{"id":"F2006B10242","name":"AD/GAZELLE/23 Amdt 1 - Electric Hoist - Pyrotechnic Squib","slug":"ad-gazelle-23-amdt-1-electric-hoist-pyrotechnic-squib","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55900,"registerId":"commonwealth-F2006B10242-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAZELLE/23 Amdt 1 - Electric Hoist - Pyrotechnic Squib","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\n \n\n![](image.001.png)\n\n![](image.001.png)  AIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/GAZELLE/23 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\n\n \n\nEurocopter SA341 and SA342 (Gazelle) Series Helicopters\n\n \n\nAD/GAZELLE/23\n\nAmdt 1\n\n\nElectric Hoist - Pyrotechnic Squib 8/2004\n\n \n\n \n\nApplicability: SA 341 G or SA 342 J helicopters equipped with a 136kg (300 lb) emergency electric hoists, with part numbers (P/N) as follows, fitted with a junction box P/N 341A63- 1103-00:\n\n \n\n# Hoist Manufacturer\n\n \n\nBreeze\n\n \n\nTRW (or Lucas or Air Equipment)\n\n# Part Number\n\n \n\nBL 16-600, BL 16-600-11 and BL 16-600-12\n\n \n\n76-370, 76-370-010 and 76-370-011\n\n \n\nRequirement:  Modify the junction box in accordance with paragraph 2.B. of either Eurocopter SA 341/342 Alert Telex 45.05 or Eurocopter SA 341/342 Alert Service Bulletin 45.05.\n\n \n\nNote: DGAC AD F-2002-370-043 R1 refers.\n\n \n\nCompliance: For helicopters equipped with Breeze hoists - Remains unchanged as ‘Before the next flight with hoisting operations’.\n\n \n\nFor helicopters equipped with TRW (or Lucas or Air Equipment) hoists - Remains unchanged as ‘Within 12 months from the effective date of the original issue of this Directive or within 550 hours time in service after the effective date of the original issue of this directive, whichever occurs first; or before replacing a TRW (or Lucas or Air Equipment) hoist with a Breeze hoist’.\n\n \n\nFor helicopters fitted with any of the affected hoists - Remains unchanged as ‘Before installing or replacing a junction box with P/N 341A63-1103-00’.\n\n \n\nThis Amendment becomes effective on 5 August 2004.\n\n \n\nBackground: The French Direction Générale de L’Aviation Civile has advised that the electric hoist load jettison control system may not operate due to insufficient current to activate the pyrotechnic squib on Breeze hoist installations but is sufficient to operate squibs in TRW (or Lucas or Air Equipment) installations.\n\n# Eurocopter SA341 and SA342 (Gazelle) Series Helicopters\n\n \n\nAD/GAZELLE/23 Amdt 1 (continued)\n\n \n\nThe original issue of this Directive required modification of the hoist installation common electrical control circuitry.\n\n \n\nThis Amendment has no effect other than to record the conversion of the alert telex to an alert service bulletin.\n\n \n\nThe original issue of this Airworthiness Directive became effective on 12 July 2002.\n\n![Signature of James Coyne](image.002.png)  \n\n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 23 June 2004\n\n \n\n![](image.001.png)  \n\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 July 2004.\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment did not change the substantive scope or requirements of the original AD. The AD still requires the same junction-box modification for the same helicopter and hoist part numbers and retains the same compliance times. The amendment merely records that the manufacturer’s instruction was reissued as an Alert Service Bulletin rather than an Alert Telex; the AD text states explicitly that it has \"no effect other than to record the conversion.\""},"complexity_factors":["Short, single-issue directive focused on one modification","Three affected hoist part-number groups and one junction-box part number to identify applicability","Different compliance windows depending on hoist manufacturer (Breeze vs TRW/Lucas/Air Equipment)","Requirement cross-references a specific paragraph (2.B.) in external Eurocopter documents (Alert Telex or Alert Service Bulletin 45.05)","References to an external foreign AD (DGAC AD F-2002-370-043 R1)","Amendment only updates the form of the manufacturer communication (Telex → Service Bulletin) rather than changing substantive obligations"],"plain_english_summary":"**What this airworthiness directive (AD) does, in plain English**\n\n- **What it requires:** Operators must modify the electric hoist junction box on specified Gazelle helicopters so the pyrotechnic squib (the explosive device used to jettison a load in an emergency) will receive sufficient current to fire when required. The AD tells operators to do the modification exactly as described in paragraph 2.B of the Eurocopter service instruction referenced (either the Alert Telex or the Alert Service Bulletin 45.05).\n\n- **Which aircraft and equipment are affected:** SA 341 G or SA 342 J (Gazelle) helicopters that have a 136 kg (300 lb) emergency electric hoist of the following part numbers and that are fitted with junction box P/N 341A63-1103-00:\n  - Breeze hoists: P/N BL 16-600, BL 16-600-11, BL 16-600-12\n  - TRW / Lucas / Air Equipment hoists: P/N 76-370, 76-370-010, 76-370-011\n\n- **When it must be done (compliance):**\n  - For helicopters with Breeze hoists: the modification must be done before the next flight that involves hoisting operations.\n  - For helicopters with TRW (or Lucas or Air Equipment) hoists: the modification must be done within 12 months of the original AD’s effective date or within 550 hours time-in-service after that date, whichever comes first; or before replacing a TRW/Lucas/Air Equipment hoist with a Breeze hoist.\n  - For any helicopter where someone intends to install or replace a junction box with P/N 341A63-1103-00: the modification must be done before that installation.\n\n- **Why the rule exists (official rationale):** French aviation authorities reported that on Breeze hoist installations the electrical control may not deliver enough current to activate the pyrotechnic squib. If the squib doesn’t fire, the load-jettison function can fail. The AD directs a wiring/modification change to ensure adequate current to the squib.\n\n- **What changed in this amendment:** The Amendment records a documentation change — the manufacturer’s item was converted from an Alert Telex to an Alert Service Bulletin. The AD says this amendment does not change the technical requirement or compliance times; it only records that the information source has been reissued in Service Bulletin form.\n\nPractical steps for affected operators\n\n1. Check whether your helicopter is an SA 341 G or SA 342 J and whether the installed hoist and junction box match the part numbers above.\n2. Obtain Eurocopter SA 341/342 Alert Service Bulletin 45.05 (or the earlier Alert Telex 45.05) and follow paragraph 2.B precisely to modify the junction box/wiring.\n3. Schedule the modification according to the compliance time applicable to your hoist type (Breeze vs TRW/etc.), and ensure the work is recorded in maintenance logs before further hoisting operations.\n\nCosts, incentives and implementation considerations (analyst notes)\n\n- Who pays: The helicopter operator pays for parts, labour and downtime to perform the modification. There is no grant of funding in the AD.\n- Who decides and who can do the work: The AD mandates the modification; certified maintenance organisations or suitably authorised engineers who can apply the Eurocopter instructions should be able to perform the work. Operators can choose their maintenance provider subject to regulatory approvals and contractual arrangements.\n- Effect on private firms: The requirement creates demand for maintenance labour and parts; vendors that supply the junction-box modification or authorised maintenance services may capture that demand. Independent maintenance shops capable of following the Eurocopter procedure can compete for the work.\n- Trade-offs and risks: The AD trades a modest compliance cost (parts, labour and aircraft downtime) for reduced risk of load-jettison failure. Implementation risk rests on correct application of the Eurocopter modification procedure and verifying electrical current after modification.\n- Substitution effects: The compliance timing differs by hoist manufacturer; replacing a TRW-type hoist with a Breeze hoist triggers an earlier compliance requirement (i.e., you must have the modification in place before or when that replacement occurs).\n- Administrative burden: Operators must obtain the referenced Eurocopter document and keep records proving compliance in the aircraft maintenance log. The amendment’s conversion from Telex to Service Bulletin simplifies reference to a formal service bulletin but does not alter operator obligations.\n\nSource and scope statement\n\n- The AD is an airworthiness directive (a mandatory safety instruction issued by the aviation safety regulator) requiring a specific modification to correct an identified unsafe condition in the hoist electrical circuit. The amendment notes only a documentation reissue (Telex → Service Bulletin) and explicitly says it does not change the technical requirement or compliance times."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment explicitly states it has 'no effect other than to record the conversion of the alert telex to an alert service bulletin.' The scope remains limited to the specific hoist junction box modification originally mandated in 2002."},"complexity_factors":["Multiple manufacturer variants (Breeze vs TRW/Lucas/Air Equipment) with different compliance timeframes","Cross-reference to French aviation authority (DGAC) directive F-2002-370-043 R1","Reference to external technical documents (Eurocopter Alert Telex 45.05 and Alert Service Bulletin 45.05) which are not reproduced in the directive","Three separate compliance conditions depending on equipment configuration and maintenance activity","Nested timing calculations involving 'effective date of original issue' (12 July 2002) versus amendment effective date (5 August 2004)"],"plain_english_summary":"This AD affects SA341/SA342 Gazelle helicopters fitted with Breeze or TRW/Lucas/Air Equipment emergency electric hoists. Investigations found the Breeze hoist’s pyrotechnic load‑release squib may not get enough electrical current to operate, so the hoist’s junction box must be modified per Eurocopter Alert Service Bulletin 45.05.\n\nBreeze‑equipped aircraft must comply before the next hoist operation; TRW‑equipped aircraft within 12 months or 550 flight hours. This amendment only updates the service‑bulletin reference."},"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-gazelle-23-amdt-1-electric-hoist-pyrotechnic-squib","history":"/api/acts/ad-gazelle-23-amdt-1-electric-hoist-pyrotechnic-squib/history","analysis":"/api/acts/ad-gazelle-23-amdt-1-electric-hoist-pyrotechnic-squib/analysis","conflicts":"/api/acts/ad-gazelle-23-amdt-1-electric-hoist-pyrotechnic-squib/conflicts","importantCases":"/api/acts/ad-gazelle-23-amdt-1-electric-hoist-pyrotechnic-squib/important-cases","documents":"/api/acts/ad-gazelle-23-amdt-1-electric-hoist-pyrotechnic-squib/documents"}}