{"id":"F2005L00620","name":"AD/S-62/11 - Main Rotor Brake Disc","slug":"ad-s-62-11-main-rotor-brake-disc","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":112894,"registerId":"commonwealth-F2005L00620-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Sikorsky S-62 Series Helicopters","sectionType":"division","heading":"Sikorsky S-62 Series Helicopters","content":"### Sikorsky S-62 Series Helicopters\n\n| AD/S-62/11 | Main Rotor Brake Disc | 4/2005 |\n| ---------- | --------------------- | ------ |\n\n| Applicability: | Model S-62 series helicopters, equipped with part number S6235-20213 or part number 62350-22013-101 rotor brake discs.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Replace part number S6235-20213 rotor brake disc with part number 62350-22013 -101 rotor brake disc in accordance with Paragraph 2 of Sikorsky Service Bulletin (SB) 62B35-13 or SB 62B35-13A.2. Accomplish a detailed inspection of the part number 62350-22013-101 rotor brake disc installation and a dye penetrant inspection of the rotor brake disc for cracking; in accordance with Paragraph E (2) of Sikorsky Alert Service Bulletin 62B35-12 (except that the minimum thickness for the new disc is .449 inches and the attachment bolt torque is changed per Figures 1 and 2 of SB 62B35-13.If cracks are evident during any Requirement 2 inspection, before further flight, replace the disc in accordance with the applicable maintenance manual, and resume the Requirement 2 inspections.Note: FAA AD 81-06-53 R1 Amdt 39-4303 refers. |\n| Compliance:    | 1. Unless already accomplished, before 30 April 2005.2. Before the accumulation of 120 flight hours since new or the last inspection. Inspect thereafter at intervals not to exceed 120 flight hours.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 14 April 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| Background:    | The FAA requires certain actions to prevent operation with cracked rotor brake discs.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n2 March 2005","sortOrder":0},{"sectionNumber":"AD/S-62/11","sectionType":"part","heading":"AD/S-62/11","content":"## AD/S-62/11","sortOrder":1},{"sectionNumber":"Main Rotor Brake Disc","sectionType":"part","heading":"Main Rotor Brake Disc","content":"## Main Rotor Brake Disc","sortOrder":2},{"sectionNumber":"4/2005","sectionType":"part","heading":"4/2005","content":"## 4/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive implements a targeted safety requirement addressing cracked rotor brake discs for specific S-62 part numbers. It mirrors the FAA-referenced action described in the Background and Requirement sections and does not broaden applicability beyond the named models and parts; it prescribes replacement and recurring inspections rather than expanding regulator powers or adding new categories of equipment (Background; Requirement)."},"complexity_factors":["Narrow technical applicability tied to specific part numbers (Applicability)","Mandatory replacement plus both detailed and dye‑penetrant inspections (Requirement)","References to external Sikorsky Service Bulletins and maintenance manual for procedures and torque/thickness specs (Requirement)","Recurring inspection interval and a fixed compliance deadline (120 flight hours; 30 April 2005) (Compliance)","Immediate grounding/replace-before-flight rule if cracking is found (Requirement)","Cross-reference to an FAA AD in the explanatory note, requiring inter-document consistency (Requirement Note)"],"plain_english_summary":"This Airworthiness Directive requires operators of Sikorsky S-62 helicopters fitted with certain rotor brake discs to replace the older S6235-20213 disc with part 62350-22013-101 and to perform detailed and dye‑penetrant inspections for cracking; any cracked disc must be replaced before further flight (Requirement). Operators and their maintenance organisations must carry out the initial replacement by 30 April 2005 and repeat inspections every 120 flight hours, following Sikorsky service bulletins and the maintenance manual (Compliance)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific mechanical defect in a specific helicopter model. It has not expanded beyond its original safety purpose."},"complexity_factors":["Short, single-purpose directive with only 2 main requirements","References 3 external technical documents (Sikorsky Service Bulletins) without reproducing their content","Contains one conditional exception (if cracks found, replace before further flight)","Specific technical measurements included (.449 inches minimum thickness)","Limited defined terms — only part numbers and model references","No nested legislative cross-references or interpretive provisions"],"plain_english_summary":"This CASA Airworthiness Directive mandates that operators of Sikorsky S‑62 helicopters replace an older main rotor brake disc (S6235‑20213) with the newer part (62350‑22013‑101) and perform recurring dye‑penetrant inspections (every 120 flight hours) with specified thickness and bolt‑torque limits. It affects owners, operators and maintenance personnel; the measures address cracked brake discs that could cause loss of braking or helicopter damage."},"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-s-62-11-main-rotor-brake-disc","history":"/api/acts/ad-s-62-11-main-rotor-brake-disc/history","analysis":"/api/acts/ad-s-62-11-main-rotor-brake-disc/analysis","conflicts":"/api/acts/ad-s-62-11-main-rotor-brake-disc/conflicts","importantCases":"/api/acts/ad-s-62-11-main-rotor-brake-disc/important-cases","documents":"/api/acts/ad-s-62-11-main-rotor-brake-disc/documents"}}