{"id":"F2006L03630","name":"AD/SA 315/12 - Transmission Support Platform Forward Attachment Fittings","slug":"ad-sa-315-12-transmission-support-platform-forward-attachment-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":137335,"registerId":"commonwealth-F2006L03630-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 315/12 | Transmission Support PlatformForward Attachment Fittings | 12/2006 |\n| ------------ | -------------------------------------------------------- | ------- |\n\n| Applicability: | Model SA 315 B helicopters not modified to AMS 2195 or LAMA Service Bulletin No. 53.05.                                                                                                                                                                                                                         |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect in accordance with LAMA Service Bulletin No. 05.17.If cracks or distortions are detected during any inspection, before further flight, replace either the damaged stringer by a new part of the same part number, or replace the whole transmission support platform.Note: DGAC AD 80-250-21(B) refers. |\n| Compliance:    | Unless the initial inspection is already accomplished, before 23 December 2006. Inspect thereafter at intervals not to exceed 400 flight hours.                                                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 23 November 2006.                                                                                                                                                                                                                                             |\n| Background:    | Reports were received of cracks on the stringer under the transmission support platform at forward attachment clamps, part number 55212.280 BGZ, on the main structure.                                                                                                                                         |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n13 October 2006","sortOrder":0},{"sectionNumber":"AD/SA 315/12","sectionType":"part","heading":"AD/SA 315/12","content":"## AD/SA 315/12","sortOrder":1},{"sectionNumber":"Transmission Support PlatformForward Att","sectionType":"part","heading":"Transmission Support PlatformForward Attachment Fittings","content":"## Transmission Support Platform  \nForward Attachment Fittings","sortOrder":2},{"sectionNumber":"12/2006","sectionType":"part","heading":"12/2006","content":"## 12/2006","sortOrder":3}],"analysis":{"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"},"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 tightly focused on the reported cracking issue in the transmission support platform structure, with no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Single, specific mechanical component addressed (transmission support platform forward attachment fittings)","Only one inspection method referenced (LAMA Service Bulletin No. 05.17)","Simple binary compliance path: inspect → if cracked, replace → if not cracked, re-inspect every 400 hours","Limited applicability (one helicopter model, specific exclusions)","No nested exceptions or conditional logic beyond the initial applicability exclusion","Short document with minimal cross-referencing (only references one French DGAC AD and one service bulletin)","Clear deadline and interval specified"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators of Eurocopter SA 315 B \"Lama\" helicopters (except those modified to AMS 2195 or compliant with LAMA SB No. 53.05) to inspect the transmission support platform forward attachment fittings/stringer for cracks or distortion using LAMA SB No. 05.17.\n\nFirst inspection was due by 23 Dec 2006 (if not already done) and must be repeated every 400 flight hours; any cracked or distorted stringer or platform must be replaced before further flight."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive confines action to SA 315B helicopters that lack specified modifications and requires inspection and replacement where cracks are found (Applicability; Requirement; Compliance). It does not broaden applicability beyond those unmodified aircraft nor add additional regulatory powers; it prescribes inspections, a remedial repair choice, and a repeat interval consistent with the stated technical concern (Background)."},"complexity_factors":["Applicability limited by modification status — operators must determine whether an aircraft is 'not modified to AMS 2195 or LAMA SB No. 53.05' before compliance obligations apply (Applicability).","Normative reference to an external service bulletin for inspection procedure — compliance requires access to and reliance on LAMA Service Bulletin No. 05.17 (Requirement).","Clear, mandatory defect response — detected cracks/distortions must be repaired before further flight, creating an immediate grounding decision for affected aircraft (Requirement).","Defined inspection frequency and initial deadline — initial inspection date (23 December 2006) and recurring interval (every 400 flight hours) set operational scheduling constraints (Compliance).","Choices for corrective action increase parts/repair complexity — option to replace either the damaged stringer with same PN or the entire support platform affects repair cost and logistics (Requirement).","Enforcement and effective date are explicit but short lead-time — effective from 23 November 2006 with inspection due by 23 December 2006, imposing a narrow window for operators to act (Compliance).","Technical cause linkage is limited to reported cracks — the AD is reactive to reported damage without prescribing design changes, so long‑term mitigation depends on operator repairs and possible later modifications (Background)."],"plain_english_summary":"Requires operators of Eurocopter SA 315B (Lama) helicopters not modified to AMS 2195 or LAMA Service Bulletin No. 53.05 to inspect the transmission support platform forward attachment fittings per LAMA Service Bulletin No. 05.17, replace any cracked or distorted stringer (or the whole platform) before further flight, and repeat inspections every 400 flight hours. Initial inspection due by 23 December 2006 unless already done.\n\nThis affects owners/operators who must pay for inspections and any replacements and manage aircraft availability to meet the compliance schedule."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sa-315-12-transmission-support-platform-forward-attachment-fittings","history":"/api/acts/ad-sa-315-12-transmission-support-platform-forward-attachment-fittings/history","analysis":"/api/acts/ad-sa-315-12-transmission-support-platform-forward-attachment-fittings/analysis","conflicts":"/api/acts/ad-sa-315-12-transmission-support-platform-forward-attachment-fittings/conflicts","importantCases":"/api/acts/ad-sa-315-12-transmission-support-platform-forward-attachment-fittings/important-cases","documents":"/api/acts/ad-sa-315-12-transmission-support-platform-forward-attachment-fittings/documents"}}