{"id":"F2006B06947","name":"AD/SF340/19 - Ice Protection","slug":"ad-sf340-19-ice-protection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114845,"registerId":"commonwealth-F2006B06947-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SF340/19 - Ice Protection","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)  SAAB SF340 Series Aeroplanes\n\n \n\nAD/SF340/19 Ice Protection 2/91\n\nApplicability: Model SF340A series with S/No’s 340A-004 through 340A-048.\n\n \n\nRequirement: 1. For S/No’s 340A-004 through 340A-048: Action in accordance with the technical requirements of LFV (Swedish) AD 1-004 revision C Part (A).\n\n \n\n2. For S/No’s 340A-004 through 340A-028: Action in accordance with the technical requirements of LFV AD 1-004 revision C Part (B) and (C).\n\n \n\nNote: SAAB SB’s SF340-30-008, SF340-54-002 and SF340-76-006 refer.\n\n \n\nCompliance: Unless already accomplished; before 30 April 1991.\n\n \n\nBackground: This AD is raised in response to revision C of LFV AD 1-004, which reflects Revision 3 of SB SF340-30-008. The SB transfers the service check interval to Maintenance Review Board Report TASK 30-20-00(5).\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on ice protection maintenance for a limited subset of SAAB SF340A aircraft. It has not expanded beyond its original technical purpose."},"complexity_factors":["Very short document (approximately 200 words)","Only 3 defined serial number ranges to identify applicability","Simple conditional structure: all planes do Part A; subset also does Parts B and C","Single cross-reference to Swedish aviation authority directive (LFV AD 1-004)","No nested exceptions or complex definitional sections","Clear, single compliance date with straightforward exception ('unless already accomplished')"],"plain_english_summary":"This CASA Airworthiness Directive mandates specific maintenance and inspections of ice‑protection systems on SAAB SF340A aeroplanes (serials 340A‑004 through 340A‑048). It affects operators and maintenance crews of those aircraft and, for serials 004–028, requires additional actions. The AD aims to prevent hazardous ice buildup that can impair control and moves some checks to the Maintenance Review Board schedule. Work was required to be completed before 30 April 1991."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This AD updates prior requirements by adopting LFV AD 1‑004 revision C (reflecting Saab SB Revision 3) and moves the service‑check interval into the Maintenance Review Board Report TASK 30‑20‑00(5). Mechanically, it modifies maintenance scheduling authority and requires operators to follow the revised LFV/SB instructions for the affected serial numbers."},"complexity_factors":["Cross-reference to foreign AD: requires complying with LFV AD 1‑004 revision C rather than setting new technical detail locally (Requirement 1 & 2).","Split applicability: different serial number ranges have different required parts (S/No 340A‑004–048 vs 340A‑004–028) (Applicability; Requirement).","Multiple referenced documents: relies on Saab Service Bulletins SF340‑30‑008, SF340‑54‑002 and SF340‑76‑006 for technical content (Note).","Operational scheduling change: transfers the service‑check interval to Maintenance Review Board Report TASK 30‑20‑00(5), shifting where timing is prescribed (Background).","Fixed compliance deadline and conditional language: 'Unless already accomplished; before 30 April 1991' creates a binary compliance window for historical recordkeeping (Compliance).","Potential for administrative ambiguity: reader must consult external LFV AD and SB revisions to know exact technical steps and intervals (implicit in Requirement and Note)."],"plain_english_summary":"This airworthiness directive requires operators of Saab SF340A aircraft (S/No 340A‑004 to 340A‑048) to carry out the ice‑protection inspections and corrective actions set out in LFV (Swedish) AD 1‑004 revision C; an additional set of parts (B) and (C) apply to S/No 340A‑004 to 340A‑028. Compliance was required by 30 April 1991. Operators are responsible for implementing the specified service bulletins or the Maintenance Review Board task (TASK 30‑20‑00(5)), which the AD moves some service‑check timing to."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-19-ice-protection","history":"/api/acts/ad-sf340-19-ice-protection/history","analysis":"/api/acts/ad-sf340-19-ice-protection/analysis","conflicts":"/api/acts/ad-sf340-19-ice-protection/conflicts","importantCases":"/api/acts/ad-sf340-19-ice-protection/important-cases","documents":"/api/acts/ad-sf340-19-ice-protection/documents"}}