{"id":"F2006L02226","name":"AD/DHC-8/101 Amdt 1 - Fire Bottle Electrical Connectors","slug":"ad-dhc-8-101-amdt-1-fire-bottle-electrical-connectors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117553,"registerId":"commonwealth-F2006L02226-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier (Boeing Canada/De Havilland) ","sectionType":"division","heading":"Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes","content":"### Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes\n\n| AD/DHC-8/101 Amdt 1 | Fire Bottle Electrical Connectors | 8/2006 |\n| ------------------- | --------------------------------- | ------ |\n\n| Applicability: | Models DHC-8-400, DHC-8-401 and DHC-8-402, Serial Numbers (S/N) 4001 through 4107 inclusive. |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. For DHC-8-400, DHC-8-401 and DHC-8-402, S/N 4001 through 4105 inclusive - Carry out an inspection of the electrical connectors on the forward and aft baggage compartment, auxiliary power unit (APU) and engine nacelle fire bottles, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin (ASB) A84-26-06, dated 12 May 2005, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. |\n| | 2. Correct any deficiencies noted during the Requirement 1 inspection in accordance with the Accomplishment Instructions of ASB A84-26-06. |\n| | Note 1: The Bombardier Aircraft maintenance Manual PSM 1-84-2 has been amended to clarify the instructions for connection of fire bottle connectors. Temporary Revisions (TR) 26-017 through 26-027 were issued accordingly. |\n| | 3. For DHC-8-400, DHC-8-401 and DHC-8-402, S/N 4001 through 4107 inclusive - Install and/or modify lanyards, mounts and clamps to the forward and aft baggage compartment, APU and engine nacelle fire extinguishing systems by incorporating Modsum 4-109941. Bombardier Service Bulletin (SB) 84-26-07, Revision A, dated 21 February 2006, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada, provides approved instructions for incorporating Modsum 4-109941. |\n| | Previous incorporation of Modsum 4-109941 before the effective date of this Amendment, in accordance with the Accomplishment Instructions in the original issue of Bombardier Service Bulletin 84-26-07, dated 15 June 2005, is acceptable for compliance with Requirement 3. |\n| | Note 2: Transport Canada AD CF-2005-14R1 refers. |\n| Compliance: | For Requirement 1 - Remains unchanged as “Within 14 days after the effective date of the original issue of this Directive”. |\n\n| | For Requirement 2 - Before further flight after accomplishing the Requirement 1 inspection. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | For Requirement 3 - Within 5000 hours time in service after the effective date of this Amendment. |\n| | This Amendment becomes effective on 3 August 2006. |\n| Background: | Transport Canada has received three reports of crossed connection of the electrical connectors on the forward and aft baggage compartment fire bottles. An investigation has revealed that a similar unsafe condition could also potentially exist for the APU and engine nacelle fire bottles. Cross connection of the fire bottle connectors could result in the inability to control a fire in the affected area.The original issue of this Directive required an inspection of the fire bottle connectors to ensure that they were not cross connected and, if necessary, rectification of any incorrect installation.This Amendment requires the installation or modification of lanyards, mounts and clamps to ensure fire bottle electrical connectors cannot be cross connected.The original issue of this Directive became effective on 7 July 2005. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n21 June 2006","sortOrder":0},{"sectionNumber":"AD/DHC-8/101 Amdt 1","sectionType":"part","heading":"AD/DHC-8/101 Amdt 1","content":"## AD/DHC-8/101 Amdt 1","sortOrder":1},{"sectionNumber":"Fire Bottle Electrical Connectors","sectionType":"part","heading":"Fire Bottle Electrical Connectors","content":"## Fire Bottle Electrical Connectors","sortOrder":2},{"sectionNumber":"8/2006","sectionType":"part","heading":"8/2006","content":"## 8/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is an amendment to an existing Airworthiness Directive. The original directive (effective July 2005) required inspections and corrections. This Amendment 1 adds a permanent preventive fix (the lanyards/mounts/clamps) while maintaining the original inspection requirements. The scope has not expanded beyond addressing the same safety issue (fire bottle connector cross-connection) on the same aircraft models; it has simply added a mandatory preventive modification to the existing corrective inspection regime."},"complexity_factors":["Multiple serial number ranges with different requirements (4001–4105 vs 4001–4107)","Three distinct compliance deadlines with cross-references to original and amended directive dates","References to external technical documents (Bombardier Alert Service Bulletin A84-26-06, Service Bulletin 84-26-07 Revision A, Modsum 4-109941)","Conditional acceptance of prior work (previous incorporation of Modsum 4-109941 under earlier bulletin version deemed acceptable)","Nested applicability: Requirement 1 applies to subset of aircraft, Requirement 3 applies to broader set"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of specified Bombardier DHC-8-400 (Q400) aircraft to correct a hazardous wiring issue in fire extinguisher bottle connectors that can lead to cross-connection and failure of fire suppression. Affected operators must inspect and repair any incorrect connections and install physical measures to prevent re-connection errors. It’s a mandatory safety action for Australian operators to ensure fire systems will function in an emergency."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. The Amendment extends the original inspection-and-rectification requirement by mandating physical modifications (installation/modification of lanyards, mounts and clamps per Modsum 4‑109941) to prevent cross‑connection, and it broadens the modification applicability to S/N 4001–4107 (Requirement 1 applies to S/N 4001–4105; Requirement 3 applies to S/N 4001–4107). It also recognises prior compliant installations and relies on approved revisions of Bombardier service documents (Requirement 3; Background)."},"complexity_factors":["Aircraft- and serial-number-specific applicability (Models DHC‑8‑400/401/402; S/N 4001–4107) — narrows affected fleet and creates per-aircraft compliance tracking (Applicability).","Three distinct mandatory actions with different deadlines: inspection within 14 days (Requirement 1; Compliance), corrective action before further flight (Requirement 2), and modification within 5,000 hours TIS (Requirement 3; Compliance) — staged compliance timing raises scheduling and operational planning complexity.","Reliance on manufacturer documents (Bombardier ASB A84‑26‑06 and SB 84‑26‑07) and Modsum 4‑109941 for the technical means of compliance, with later revisions requiring approval by the Chief, Continuing Airworthiness, Transport Canada — creates dependence on external service documents and regulator approvals (Requirement 1, Requirement 3).","Acceptance of prior incorporation of Modsum 4‑109941 if done to the original SB (15 June 2005) — requires verification of historical maintenance records to confirm compliance (Requirement 3).","Amendment expands the remedy from inspection/rectification to mandatory hardware changes (installation/modification of lanyards, mounts and clamps) — changes scope of work and increases material/labour costs (Background; Requirement 3).","Cross-reference to Transport Canada AD CF‑2005‑14R1 and requirement for Transport Canada approval of revisions — adds cross-jurisdictional or inter-authority coordination in interpreting acceptable revisions (Note 2; Requirement 1, Requirement 3).","Immediate safety-triggered action based on reported incidents (three reports of crossed connections) — short compliance windows and potential for aircraft downtime until rectified (Background; Compliance)."],"plain_english_summary":"This Directive requires operators of Bombardier DHC‑8‑400/401/402 aeroplanes (S/N 4001–4107) to inspect electrical connectors for fire bottles in baggage compartments, the APU and engine nacelles, fix any incorrect connections, and install or modify lanyards, mounts and clamps per Bombardier service instructions (Modsum 4‑109941). It addresses reports of crossed connections that could prevent fire‑extinguishing control and imposes near‑term inspection/repair work plus a later hardware modification to reduce that risk."},"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-dhc-8-101-amdt-1-fire-bottle-electrical-connectors","history":"/api/acts/ad-dhc-8-101-amdt-1-fire-bottle-electrical-connectors/history","analysis":"/api/acts/ad-dhc-8-101-amdt-1-fire-bottle-electrical-connectors/analysis","conflicts":"/api/acts/ad-dhc-8-101-amdt-1-fire-bottle-electrical-connectors/conflicts","importantCases":"/api/acts/ad-dhc-8-101-amdt-1-fire-bottle-electrical-connectors/important-cases","documents":"/api/acts/ad-dhc-8-101-amdt-1-fire-bottle-electrical-connectors/documents"}}