{"id":"F2006L01839","name":"AD/AS 355/87 Amdt 1 - Untimely Firing of Squibs","slug":"ad-as-355-87-amdt-1-untimely-firing-of-squibs","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":59653,"registerId":"commonwealth-F2006L01839-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 355 (Twin Ecureuil) Series","sectionType":"division","heading":"Eurocopter AS 355 (Twin Ecureuil) Series Helicopters","content":"### Eurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\n| AD/AS 355/87 Amdt 1 | Untimely Firing of Squibs | 8/2006 DM |\n| ------------------- | ------------------------- | --------- |\n\n| Applicability: | AS 355 E, F, F1, F2 and N helicopters equipped as follows:                                                                                                                                                                                                                               |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|                | Goodrich electric hoists 76370-XXX, (all types of motors) and not modified per MOD 073318 (or per Eurocopter AS 355 Alert Service Bulletin (ASB) 25.00.85 issued 16 November 2005); or                                                                                                   |\n|                | Goodrich electric hoists 76370-XXX, not fitted with the Auxilec motor.                                                                                                                                                                                                                   |\n| Requirement:   | 1. If not previously accomplished, deactivate the squib and affix placards in the cockpit and in the cabin near the hoist operator in accordance with paragraph 2.B. of Eurocopter Alert Telex (AT) 25.00.84 dated 25 May 2005 (Eurocopter AS 355 ASB 25.00.84 issued 16 November 2005). |\n|                | 2. If not previously accomplished, comply with the operating instructions specified in paragraph 2.D. of AT 25.00.84 (AS 355 ASB 25.00.84).                                                                                                                                              |\n|                | 3. Comply with the operating instructions specified in paragraph 2.B. of AT 25.00.84 (AS 355 ASB 25.00.84).                                                                                                                                                                              |\n|                | 4. Modify the hoist electrical wiring by eliminating the ground from the hoist squib as specified in paragraph 2.B. of AS355 ASB 25.00.85 issued 16 November 2005.                                                                                                                       |\n|                | Later revisions of the above service bulletins approved by the European Aviation Safety Agency (EASA) may be utilised for compliance with the applicable requirements of this Directive.                                                                                                 |\n|                | Note: EASA AD 2006-0164 refers.                                                                                                                                                                                                                                                          |\n| Compliance:    | For Requirement 1 - Before the next hoisting operation.                                                                                                                                                                                                                                  |\n|                | For Requirement 2 - Immediately following Requirement 1.                                                                                                                                                                                                                                 |\n|                | For Requirement 3 - Prior to installing a hoist.                                                                                                                                                                                                                                         |\n\n|             | For Requirement 4 - Within 30 days after the effective date of this Directive or before installation of an unmodified hoist on a helicopter.                                                                                                                                                                                                |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | This Amendment becomes effective on 28 June 2006.                                                                                                                                                                                                                                                                                           |\n| Background: | The French Direction de L’Aviation Civile has advised of the discovery of a potential risk of untimely squib firing which would cause the cable to be cut. Consequently, the original issue of this Directive required the squib function to be inhibited, the manual cable cutter to be operated and operational procedures to be adapted. |\n|             | This Amendment, whilst continuing the requirements of the original issue of this Directive restricts the applicability after the embodiment of MOD 073318 and, at the same time renders mandatory the modification on other helicopters. The Amendment also amends a typographical error in the number of the alert telex.                  |\n|             | The original issue of this Directive became effective on 2 June 2005.                                                                                                                                                                                                                                                                       |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n14 June 2006","sortOrder":0},{"sectionNumber":"AD/AS 355/87 Amdt 1","sectionType":"part","heading":"AD/AS 355/87 Amdt 1","content":"## AD/AS 355/87 Amdt 1","sortOrder":1},{"sectionNumber":"Untimely Firing of Squibs","sectionType":"part","heading":"Untimely Firing of Squibs","content":"## Untimely Firing of Squibs","sortOrder":2},{"sectionNumber":"8/2006 DM","sectionType":"part","heading":"8/2006 DM","content":"## 8/2006 DM","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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"This is Amendment 1 to an existing directive. The original directive (effective 2 June 2005) applied more broadly and required manual cable cutter operation. This amendment narrows applicability to exclude helicopters already modified per MOD 073318, while simultaneously expanding the mandate to require wiring modifications on other affected helicopters. It also corrects a typographical error in the referenced alert telex number. The scope has shifted from a blanket prohibition to a more targeted technical fix with graduated compliance requirements."},"complexity_factors":["Short, single-purpose directive focused on one specific mechanical fault","Only 4 distinct requirements with clear sequential dependencies","Applicability determined by two specific equipment configurations (hoist model numbers and modification status)","References to external technical documents (Eurocopter Alert Telexes and Service Bulletins) without reproducing their full content","Simple conditional logic: 'if not previously accomplished' appears twice, otherwise requirements are absolute","No defined terms section — technical terms (squib, Auxilec motor, MOD 073318) assume industry knowledge","Cross-reference to European Aviation Safety Agency (EASA) AD 2006-0164 for context but not for compliance"],"plain_english_summary":"This CASA Airworthiness Directive targets Eurocopter AS355 helicopters fitted with specified Goodrich electric hoists where the hoist squib can fire unexpectedly, risking the emergency cable cutter operating and dropping a load or person. It requires operators to disable the squib, place warning labels, adopt revised hoist procedures, and modify squib wiring within the stated deadlines. Compliance is mandatory for affected owners/operators."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"The Amendment narrows applicability by excluding hoists after embodiment of MOD 073318 while simultaneously making the wiring modification mandatory for other helicopters; it also corrects a typographical error in the referenced alert telex (Background)."},"complexity_factors":["Technical retrofit: requires an electrical wiring modification to eliminate the hoist squib ground (Requirement 4) — needs certified maintenance, parts and testing.","Time‑sensitive operational constraints: squib deactivation and placarding must be done before the next hoisting operation (Requirement 1; Compliance), potentially interrupting normal use.","Multiple concurrent actions with staggered deadlines: deactivation/placards, immediate operating‑instruction compliance, pre‑installation checks, and a 30‑day modification window (Requirements 1–4; Compliance).","Applicability nuance: only AS 355 E/F/F1/F2/N with specified Goodrich hoists are covered; hoists modified by MOD 073318 or fitted with the Auxilec motor are excluded (Applicability), requiring operator verification.","Dependence on external service documents: compliance refers to Eurocopter Alert Telex/Service Bulletin text and permits later EASA‑approved revisions for conformity (Requirements), imposing document‑management and interpretation tasks.","Economic and scheduling burden falls on owners/operators: they must fund, schedule and implement placarding, training/procedure changes and the wiring modification (Requirements/Compliance).","Limited regulatory discretion: prescriptive mandatory steps are set, but acceptance of later EASA‑approved revisions introduces a defined avenue for updated compliance (Requirements)."],"plain_english_summary":"Requires operators of AS 355 E/F/F1/F2/N helicopters fitted with certain Goodrich electric hoists to deactivate the hoist squib, affix cockpit/cabin placards, follow updated operating instructions, and modify hoist wiring to remove the squib ground within specified timeframes. It affects helicopter owners/operators who must arrange and pay for placarding, procedure changes and an electrical wiring modification; the amendment narrows applicability for hoists already modified by MOD 073318 and makes the wiring change mandatory for others."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-87-amdt-1-untimely-firing-of-squibs","history":"/api/acts/ad-as-355-87-amdt-1-untimely-firing-of-squibs/history","analysis":"/api/acts/ad-as-355-87-amdt-1-untimely-firing-of-squibs/analysis","conflicts":"/api/acts/ad-as-355-87-amdt-1-untimely-firing-of-squibs/conflicts","importantCases":"/api/acts/ad-as-355-87-amdt-1-untimely-firing-of-squibs/important-cases","documents":"/api/acts/ad-as-355-87-amdt-1-untimely-firing-of-squibs/documents"}}