1159, G1159A, G1159B, G‑IV) requiring targeted fleet action","Dependence on multiple manufacturer documents (Gulfstream bulletins and service changes) to define corrective work","Two distinct compliance triggers: immediate inspections after certain maintenance (Requirement 1) and a one‑off retrofit by a calendar date (Requirement 2)","Technical nature of work (electrical leads and plumbing) requiring qualified maintenance personnel","Terminating action interplay: modification ends repetitive inspections, requiring recordkeeping and verification","Cross‑reference to FAA AD for background and timing adjustments"],"plain_english_summary":"This airworthiness directive requires inspection of engine fire-extinguisher electrical power leads after any maintenance that could cause a cross‑connection (Requirement 1), and mandates modification of the electrical leads and extinguisher plumbing according to Gulfstream service changes by 19 August 1995 (Requirement 2). It applies to Gulfstream G1159/G1159A/G1159B and G‑IV aeroplanes. Aircraft owners/operators pay for inspections and the mandated modifications; inspections must be done immediately after qualifying maintenance and completing the modification stops the need for repeated checks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-33-amdt-2-engine-fire-extinguisher-system","history":"/api/acts/ad-g1159-33-amdt-2-engine-fire-extinguisher-system/history","analysis":"/api/acts/ad-g1159-33-amdt-2-engine-fire-extinguisher-system/analysis","conflicts":"/api/acts/ad-g1159-33-amdt-2-engine-fire-extinguisher-system/conflicts","importantCases":"/api/acts/ad-g1159-33-amdt-2-engine-fire-extinguisher-system/important-cases","documents":"/api/acts/ad-g1159-33-amdt-2-engine-fire-extinguisher-system/documents"}}