{"id":"F2005L02471","name":"AD/S-PUMA/63 - CPI 503 Emergency Locator Transmitter","slug":"ad-s-puma-63-cpi-503-emergency-locator-transmitter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":37088,"registerId":"commonwealth-F2005L02471-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/63 | CPI 503 Emergency Locator Transmitter | 11/2005 DM |\n| ------------ | ------------------------------------- | ---------- |\n\n| Applicability: | AS 332 L2 helicopters equipped with a type CPI 503 (Crash Position Indicator) Emergency Locator Transmitter (ELT) fitted with an Interface Unit Part Number (P/N) 503-24 (704A45737061) with a serial number in the range from 100 up to and including 125.          |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Check the serial number of the Interface Unit in accordance with the procedure detailed in Section 2 of Eurocopter AS 332 Alert Telex (AT) 25.01.67 dated 16 August 2005 or later revision approved by the French Direction Générale de l’Aviation Civile (DGAC). |\n|                | 2. If the serial number falls with in the range specified in AT 25.01.67 contact Eurocopter Customer Service Technical Support Operations Department, as detailed in the AT, for instructions regarding the replacement of the Interface Unit.                       |\n|                | 3. Interface Unit Part Number (P/N) 503-24 (704A45737061) with a serial number in the range from 100 up to and including 125 may not be installed on any helicopter as a replacement spare unless Requirement 2 has been complied with.                              |\n|                | Note: DGAC AD F-2005-154 (EASA Approval 2005-6189) refers.                                                                                                                                                                                                           |\n| Compliance:    | For Requirement 1 - No later than one month after the effective date of this Directive.                                                                                                                                                                              |\n|                | For Requirement 2 - Immediately following completion of the Requirement 1 check.                                                                                                                                                                                     |\n|                | For Requirement 3 - Prior to installation on a helicopter.                                                                                                                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 5 September 2005.                                                                                                                                                                                                  |\n| Background:    | The DGAC has received two reports of inadvertent ejections of the ELT on AS 332 L2 helicopters due to manufacturing defects on a printed circuit card in the Interface Unit which resulted in electrical short circuits.                                             |\n\n|     | This Directive requires an initial inspection to determine if any affected Interface Units are installed in helicopters and ultimately their replacement with serviceable items. |\n| --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n31 August 2005","sortOrder":0},{"sectionNumber":"AD/S-PUMA/63","sectionType":"part","heading":"AD/S-PUMA/63","content":"## AD/S-PUMA/63","sortOrder":1},{"sectionNumber":"CPI 503 Emergency Locator Transmitter","sectionType":"part","heading":"CPI 503 Emergency Locator Transmitter","content":"## CPI 503 Emergency Locator Transmitter","sortOrder":2},{"sectionNumber":"11/2005 DM","sectionType":"part","heading":"11/2005 DM","content":"## 11/2005 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This Directive remains narrowly focused on identifying and removing a specific defective Interface Unit serial-number range from service (and preventing their use as spares) to address reported inadvertent ELT ejections. It does not broaden the safety objective beyond that original, specific remediation (see Applicability; Requirements; Background)."},"complexity_factors":["Narrow applicability limited to one helicopter model (AS 332 L2) and one part number (P/N 503-24) with a short serial-number range (100–125)","Three discrete requirements (check, contact for replacement, ban on installing affected spares)","Single short compliance timetable (one month for the initial check, immediate action after finding affected units)","Cross-references to an external Alert Telex (AT 25.01.67) and the DGAC AD (F-2005-154 / EASA Approval 2005-6189) but minimal internal conditional logic","No multiple nested exceptions or complicated penalty/enforcement provisions","Small document length and limited number of defined terms"],"plain_english_summary":"**What this instrument does (mechanics)\n\n- Applies to: Eurocopter AS 332 L2 helicopters that have a CPI 503 Emergency Locator Transmitter (ELT) fitted with Interface Unit Part Number (P/N) 503-24 (704A45737061) whose serial number is 100 through 125 (Applicability). \n\n- Required actions:  \n  - Check the Interface Unit serial number following the procedure in Section 2 of Eurocopter AS 332 Alert Telex (AT) 25.01.67 (Requirement 1).  \n  - If the serial number is in the 100–125 range, contact Eurocopter Customer Service Technical Support for instructions about replacing the Interface Unit (Requirement 2).  \n  - Do not install an Interface Unit P/N 503-24 with serial 100–125 as a replacement spare on any helicopter unless you have followed Requirement 2 (Requirement 3). \n\n- Timing (deadlines):  \n  - Complete the serial-number check within one month of the Directive’s effective date (Compliance for Requirement 1).  \n  - Follow replacement instructions immediately after completing the check if the unit is in the affected range (Compliance for Requirement 2).  \n  - The ban on installing affected spares applies before any installation (Compliance for Requirement 3).  \n\n- Why the rule exists (stated reason): The French DGAC received two reports that the ELT had been inadvertently ejected from AS 332 L2 helicopters because of a manufacturing defect (a printed circuit card fault in the Interface Unit) that caused electrical short circuits. The Directive therefore requires inspection and, where necessary, replacement of the affected Interface Units (Background).\n\n\nAnalytical lens — who pays, who decides, and what changes in behaviour\n\n- Who pays: Operators or owners of affected AS 332 L2 helicopters bear direct costs. They must perform the serial-number checks, arrange any required replacements, and absorb aircraft downtime and parts/labour costs (see Requirement 1–2 and Compliance). If Eurocopter supplies replacement parts, operators pay for parts and installation unless Eurocopter offers warranty or a service campaign otherwise. \n\n- Who decides: The aircraft operator decides when and how to schedule the inspections and replacements subject to the regulatory timeframes. Eurocopter Customer Service provides the replacement instruction after contact (Requirement 2). The Civil Aviation Safety Authority enforces compliance locally; DGAC/EASA are referenced as the approval/authority for the source Alert Telex and related AD (Note / Background). \n\n- Behavioural effects: Operators must 1) check inventory and installed units for affected serials, 2) restrict use of suspect units as spares until Eurocopter’s instructions are followed, and 3) replace defective units as instructed. Maintenance organisations must add serial-number tracking steps to their processes and log compliance. \n\n\nCosts, incentives, trade-offs and implementation risks\n\n- Direct costs and downtime: Time to perform the one-month inspection and any replacements, plus cost of replacement Interface Units and installation labour. Aircraft may be temporarily unavailable while replacement is arranged and fitted (Compliance for Requirement 1–2). \n\n- Supply and timing risk: If many helicopters are affected or service centres are limited, there is risk of part shortages or scheduling delays; the AD’s immediate replacement instruction (Requirement 2) may concentrate demand quickly. \n\n- Concentrated benefits, diffuse costs: Eurocopter (as the supplier) receives concentrated demand for replacements and technical support; many operators bear smaller, dispersed costs (Requirement 2 and the Note referencing Eurocopter AT). \n\n- Compliance and administrative burden: Operators must locate and verify serial numbers on installed units and on spare parts inventories, and must prevent installation of suspect spares (Requirement 3). This requires record checks, maintenance tag updates and possible supply-chain controls. \n\n- Implementation risk: Accurate serial-number traceability is essential. Units removed or held as spares must be tracked to avoid inadvertent installation (Requirement 3). Misreading the AT procedures or delayed contact with Eurocopter could leave defective units in service. \n\n- Alternatives and limits: The AD prescribes inspection and replacement only; it does not offer temporary mitigations (e.g., removing the ELT) or financial remedies for operators. Any warranty or cost-sharing would come from Eurocopter’s customer relations, not the Directive text (Requirement 2). \n\n\nBottom line (neutral): The Directive narrowly targets a known manufacturing defect in a specific Interface Unit serial-number range. It mandates a one-month serial-number check, immediate contact with Eurocopter if an affected unit is found, and forbids installing suspect spare units until Eurocopter’s replacement instructions have been followed. Operators pay for inspection and replacement, must tighten serial-number controls for spares, and may face scheduling or parts-availability risks. (See Applicability; Requirements 1–3; Compliance; Background.)"},"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 targeted safety directive addressing a specific manufacturing defect in a specific aircraft component. The scope remains precisely limited to the identified safety risk and has not expanded beyond the original purpose of preventing inadvertent ELT ejection."},"complexity_factors":["Single, narrow applicability: only one helicopter model (AS 332 L2) with one specific part (CPI 503 ELT) and specific serial number range (100–125)","Only three operational requirements with clear sequential logic (check → contact → don't install)","No defined terms section; all technical terms are explicit in the text","Minimal cross-referencing: only one external reference to a French DGAC directive and a Eurocopter Alert Telex","Straightforward compliance dates with no conditional exceptions or nested provisions","Total length is approximately one page with substantial repetition due to formatting artifacts"],"plain_english_summary":"This AD mandates owners/operators of Eurocopter AS332 L2 helicopters fitted with CPI 503 emergency locator transmitters to check the Interface Unit serial number and replace affected units.  \n\nA manufacturing defect in Interface Unit circuit boards (serials 100–125) has caused ELTs to short and eject. Check within one month, contact Eurocopter immediately for replacements if in that range, and do not install these Interface Units as spares."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-puma-63-cpi-503-emergency-locator-transmitter","history":"/api/acts/ad-s-puma-63-cpi-503-emergency-locator-transmitter/history","analysis":"/api/acts/ad-s-puma-63-cpi-503-emergency-locator-transmitter/analysis","conflicts":"/api/acts/ad-s-puma-63-cpi-503-emergency-locator-transmitter/conflicts","importantCases":"/api/acts/ad-s-puma-63-cpi-503-emergency-locator-transmitter/important-cases","documents":"/api/acts/ad-s-puma-63-cpi-503-emergency-locator-transmitter/documents"}}