{"id":"F2006B07103","name":"AD/S-PUMA/26 - Single Pole Circuit Breaker","slug":"ad-s-puma-26-single-pole-circuit-breaker","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48885,"registerId":"commonwealth-F2006B07103-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/S-PUMA/26 - Single Pole Circuit Breaker","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nEurocopter AS 332 (Super Puma) Series Helicopters\n\nAD/S-PUMA/26 Single Pole Circuit Breaker 12/97\n\nApplicability: All Eurocopter AS 332 C, C1, L and L1 helicopters fitted with single pole circuit breakers manufactured by CROUZET bearing the following part numbers:\n\n| 1   | Amp. : | 84 400 028 | 7.5 | Amp. : | 84 400 033 |\n| --- | ------ | ---------- | --- | ------ | ---------- |\n| 2   | Amp. : | 84 400 029 | 10  | Amp. : | 84 400 034 |\n| 2.5 | Amp. : | 84 400 030 | 15  | Amp. : | 84 400 035 |\n| 3   | Amp. : | 84 400 031 | 20  | Amp. : | 84 400 036 |\n| 5   | Amp. : | 84 400 032 | 25  | Amp. : | 84 400 037 |\n\nNote: The aircraft primarily affected are those delivered new between 24 April 1995 and 31 August 1996, however other aircraft are affected if the circuit breakers have been replaced since 24 April 1995.\n\nRequirement: 1. Check all circuit breakers with part numbers 84 400 XXX that are fitted to installations listed in paragraph 1D1 of EUROCOPTER AS 332 Service Bulletin (SB) No. 01.00.49 dated 30 June 1997.\n\n    2. Apply the procedure detailed in paragraph 2B of the SB to all the circuit breakers for the remaining installations.\n\n    3. Test each circuit breaker held as a spare and bearing a part number listed in this airworthiness directive by applying a torque load and checking the circuit breaker in accordance with the directives given in paragraphs 2B(1) and 2B(2) of the SB.\n\n    4. The use of the circuit breakers bearing the part numbers listed in this Airworthiness Directive is prohibited.\n\nNote: DGAC AD 97-202-062 (AB) refers.\n\nCompliance: 1. Within 100 hours time in service but no later than 6 February 1998.\n\n    2. Within 500 hours time in service but no later than 6 May 1998.\n\n    3. Prior to, and after, installation.\n\n    4. From 31 December 1999.\n\nThis airworthiness directive becomes effective on 6 November 1997.\n\nBackground: This AD is issued to check for any loss of electrical continuity for single-pole circuit breakers bearing the part numbers listed. During testing by the OEM a loss of electrical continuity was discovered between the terminals of the circuit breaker in the engaged position. This loss was found to be due to deterioration of the circuit breaker operation brought about by excessive torque loading during installation.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive targets the CROUZET part numbers listed and installations described in the referenced Service Bulletin; it primarily affects aircraft delivered 24 April 1995–31 August 1996 but expressly extends to any airframe that had those breakers replaced after 24 April 1995 (Applicability; Note). The text shows no alteration of that scope."},"complexity_factors":["Targeted parts list and affected airframes is specific (Applicability; Note).","Procedural details and pass/fail criteria are delegated to an external document: EUROCOPTER AS 332 Service Bulletin No. 01.00.49 (Requirement 1–3).","Multiple staged compliance deadlines with both flight-hour and calendar limits create scheduling complexity (Compliance paragraphs 1–3).","A full prohibition on use of listed parts from a future date imposes replacement/retirement costs (Requirement 4; Compliance).","Spare‑parts testing required prior to and after installation increases logistics and testing burden (Requirement 3; Compliance).","Identification burden: operators must check installations listed in paragraph 1D1 of the SB to determine applicability (Requirement 1).","Safety mechanism is technical (preventing loss of electrical continuity due to excessive torque) and rests on OEM test findings (Background)."],"plain_english_summary":"This Airworthiness Directive requires operators of Eurocopter AS 332 C/C1/L/L1 helicopters to inspect, test and remove certain CROUZET single‑pole circuit breakers (P/Ns 84 400 028–037) per Eurocopter Service Bulletin No. 01.00.49. It mandates torque checks, testing of spares, and bans continued use of the listed breakers from 31 December 1999.\n\nOperators pay compliance costs and must change maintenance practices and spare‑parts handling; the measures aim to prevent loss of electrical continuity caused by deterioration from excessive installation torque (Background). Deadlines and procedures appear in the Requirement and Compliance paragraphs."},"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":false,"description":"This is a standard airworthiness directive with a focused, single-issue scope (defective circuit breakers). It has not expanded beyond its original safety purpose."},"complexity_factors":["Short, single-purpose directive with clear applicability criteria","Only 10 specific part numbers listed in a simple table format","Four numbered requirements with straightforward compliance deadlines","Single cross-reference to a Eurocopter Service Bulletin (SB 01.00.49)","No nested definitions or conditional logic beyond the applicability criteria","Background section provides clear rationale for the safety action"],"plain_english_summary":"CASA has issued a mandatory Airworthiness Directive for Eurocopter AS332 Super Puma helicopters fitted with Crouzet single‑pole circuit breakers that can lose electrical continuity from over‑tightening. It requires targeted inspections, a special procedure for some installations, testing of spare breakers before use, and ultimately bans the affected breakers.\n\nThis affects owners/operators of AS332 C, C1, L and L1 helicopters delivered Apr 1995–Aug 1996 or fitted with those breakers since Apr 1995, because faulty breakers can cause in‑flight electrical failures of critical systems."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-puma-26-single-pole-circuit-breaker","history":"/api/acts/ad-s-puma-26-single-pole-circuit-breaker/history","analysis":"/api/acts/ad-s-puma-26-single-pole-circuit-breaker/analysis","conflicts":"/api/acts/ad-s-puma-26-single-pole-circuit-breaker/conflicts","importantCases":"/api/acts/ad-s-puma-26-single-pole-circuit-breaker/important-cases","documents":"/api/acts/ad-s-puma-26-single-pole-circuit-breaker/documents"}}