{"id":"F2005L02510","name":"AD/S-PUMA/58 Amdt 1 - Swashplate Bearing Attaching Screws","slug":"ad-s-puma-58-amdt-1-swashplate-bearing-attaching-screws","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":37199,"registerId":"commonwealth-F2005L02510-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 332 (Super Puma) Series He","sectionType":"division","heading":"Eurocopter AS 332 (Super Puma) Series Helicopters","content":"### Eurocopter AS 332 (Super Puma) Series Helicopters\n\n| AD/S-PUMA/58 Amdt 1 | Swashplate Bearing Attaching Screws | 11/2005 TX |\n| ------------------- | ----------------------------------- | ---------- |\n\n| Applicability: | Eurocopter AS 332 L2 helicopters.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Perform a visual or tactile check in order to make sure that all screw heads are in place in accordance with paragraph 2.B. of Eurocopter Alert Telex (AT) 62.00.66 R1 or later DGAC approved revision.2. For main rotor mast assemblies held as spares that have logged more than 750 flying hours since new or overhaul, comply with the instructions detailed in paragraph 2.B of Eurocopter AT 62.00.66 R1 or later DGAC approved revision.3. If one or more than one screw heads are missing following the check detailed in paragraph 2.B. of Eurocopter Alert Telex (AT) 62.00.66 R1 or later DGAC approved revision, then:(a) Where the main rotor mast is installed, remove the main rotor mast assembly from service.(b) Where the main rotor mast is held as spares, do not install the main rotor mast assembly.Note: DGAC AD F-2005-129 EASA approval No. 2005-6095 dated 13 July 2005 refers. |\n| Compliance:    | 1. For installed main rotor mast assemblies having logged less than 750 flying hours since new or last overhaul: At the latest at 770 flying hours, then at intervals not exceeding 100 flying hours.For installed main rotor mast assembly having logged 750 flying hours or more since new or last overhaul; andWas checked in compliance with AD/S-PUMA/58 original issue less than 80 flying hours ago: At the latest 100 flying hours following the last check, then at intervals not exceeding 100 flying hours; orWas checked in compliance with AD/S-PUMA/58 original issue more than 80 flying hours ago: No later than within the next 20 flying hours after the effective date of this directive, then at intervals not exceeding 100 flying hours.                                                                                                                                                 |\n\n|             | 2. Before installation in a helicopter.3. Before further flight.                                                                                                                                                                                                                                                                                                                                                                                  |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | This Amendment becomes effective on 10 September 2005.                                                                                                                                                                                                                                                                                                                                                                                            |\n| Background: | The Directive is in response to the discovery of a case of broken screw heads of the swashplate bearing attaching screws. In time, these screw head losses could lead to a helicopter control loss.This amendment incorporates the existing requirements of current Directive and introduces a periodic inspection of the swashplate bearing attaching screw heads integrity.The original issue of this Directive became effective on 9 May 2005. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n2 September 2005","sortOrder":0},{"sectionNumber":"AD/S-PUMA/58 Amdt 1","sectionType":"part","heading":"AD/S-PUMA/58 Amdt 1","content":"## AD/S-PUMA/58 Amdt 1","sortOrder":1},{"sectionNumber":"Swashplate Bearing Attaching Screws","sectionType":"part","heading":"Swashplate Bearing Attaching Screws","content":"## Swashplate Bearing Attaching Screws","sortOrder":2},{"sectionNumber":"11/2005 TX","sectionType":"part","heading":"11/2005 TX","content":"## 11/2005 TX","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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment expands the original directive’s scope by adding a recurring, flight‑hour‑based inspection regime and explicit rules for spare main rotor mast assemblies. The original issue (effective 9 May 2005) responded to an observed broken screw‑head event and required checks; the amendment incorporates those original requirements and introduces periodic inspections and specific compliance intervals (750 h/770 h/100 h/80 h/20 h thresholds) and explicit prohibitions on installing spares found deficient. In short, the measure moved from a reactive single‑event check to an ongoing preventive inspection programme, increasing ongoing compliance obligations for operators and maintainers."},"complexity_factors":["Short directive with narrow technical scope (single component: swashplate bearing attaching screws).","Cross‑reference to an external document: Eurocopter Alert Telex 62.00.66 R1 or later DGAC‑approved revision (inspection procedure located outside the directive).","Several numeric thresholds and conditional timing rules: 750 flying hours, 770 flying hours, 100‑hour intervals, 80‑hour and 20‑hour cutoffs.","Different rules for installed assemblies versus spare assemblies (tested before installation).","Different immediate actions depending on inspection outcome (remove from service vs do not install).","Requirement to track flying hours at the mast assembly level (administrative/recordkeeping complexity).","Reference to approvals by a foreign authority (DGAC) which can change the operative inspection procedure."],"plain_english_summary":"**What this instrument does (mechanical effect)\n\n- Requires operators of Eurocopter AS 332 L2 helicopters to inspect the heads of the swashplate bearing attaching screws (the screws that secure the swashplate bearing to the main rotor mast) using the visual or tactile methods set out in Eurocopter Alert Telex 62.00.66 R1 (or a later DGAC‑approved revision).\n- Requires the same inspection for main rotor mast assemblies held as spares if those mast assemblies have logged more than 750 flying hours since new or overhaul.\n- If one or more screw heads are missing, the directive requires immediate removal of the main rotor mast assembly from service if installed in a helicopter, and prohibits installation if the affected mast is a spare.\n- Sets a timetable for periodic inspections based on the main rotor mast assembly's logged flying hours and the timing of prior inspections. Key timings: an initial check by 770 flying hours for newer masts (<750 hours), then every 100 flying hours; for masts already ≥750 hours there are specific shorter deadlines depending on when the last check was performed (see Compliance schedule).\n- Requires checking before installation of a spare mast, and before further flight where a defect has been found or as triggered by the schedule.\n\n**Who it affects\n\n- Operators and maintenance organisations responsible for Eurocopter AS 332 L2 helicopters and spare main rotor mast assemblies.\n- Maintenance personnel who will perform the visual/tactile inspections and record flying hours.\n- Supply/maintenance chains that provide replacement or overhauled main rotor mast assemblies.\n\n**Why it matters (stated purpose and mechanical consequences)\n\n- The stated reason for the directive is the discovery of broken or lost screw heads on the swashplate bearing attaching screws; missing screw heads can, over time, lead to loss of helicopter control. Mechanically, the rule is intended to detect missing screw heads early and to keep assemblies with missing screws out of service.\n\n**How this works in practice (costs, incentives, and operational effects)\n\n- Who pays: Operators pay for the inspection labour, record‑keeping, and any corrective action (repair/overhaul or replacement of the mast assembly). If a mast is removed from service, operators incur grounding/downtime costs and parts/overhaul costs.\n- Who decides: Maintenance organisations and licensed engineers perform the inspections according to the Eurocopter Alert Telex procedures referenced in the directive. The DGAC (and applicable civil aviation authority) approves revisions to the referenced alert telex.\n- Behaviour changes required: Operators must track flying hours at the mast‑assembly level, carry out checks at the specified intervals, check spares before installation, and remove or not install masts with missing screw heads. They may also accelerate overhauls or increase spare inventory to avoid operational disruption.\n\n**Implementation and compliance risks / trade‑offs\n\n- Reliance on visual/tactile inspection methods (as specified in the Eurocopter Alert Telex) may miss subsurface or developing fatigue not evident at a glance. The directive mitigates this by shortening inspection intervals for older assemblies, but the effectiveness depends on the thoroughness of inspections and the quality of the Alert Telex procedure.\n- Recordkeeping and accurate flying‑hour accounting at the mast level are required; errors in tracking can shift timing and create compliance risk.\n- The directive creates concentrated benefits (reduced probability of catastrophic control failure for any helicopter found to have missing screws) and diffuse costs (inspection labour and potential downtime spread across operators). There is potential for operational substitution (earlier overhauls or higher spare inventories).\n- Administrative discretion: the directive ties compliance to Eurocopter Alert Telex 62.00.66 R1 or later DGAC‑approved revisions, which means the exact inspection steps can change if the manufacturer issues an updated telex and it is DGAC‑approved.\n\n**Specific text references (where to look in the directive)\n\n- The inspection requirement and reference to Eurocopter AT 62.00.66 R1: Requirement paragraphs (1) and (2).\n- Actions if screw heads are missing and prohibition on installing affected spares: Requirement paragraph (3)(a) and (3)(b).\n- The compliance scheduling rules based on flying hours and prior check timing: Compliance section (multiple bullets setting 750 h, 770 h, 100 h, 80 h, and 20 h thresholds).\n\n**Net effect summary in one sentence**\n- The directive forces routine, flight‑hour‑based visual/tactile inspections of swashplate bearing attaching screw heads on AS 332 L2 main rotor mast assemblies, requires removal or non‑installation of any mast found with missing screw heads, and establishes a specific recurring inspection schedule tied to flying hours and prior checks."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: addressing the specific safety defect of swashplate bearing attaching screws on Eurocopter AS 332 L2 helicopters. The amendment introduces periodic inspection requirements but does not expand to other aircraft types, components, or unrelated safety issues. The scope is consistent with the original May 2005 directive."},"complexity_factors":["Multiple compliance pathways based on flying hours logged (less than 750 vs 750+ hours)","Nested conditional logic for high-hour assemblies depending on when last checked relative to 80 flying hours ago","Cross-reference to external manufacturer document (Eurocopter Alert Telex 62.00.66 R1) without reproducing its content","Reference to French aviation authority (DGAC) and European Aviation Safety Agency (EASA) approval","Amendment structure requires understanding of 'original issue' vs 'Amendment 1' effective dates","Dual applicability — installed components vs spare parts held in inventory"],"plain_english_summary":"This AD for Eurocopter AS332 L2 (Super Puma) helicopters requires operators and holders of spare main rotor masts to inspect the screws securing the swashplate bearing per Eurocopter instructions, with recurring checks set by mast service hours and immediate removal from service if screws are missing. It’s a flight-safety measure: broken screw heads were found in service and could lead to loss of control, so the amendment adds periodic inspections rather than one‑off checks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-puma-58-amdt-1-swashplate-bearing-attaching-screws","history":"/api/acts/ad-s-puma-58-amdt-1-swashplate-bearing-attaching-screws/history","analysis":"/api/acts/ad-s-puma-58-amdt-1-swashplate-bearing-attaching-screws/analysis","conflicts":"/api/acts/ad-s-puma-58-amdt-1-swashplate-bearing-attaching-screws/conflicts","importantCases":"/api/acts/ad-s-puma-58-amdt-1-swashplate-bearing-attaching-screws/important-cases","documents":"/api/acts/ad-s-puma-58-amdt-1-swashplate-bearing-attaching-screws/documents"}}