{"id":"F2006B07006","name":"AD/SF340/76 - Aft Attachment Lug of Flap Fittings at WS 123.38","slug":"ad-sf340-76-aft-attachment-lug-of-flap-fittings-at-ws-123-38","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48641,"registerId":"commonwealth-F2006B07006-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/SF340/76 Aft Attachment Lug of Flap F","sectionType":"part","heading":"AD/SF340/76 Aft Attachment Lug of Flap Fittings at WS 123.38 3/2000","content":"# AD/SF340/76 Aft Attachment Lug of Flap Fittings at WS 123.38 3/2000\n\nApplicability: Model SF340A aircraft, serial numbers 004 through 159, and Model 340B aircraft, serial numbers 160 through 459; with flap assemblies 7257800-501 through \\-508, and\n\n\\-851 through \\-856 installed.\n\nRequirement: Action in accordance with SAAB Aircraft Mandatory Service Bulletin 340-57-037, dated 18 January 2000.\n\nIncorporation of Service Bulletin 340-57-038 is considered terminating action for the inspection requirements of this Directive.\n\nNote 1: LFV AD 1-153 refers.\n\nCompliance: Visual inspection to be accomplished within 800 hours time in service after 23 March 2000. Thereafter at intervals not to exceed 800 hours time in service until the NDT inspection is accomplished.\n\nNDT inspection to be accomplished within 6000 flight cycles after 23 March 2000, thereafter at intervals not to exceed 6000 flight cycles.\n\nThis Airworthiness Directive becomes effective on 23 March 2000.\n\nBackground: A report was received of the failure of the L-shaped flap fittings due to fatigue. The initial failure occurred in the aft lug where the swaged bushing is installed. Some time after this, a consequent failure occurred in the bottom radius of the adjacent L- shaped fitting, which resulted in a jammed flap condition.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 10 February 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 23 February 2000.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific fatigue failure mode in a particular aircraft component. The document shows no evidence of scope creep — it targets exactly the unsafe condition described in the background (failed flap fitting lugs) with precisely tailored applicability and requirements."},"complexity_factors":["Single, clearly defined applicability (specific aircraft models and serial numbers)","Straightforward two-tier inspection regime (visual + NDT) with simple recurring intervals","Only one cross-reference to an external technical document (SAAB Service Bulletin)","Clear terminating action specified (incorporation of Service Bulletin 340-57-038)","Minimal defined terms (only standard aviation acronyms like NDT, LFV, WS)","No nested exceptions or conditional logic — requirements apply uniformly to all affected aircraft","Short document (approximately 300 words of substantive text)"],"plain_english_summary":"This AD requires owners/operators of certain Saab 340A/B aircraft to inspect the flap aft attachment lug after fatigue cracking was found that can jam flaps and threaten safe control. It mandates recurring visual and periodic non‑destructive inspections on affected serial-numbered aircraft, and permits a one‑time service bulletin modification as a terminating action. It affects operators of the listed Saab 340s and aims to catch cracks before failure."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The AD applies only to the specified SAAB SF340A/B serial-number ranges with listed flap assemblies and mandates inspections and corrective action per the SAAB service bulletin to address reported fatigue failures. It does not expand applicability beyond those aircraft/parts or add unrelated obligations, so the scope remains aligned with the stated unsafe‑condition mitigation."},"complexity_factors":["Technical aviation maintenance requirements (visual and NDT inspections; fatigue failure context).","Multiple timing metrics: recurring visual inspections measured in flight hours (800 hours) and NDT measured in flight cycles (6,000 cycles).","Applicability limited by aircraft model, serial-number ranges, and specific flap assembly part numbers.","Cross-reference to manufacturer Mandatory Service Bulletins (340‑57‑037 and terminating 340‑57‑038) which determine corrective actions.","Reference to another airworthiness authority's AD (LFV AD 1‑153) and gazette/effective dates introduces administrative cross-checks.","Operational impact on operators who must schedule inspections and bear repair costs; potential grounding or maintenance scheduling friction."],"plain_english_summary":"This Airworthiness Directive requires operators of certain SAAB SF340A and 340B aircraft with specified flap assemblies to inspect and, if necessary, repair the aft attachment lug of flap fittings at wing station 123.38. It mandates visual inspections every 800 flight hours until a non‑destructive (NDT) inspection is performed within 6,000 flight cycles, and requires following SAAB Mandatory Service Bulletin 340‑57‑037 (with SB 340‑57‑038 as terminating action). Operators pay for inspections and repairs; the CASA delegate enforces compliance."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-76-aft-attachment-lug-of-flap-fittings-at-ws-123-38","history":"/api/acts/ad-sf340-76-aft-attachment-lug-of-flap-fittings-at-ws-123-38/history","analysis":"/api/acts/ad-sf340-76-aft-attachment-lug-of-flap-fittings-at-ws-123-38/analysis","conflicts":"/api/acts/ad-sf340-76-aft-attachment-lug-of-flap-fittings-at-ws-123-38/conflicts","importantCases":"/api/acts/ad-sf340-76-aft-attachment-lug-of-flap-fittings-at-ws-123-38/important-cases","documents":"/api/acts/ad-sf340-76-aft-attachment-lug-of-flap-fittings-at-ws-123-38/documents"}}