{"id":"F2007L03662","name":"AD/DAUPHIN/85 Amdt 2 - CPT 609 Crash Position Transmitter Beacon Antenna","slug":"ad-dauphin-85-amdt-2-cpt-609-crash-position-transmitter-beacon-antenna","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70096,"registerId":"commonwealth-F2007L03662-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter SA 360 and SA 365 (Dauphin) S","sectionType":"division","heading":"Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters","content":"### Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\n| AD/DAUPHIN/85 Amdt 2 | CPT 609 Crash PositionTransmitter Beacon Antenna | 11/2007 DM |\n| -------------------- | ------------------------------------------------ | ---------- |\n\n| Applicability: | AS 365 N3 helicopters, all serial numbers, if equipped with CPT 609 crash position transmitter beacons fitted with antenna Part Number (P/N) 070-0609-021.                                                                                                               |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. Check the attachment of the antenna of the CPT 609 crash position transmitter beacon in accordance with the instructions in paragraph 2.B.2 of EurocopterAS 365 Alert Service Bulletins (ASB) 05.00.53 Revision 1 dated 10 July 2007 or later EASA approved revision. |\n|                | Note 1: The Requirement 1 check may be accomplished by a suitably trained pilot.                                                                                                                                                                                         |\n|                | 2. If the antenna is found to be damaged or fails during the Requirement 1 check, remove the antenna, in compliance with the instructions specified in paragraph 2.B.2. of ASB 05.00.53 Revision 1 or Revision 2 or later EASA approved revision.                        |\n|                | 3. Replace the P/N 070-0609-021 antenna with a P/N 070-0609-022 antenna in accordance with the instructions specified in paragraph 1.E.1.a of ASB 05.00.53 Revision 1 or Revision 2 or later EASA approved revision.                                                     |\n|                | After the installation of a P/N 070-0609-022 antenna, the Requirement 1 post-flight inspections are no longer required.                                                                                                                                                  |\n|                | 4. Antenna P/N 070-0609-021 may not be installed as a replacement part on any helicopters affected by this Directive. Any remaining P/N 070-0609-021 antennas held as spares must be discarded or returned to Eurocopter for disposal.                                   |\n|                | Note 2: EASA AD 2007-0224 R1 corrected refers.                                                                                                                                                                                                                           |\n| Compliance:    | For Requirement 1 - After each flight until Requirement 3 is accomplished.                                                                                                                                                                                               |\n|                | For Requirement 2 - Before the next flight following the Requirement 1 check.                                                                                                                                                                                            |\n|                | For Requirement 3 - No later than 15 November 2007.                                                                                                                                                                                                                      |\n|                | For Requirement 4 - After 15 November 2007.                                                                                                                                                                                                                              |\n|                | This Amendment becomes effective on 21 September 2007.                                                                                                                                                                                                                   |\n\n| Background: | Eurocopter has received reports of failure of the mounting base of the CPT 609 crash position transmitter beacon antenna. The failures have been determined to be caused by vibration. Failure of the antenna will significantly reduce the radiated power of the crash position transmitter and loss of the antenna during flight may jeopardize the safety of persons on the ground.                                                              |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | The original issue of this Directive required the antenna to be inspected for integrity after each flight and, if necessary, the replacement of any defective antenna.                                                                                                                                                                                                                                                                              |\n|             | The European Aviation Safety Agency (EASA) has advised that following studies of the vibration phenomena, the antenna manufacturer has developed a new antenna, fitted with a mounting base which is not subject to failure due to vibrations. Eurocopter have revised their ASB 05.00.53 accordingly to instruct the replacement of existing antennas with the new P/N 070-0609-022 antenna as terminating action for the post-flight inspections. |\n|             | Amendment 1 retained the repetitive inspection requirements and required the replacement of all P/N 070-0609-021 antennas with P/N 070-0609-022 antennas, after which the post-flight inspections can be discontinued. In addition, Amendment 1 prohibited the (re)installation of P/N 070-0609-021 on any of the affected helicopters after 30 September 2007.                                                                                     |\n|             | This Amendment continues the requirements of Amendment 1 but revised the compliance date for Requirement 3 and 4 to 15 November 2007.                                                                                                                                                                                                                                                                                                               |\n|             | The original issue of this Directive became effective on 26 May 2006.                                                                                                                                                                                                                                                                                                                                                                               |\n|             | Amendment 1 became effective on 30 August 2007.                                                                                                                                                                                                                                                                                                                                                                                                     |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n12 September 2007","sortOrder":0},{"sectionNumber":"AD/DAUPHIN/85 Amdt 2","sectionType":"part","heading":"AD/DAUPHIN/85 Amdt 2","content":"## AD/DAUPHIN/85 Amdt 2","sortOrder":1},{"sectionNumber":"CPT 609 Crash PositionTransmitter Beacon","sectionType":"part","heading":"CPT 609 Crash PositionTransmitter Beacon Antenna","content":"## CPT 609 Crash Position  \nTransmitter Beacon Antenna","sortOrder":2},{"sectionNumber":"11/2007 DM","sectionType":"part","heading":"11/2007 DM","content":"## 11/2007 DM","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the same scope as the original directive and Amendment 1 — addressing the specific antenna defect on AS 365 N3 helicopters. It merely extends compliance deadlines (from 30 September to 15 November 2007) without expanding the affected aircraft population or adding new substantive requirements."},"complexity_factors":["Short, single-purpose directive with clear sequential requirements (1-4)","Only 2 part numbers and 1 specific helicopter model series to track","Simple conditional logic: 'if damaged, then remove'","Cross-reference to only one external document (Eurocopter ASB 05.00.53)","No nested definitions or interpretation sections","Clear compliance dates and deadlines","Note provisions are explanatory rather than creating additional legal obligations"],"plain_english_summary":"This CASA AD requires operators of Eurocopter AS365 N3 helicopters fitted with the CPT 609 emergency-beacon antenna (P/N 070-0609-021) to inspect it after every flight for looseness or damage (a trained pilot may do this) and remove it if defective, because vibration can break the mount and disable the beacon or cause the antenna to fall.\n\nThe old antenna must be replaced with P/N 070-0609-022 by 15 November 2007; thereafter the old part is forbidden and spares must be scrapped or returned, and post-flight checks are no longer required once replaced."},"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":"Amendment 2 retains the original and Amendment 1 requirements (post‑flight inspections, removal, replacement and prohibition of P/N 070-0609-021) but revises the compliance dates for Requirement 3 (replacement by new antenna) and Requirement 4 (prohibition/disposal of old spares) to 15 November 2007."},"complexity_factors":["Narrow applicability to AS365 N3 helicopters only and to a specific antenna part number (P/N 070-0609-021) (Applicability).","Layered compliance actions: repetitive post-flight inspections until replacement (Requirement 1), removal if damaged before next flight (Requirement 2), mandatory replacement by a deadline (Requirement 3), and prohibition on reinstalling old parts (Requirement 4).","Termination provision: installation of new P/N 070-0609-022 ends the post-flight inspection requirement (Requirement 3 note).","Delegation of inspection task to a ‘suitably trained pilot’ for Requirement 1 (Note 1), creating variable training/compliance burden across operators.","Supply-chain and maintenance impacts: need to procure P/N 070-0609-022 parts, discard or return old spares to Eurocopter (Requirement 4 and Background).","Multiple regulatory cross-references: Eurocopter ASB 05.00.53 (Revisions 1/2 or later) and EASA AD 2007-0224 R1 (Note 2), requiring operators to follow external service bulletin instructions and approved revisions.","Staggered and specific compliance deadlines (after each flight until replacement; before next flight if damaged; by 15 November 2007 for replacement; after 15 November 2007 for spare prohibition), increasing operational scheduling constraints.","Enforcement and disposal discretion: instructions to discard or return spares to Eurocopter impose an administrative/ logistical requirement on operators."],"plain_english_summary":"This directive requires AS365 N3 operators with CPT 609 antenna P/N 070-0609-021 to inspect the antenna after each flight until it is replaced by P/N 070-0609-022; damaged antennas must be removed before the next flight and old P/N 070-0609-021 spares must be discarded or returned to Eurocopter. Operators (or suitably trained pilots for the checks) pay for inspections, removal, replacement and disposal and must comply by 15 November 2007; the requirement responds to vibration-related mounting failures that reduce beacon radiated power."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-85-amdt-2-cpt-609-crash-position-transmitter-beacon-antenna","history":"/api/acts/ad-dauphin-85-amdt-2-cpt-609-crash-position-transmitter-beacon-antenna/history","analysis":"/api/acts/ad-dauphin-85-amdt-2-cpt-609-crash-position-transmitter-beacon-antenna/analysis","conflicts":"/api/acts/ad-dauphin-85-amdt-2-cpt-609-crash-position-transmitter-beacon-antenna/conflicts","importantCases":"/api/acts/ad-dauphin-85-amdt-2-cpt-609-crash-position-transmitter-beacon-antenna/important-cases","documents":"/api/acts/ad-dauphin-85-amdt-2-cpt-609-crash-position-transmitter-beacon-antenna/documents"}}