{"id":"F2006B07000","name":"AD/SF340/70 - Fuselage Insulation Pads at Wing Aft Area","slug":"ad-sf340-70-fuselage-insulation-pads-at-wing-aft-area","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48624,"registerId":"commonwealth-F2006B07000-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SF340/70 - Fuselage Insulation Pads at Wing Aft Area","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/SF340/70 Fuselage Insulation Pads at Wing Aft Area 7/99\n\nApplicability: Model SF340A, serial numbers SF340A-004 through -159, and Model 340B, serial numbers 340B-160 through -459.\n\n \n\nRequirement: Action in accordance with SAAB Aircraft AB Mandatory Service Bulletin 340-53- 061.\n\n \n\nNote: LFV AD 1-141 refers.\n\n \n\nCompliance: Unless already accomplished, before 31 December 1999.\n\n \n\nThis Airworthiness Directive becomes effective on 15 July 1999.\n\n \n\nBackground: The manufacturer has determined that insulation pads in the lower side of the fuselage at the wing aft area may come loose, cause interference with the aileron control cable segment and consequent unacceptably high control forces.\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 addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating a single safety fix."},"complexity_factors":["Single, specific technical requirement referencing an external manufacturer bulletin","Narrow applicability limited to specific aircraft models and serial number ranges","Simple compliance deadline structure (single fixed date)","No nested exceptions, conditional logic, or alternative compliance methods","Minimal defined terms (only standard aviation terminology)","Short document length (approximately 150 words of substantive content)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific SAAB aircraft.\n\n**What it does:** It requires owners and operators of certain SAAB SF340A and 340B aeroplanes to inspect and fix a specific safety problem. The issue involves insulation pads (sound/heat insulating material) inside the fuselage near the rear of the wings that can come loose. If these pads detach, they can snag on the aileron control cables (the wires that move the wing flaps that steer the plane), making the controls unexpectedly stiff or hard to move.\n\n**Who it affects:** Anyone operating SAAB SF340A aircraft with serial numbers 004 through 159, or SAAB 340B aircraft with serial numbers 160 through 459.\n\n**What must be done:** Operators must follow the manufacturer's official repair instructions (SAAB Aircraft AB Mandatory Service Bulletin 340-53-061) to fix this problem. The deadline for compliance was 31 December 1999.\n\n**Why it matters:** Loose insulation interfering with flight controls is a serious safety risk. This directive prevents potential loss of control during flight by ensuring the insulation is properly secured before it can cause problems."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD’s scope is confined to specified SF340A and 340B serial numbers and requires action per SAAB Service Bulletin 340‑53‑061 (Applicability; Requirement). The text sets a single compliance deadline and cites the safety defect (Background); it does not expand or alter that scope."},"complexity_factors":["Narrow technical focus limited to specific models and serial numbers (Applicability)","Mandated adherence to an OEM Mandatory Service Bulletin rather than prescribing detailed actions in the AD text itself (Requirement)","Safety‑critical mechanical interference with flight controls creates low tolerance for error and may require immediate corrective work (Background)","Fixed compliance deadline and effective date create scheduling pressure for operators (Compliance)","Regulatory origin under CASA/Part 39 means non‑compliance is enforceable by the regulator (header; Compliance)","Cross‑reference to a foreign authority AD (LFV AD 1‑141) may require operators to check additional material (Note)"],"plain_english_summary":"Requires operators of certain SAAB SF340A and 340B aeroplanes (serials SF340A‑004–159; 340B‑160–459) to inspect and repair the lower fuselage insulation pads at the wing aft area in accordance with SAAB Mandatory Service Bulletin 340‑53‑061. (Requirement; Applicability)\n\nThe manufacturer found these pads can come loose and foul an aileron control‑cable segment, creating unacceptably high control forces. Compliance was required by 31 December 1999; the directive took effect 15 July 1999. (Background; Compliance)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-70-fuselage-insulation-pads-at-wing-aft-area","history":"/api/acts/ad-sf340-70-fuselage-insulation-pads-at-wing-aft-area/history","analysis":"/api/acts/ad-sf340-70-fuselage-insulation-pads-at-wing-aft-area/analysis","conflicts":"/api/acts/ad-sf340-70-fuselage-insulation-pads-at-wing-aft-area/conflicts","importantCases":"/api/acts/ad-sf340-70-fuselage-insulation-pads-at-wing-aft-area/important-cases","documents":"/api/acts/ad-sf340-70-fuselage-insulation-pads-at-wing-aft-area/documents"}}