{"id":"F2006L03627","name":"AD/SA 315/8 - Tail Rotor Gearbox Support Lugs at Tail Boom","slug":"ad-sa-315-8-tail-rotor-gearbox-support-lugs-at-tail-boom","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":137328,"registerId":"commonwealth-F2006L03627-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter SA 315 (Lama) Series Helicopt","sectionType":"division","heading":"Eurocopter SA 315 (Lama) Series Helicopters","content":"### Eurocopter SA 315 (Lama) Series Helicopters\n\n| AD/SA 315/8 | Tail Rotor Gearbox Support Lugs at Tail Boom | 12/2006 |\n| ----------- | -------------------------------------------- | ------- |\n\n| Applicability: | Model SA 315 B helicopters.                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect in accordance with paragraph 1.C.2. of Eurocopter Service BulletinNo. 05.19.2. Visually inspect the tubes/tail rotor gearbox support lugs junction areas.Note: DGAC AD 82-29-22(B) refers.                                                                                                                                                                                    |\n| Compliance:    | 1. Unless already accomplished, within 50 flight hours after the effective date of this Directive. Inspect thereafter at each removal/installation of the tail rotor gearbox and tail boom.2. After Requirement 1 compliance, during last flight of the day inspection; and, after every 400 flight hours of operation, accomplish a detailed visual inspection with a magnifying glass. |\n|                | This Airworthiness Directive becomes effective on 23 November 2006.                                                                                                                                                                                                                                                                                                                      |\n| Background:    | The DGAC requires inspections to detect possible cracks at the location of the tail rotor gearbox support lugs on tail boom.                                                                                                                                                                                                                                                             |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n13 October 2006","sortOrder":0},{"sectionNumber":"AD/SA 315/8","sectionType":"part","heading":"AD/SA 315/8","content":"## AD/SA 315/8","sortOrder":1},{"sectionNumber":"Tail Rotor Gearbox Support Lugs at Tail ","sectionType":"part","heading":"Tail Rotor Gearbox Support Lugs at Tail Boom","content":"## Tail Rotor Gearbox Support Lugs at Tail Boom","sortOrder":2},{"sectionNumber":"12/2006","sectionType":"part","heading":"12/2006","content":"## 12/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive implements the DGAC inspection requirement to detect possible cracks at the tail‑rotor gearbox support lugs; it is confined to SA 315 B helicopters and prescribes inspection timings and methods without expanding to additional components or broader regulatory powers (Applicability; Requirement; Background)."},"complexity_factors":["Narrow technical scope: targets a single model and a single structural area (Applicability).","Prescriptive inspection regime with specific timing and repetition requirements (Compliance).","Dependence on an external service bulletin for inspection procedure increases operational cross‑referencing (Requirement).","Clear compliance deadlines (50 flight hours initial) reduce legal ambiguity but create scheduling/operational burden (Compliance).","Enforcement and defect assessment may require technical judgment by maintenance personnel, creating modest discretion."],"plain_english_summary":"This Airworthiness Directive requires operators of Eurocopter SA 315 B (Lama) helicopters to inspect the tail‑rotor gearbox support‑lug junction on the tail boom for cracks, using the Eurocopter service bulletin procedure (Applicability; Requirement).\n\nAn initial check must be done within 50 flight hours, with checks at gearbox/boom removal, daily last‑flight inspections and detailed inspections every 400 flight hours; operators pay inspection, repair and downtime costs, and must follow the regulator’s compliance schedule (Compliance; Background)."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific safety-of-flight issue with a particular helicopter model. The scope remains precisely limited to the identified cracking risk in the tail rotor gearbox support lugs, consistent with the original purpose of ADs to mandate corrective action for unsafe conditions."},"complexity_factors":["Single, specific mechanical component addressed (tail rotor gearbox support lugs)","Only one model of helicopter affected (SA 315 B)","Clear, sequential compliance requirements with specific timeframes","Minimal cross-referencing (only references one Eurocopter Service Bulletin and one French AD)","No defined terms section or interpretation provisions","Straightforward inspection methodology (visual inspection with magnifying glass)","Short document length (approximately 200 words of substantive content)"],"plain_english_summary":"This AD mandates inspections of the tail-rotor gearbox support lugs on Eurocopter SA 315 B “Lama” helicopters. It affects owners, operators and maintenance personnel and requires timely, repeated checks for cracks. The inspections aim to prevent lug failure that could allow the tail-rotor gearbox to detach in flight and cause loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sa-315-8-tail-rotor-gearbox-support-lugs-at-tail-boom","history":"/api/acts/ad-sa-315-8-tail-rotor-gearbox-support-lugs-at-tail-boom/history","analysis":"/api/acts/ad-sa-315-8-tail-rotor-gearbox-support-lugs-at-tail-boom/analysis","conflicts":"/api/acts/ad-sa-315-8-tail-rotor-gearbox-support-lugs-at-tail-boom/conflicts","importantCases":"/api/acts/ad-sa-315-8-tail-rotor-gearbox-support-lugs-at-tail-boom/important-cases","documents":"/api/acts/ad-sa-315-8-tail-rotor-gearbox-support-lugs-at-tail-boom/documents"}}