{"id":"F2006B06973","name":"AD/SF340/44 - Propeller Brake Valve","slug":"ad-sf340-44-propeller-brake-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114888,"registerId":"commonwealth-F2006B06973-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SF340/44 - Propeller Brake Valve","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)  \nSAAB SF340 Series Aeroplanes\n\nAD/SF340/44 Propeller Brake Valve 10/94\n\nApplicability: All SF 340A S/N 004 through 159 and SF 340B S/N 160 and subsequent that are fitted with an operational propeller brake system.\n\nRequirement: Action in accordance with SAAB Service Bulletin 340-61-032.\n\nNote: Swedish (SFD) SAD No 1-064 dated 1 July 1994.\n\nCompliance: Within 100 hours time in service from 15 September 1994. Thereafter, reinspect at intervals not exceeding 100 hours time in service until the requirements of SAAB Service Bulletin 340-61-033 have been incorporated.\n\nBackground: The manufacturer has advised that application of the propeller brake may not prevent the propeller from turning if the hydraulic pump is turned off unless the requirement of SAAB Service Bulletin 340-61-033 has been incorporated.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1709},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: addressing a specific mechanical defect in the propeller brake valve of particular SAAB aircraft models. There is no expansion into broader operational requirements or unrelated systems."},"complexity_factors":["Dependency on external technical documents (SAAB Service Bulletins 340-61-032 and 340-61-033) for actual implementation steps","Specific serial number ranges limiting applicability","Dual-phase compliance structure (interim recurring inspections until permanent modification)"],"plain_english_summary":"This directive requires operators of SAAB SF340A (s/n 004–159) and SF340B (s/n 160 onward) equipped with an operational propeller brake to inspect and maintain the propeller brake valve per SAAB Service Bulletin 340‑61‑032. Inspections must occur within 100 flight hours and repeat every 100 hours until the aircraft is modified per SB 340‑61‑033. It prevents unintended propeller rotation when the hydraulic pump is off, reducing ground and emergency safety risks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-44-propeller-brake-valve","history":"/api/acts/ad-sf340-44-propeller-brake-valve/history","analysis":"/api/acts/ad-sf340-44-propeller-brake-valve/analysis","conflicts":"/api/acts/ad-sf340-44-propeller-brake-valve/conflicts","importantCases":"/api/acts/ad-sf340-44-propeller-brake-valve/important-cases","documents":"/api/acts/ad-sf340-44-propeller-brake-valve/documents"}}