{"id":"F2006B10894","name":"AD/JETSTREAM/26 - Propeller Governor Low Speed Setting From 94% to 96%","slug":"ad-jetstream-26-propeller-governor-low-speed-setting-from-94-to-96","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56429,"registerId":"commonwealth-F2006B10894-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/26 - Propeller Governor Low Speed Setting From 94% to 96%","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 Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  British Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\n \n\n# AD/JETSTREAM/26 Propeller Governor Low Speed\n\nSetting From 94% to 96%\n\nApplicability: All Jetstream 3100 series aircraft.\n\n \n\nRequirement: Action in accordance with BAe ASB No 76-A-JA 880442 Rev 1.\n\n \n\nNote: FAA AD 88-13-02 refers.\n\n# 10/88 DM\n\n \n\nCompliance: 1. Unless already accomplished within 50 hours TIS or by 22 August 1988 whichever occurs first.\n\n \n\n2. Prior to first flight after installation of an engine or propeller governor.\n\n \n\nBackground:  During a recent overseas accident investigation the pilot noted dual torque oscillation prior to the accident. To ensure take-off power is available this Directive requires operators to check that the governor low speed stop is correctly set between 95.5 and\n\n96.0 percent.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The directive raises the required propeller governor low‑speed stop from the prior 94% to a mandated range of 95.5–96.0%, extending a mandatory adjustment/inspection obligation to all Jetstream 3100 series aircraft with specific time and event triggers (50 hours TIS or before first flight after installation). Compliance actions must follow BAe ASB No 76‑A‑JA 880442 Rev 1."},"complexity_factors":["Safety‑critical technical specification requiring precise setting (95.5–96.0%)","Short, hard compliance timeframe (50 hours TIS or fixed calendar date)","Multiple compliance triggers (initial 50‑hour window and before first flight after engine/propeller/governor installation)","Dependence on an external document for procedural detail (BAe ASB No 76‑A‑JA 880442 Rev 1)","Cross‑reference to FAA AD for background, implying international coordination","Applies fleet‑wide to all Jetstream 3100 series (broad operational impact)","Operational costs and scheduling impact fall on operators/maintenance providers"],"plain_english_summary":"This airworthiness directive requires Jetstream 3100 operators to set or verify the propeller governor low‑speed stop at 95.5–96.0% (raised from 94%) to ensure take‑off power after reported torque oscillations. The Civil Aviation Safety Authority mandates inspection/adjustment per BAe ASB No 76‑A‑JA 880442 Rev 1; operators/maintenance providers must comply within 50 hours time‑in‑service or by 22 Aug 1988, and before first flight after installing an engine or governor. Operators bear the maintenance cost and scheduling burden."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific technical issue with a specific aircraft series. The scope remains exactly as intended: a mandatory fix for propeller governor settings on Jetstream 3100 aircraft following an accident investigation."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined compliance triggers (50 hours TIS or date deadline)","Single technical requirement referencing an external standard (BAe ASB)","No nested exceptions or conditional logic","Minimal cross-referencing (one FAA AD mentioned in passing, one service bulletin)","Clear, direct language throughout"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of British Aerospace Jetstream 3100 aircraft to raise the propeller governor low‑speed setting from 94% to 95.5–96% to prevent dual torque oscillation that can prevent full take‑off power. It’s mandatory, must follow BA Alert SB No. 76‑A‑JA 880442 Rev 1, and be done within 50 flight hours or by 22 August 1988 (whichever comes first) — and before first flight after installing a new engine or governor."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-26-propeller-governor-low-speed-setting-from-94-to-96","history":"/api/acts/ad-jetstream-26-propeller-governor-low-speed-setting-from-94-to-96/history","analysis":"/api/acts/ad-jetstream-26-propeller-governor-low-speed-setting-from-94-to-96/analysis","conflicts":"/api/acts/ad-jetstream-26-propeller-governor-low-speed-setting-from-94-to-96/conflicts","importantCases":"/api/acts/ad-jetstream-26-propeller-governor-low-speed-setting-from-94-to-96/important-cases","documents":"/api/acts/ad-jetstream-26-propeller-governor-low-speed-setting-from-94-to-96/documents"}}