{"id":"F2006B10035","name":"AD/G1159/32 - Flap, Auxiliary and Thrust Reverser Hydraulic Shut-Off Valves - Inspection and Replacement","slug":"ad-g1159-32-flap-auxiliary-and-thrust-reverser-hydraulic-shut-off-valves-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55445,"registerId":"commonwealth-F2006B10035-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G1159/32 - Flap, Auxiliary and Thrust Reverser Hydraulic Shut-Off Valves - Inspection and Replacement","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/G1159/32 Flap, Auxiliary and Thrust Reverser Hydraulic Shut-Off Valves \\- Inspection and Replacement\n\n  \n8/84\n\nApplicability: All models and all shut-off valve assemblies Pt. No. 1159SCH211-7 held as spares. Requirement: Gulfstream Aerospace Customer Bulletin No. 349.\n\nCompliance: Before further flight after 17 July 1984 perform step 1 of action required in the Requirement Document complying with steps 1A or 1B as applicable.\n\nWhere step 1C of the Requirement Document is applicable, inspection intervals shall not exceed 7 days.\n\nBackground: The manufacturer advises that all combined and auxiliary hydraulic system functions could be lost should the brazing of the solenoids fitted to the shut-off valves fail due to fatigue.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1424},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope—a targeted safety intervention addressing a specific engineering defect (solenoid brazing fatigue) in specific aircraft components. The applicability remains limited to Gulfstream G1159/G-IV series valves with the identified part number, consistent with the original safety concern."},"complexity_factors":["Conditional compliance paths requiring reference to external technical document (Steps 1A, 1B, or 1C in Customer Bulletin No. 349) without reproducing those steps in the directive itself","Specific part number targeting (1159SCH211-7) requiring technical cross-referencing against spare parts inventories","Dual applicability trigger (installed aircraft components and spare parts held in stock)","Time-sensitive compliance with calendar-based recurring inspection requirement (7-day intervals) for specific conditional scenarios"],"plain_english_summary":"This mandatory Airworthiness Directive orders owners/operators of Gulfstream G1159 and G‑IV jets (and holders of spare shut‑off valve P/N 1159SCH211‑7) to urgently inspect or replace listed hydraulic shut‑off valves. Required actions include completing the manufacturer’s Step 1 before flight after 17 July 1984 and repeating inspections every 7 days when Step 1C applies. It addresses cracked brazing in solenoids that can cause loss of combined/auxiliary hydraulics—flaps, auxiliary systems, and thrust reversers—risking safe landing and ground handling."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-32-flap-auxiliary-and-thrust-reverser-hydraulic-shut-off-valves-inspection-and-replacement","history":"/api/acts/ad-g1159-32-flap-auxiliary-and-thrust-reverser-hydraulic-shut-off-valves-inspection-and-replacement/history","analysis":"/api/acts/ad-g1159-32-flap-auxiliary-and-thrust-reverser-hydraulic-shut-off-valves-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-g1159-32-flap-auxiliary-and-thrust-reverser-hydraulic-shut-off-valves-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-g1159-32-flap-auxiliary-and-thrust-reverser-hydraulic-shut-off-valves-inspection-and-replacement/important-cases","documents":"/api/acts/ad-g1159-32-flap-auxiliary-and-thrust-reverser-hydraulic-shut-off-valves-inspection-and-replacement/documents"}}