{"id":"F2006B06986","name":"AD/SF340/58 Amdt 1 - Windshield Wiper Arm","slug":"ad-sf340-58-amdt-1-windshield-wiper-arm","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114912,"registerId":"commonwealth-F2006B06986-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SF340/58 Amdt 1 - Windshield Wiper Arm","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/SF340/58\n\nAmdt 1\n\n  \nWindshield Wiper Arm 4/98\n\nApplicability: Model SF340A with serial numbers SF340A-004 through \\-159.\n\nModel 340B with serial numbers 340B-160 through \\-399.\n\nRequirement: Action in accordance with SAAB Service Bulletin 340-30-081.\n\nNote: LFV AD 1-115R1 refers.\n\nCompliance: For all aircraft that have exceeded 4000 flight hours: Unless already accomplished, before 26 June 1998.\n\nNote: A repetitive inspection is planned to be incorporated in the MRB or the AMM.\n\nThis amendment becomes effective on 26 March 1998.\n\nBackground: A windshield wiper blade separated from the wiper arm while the wiper system was operating in flight. An investigation revealed that the wiper blade and arm tip separated from the wiper arm at the rivet attachment point. The incident resulted in propeller damage and penetration of the left side fuselage skin.\n\nAmendment 1 is issued in response to a revision of the related LFV AD which introduces a new requirement document, which affects another type of wiper arm assembly.\n\nThe original issue of this airworthiness directive became effective on 14 August 1997.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: preventing windshield wiper arm failures on SAAB SF340 aircraft. The amendment simply expands the affected parts to include an additional wiper arm assembly type in response to updated Swedish regulatory guidance. The scope has not grown beyond the specific safety issue (wiper arm structural failure) that prompted the original directive."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (serial number ranges)","Single requirement referencing an external technical document (SAAB Service Bulletin)","Simple compliance condition (flight hours threshold + deadline)","No nested exceptions or conditional logic","Minimal cross-referencing (one note to Swedish LFV AD, one planned future reference to MRB/AMM)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of certain SAAB SF340 turboprops to inspect and repair windshield wiper arms per SAAB Service Bulletin 340-30-081 after an in‑flight wiper blade failure that damaged a propeller and perforated the fuselage. It applies to specified SF340A/B serial ranges for aircraft with over 4,000 hours, with compliance required before 26 June 1998. Amendment 1 aligns the AD with the Swedish authority’s update adding a requirement for an alternative wiper arm assembly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"Amendment 1 adjusts the AD to align with a revised LFV AD that introduces a new requirement document affecting another type of wiper‑arm assembly. The AD still targets the listed SF340 serial ranges but the amendment broadens the procedural source and may extend the types of wiper‑arm assemblies captured by the mandatory actions."},"complexity_factors":["Narrow applicability limited to specific SF340A and 340B serial number ranges","Single mandatory action references an external service bulletin (SAAB SB 340‑30‑081)","Fixed compliance threshold tied to aircraft exceeding 4,000 flight hours and a hard deadline (26 June 1998)","Cross-reference to a foreign authority directive (LFV AD) and amendment to align requirement documents","Note that a repetitive inspection will be incorporated into MRB/AMM later (implementation deferred)"],"plain_english_summary":"This directive mandates that operators of specified SAAB SF340A and 340B aeroplanes carry out the inspection and corrective actions set out in SAAB Service Bulletin 340‑30‑081 for the windshield wiper arm. It was issued after a wiper blade separated in flight, causing propeller and fuselage damage; aircraft with over 4,000 flight hours must comply before 26 June 1998. Amendment 1 aligns the directive with a revised LFV AD that introduces an additional wiper‑arm requirement document."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-58-amdt-1-windshield-wiper-arm","history":"/api/acts/ad-sf340-58-amdt-1-windshield-wiper-arm/history","analysis":"/api/acts/ad-sf340-58-amdt-1-windshield-wiper-arm/analysis","conflicts":"/api/acts/ad-sf340-58-amdt-1-windshield-wiper-arm/conflicts","importantCases":"/api/acts/ad-sf340-58-amdt-1-windshield-wiper-arm/important-cases","documents":"/api/acts/ad-sf340-58-amdt-1-windshield-wiper-arm/documents"}}