{"id":"F2006L00440","name":"AD/DHC-8/110 - Outer Wing Fuel Access Panel","slug":"ad-dhc-8-110-outer-wing-fuel-access-panel","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117125,"registerId":"commonwealth-F2006L00440-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-8/110 | Outer Wing Fuel Access Panel | 3/2006 |\n| ------------ | ---------------------------- | ------ |\n\n| Applicability: | Model DHC-8-400, DHC-8-401, and DHC-8-402 aircraft, serial numbers 4001, and 4003 through 4106.                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Transport Canada AD CF-2005-37.Note: Bombardier Service Bulletin 84-57-13 original issue, or later Transport Canada approved revision, refers.                                                                                                                                                                                                                                                                 |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of16 March 2006.                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                                                                                                                                         |\n| Background:    | The manufacturer has received numerous reports of cracks on part number85714230-001 outer wing fuel access panels. These were found during routine maintenance checks. Investigation revealed that certain fuel access panels were manufactured with seal grooves having sharp corner radii. This condition, if not corrected, could result in arcing and ignition of fuel vapour in the outer wing fuel tank during a lightning strike. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n3 February 2006","sortOrder":0},{"sectionNumber":"AD/DHC-8/110","sectionType":"part","heading":"AD/DHC-8/110","content":"## AD/DHC-8/110","sortOrder":1},{"sectionNumber":"Outer Wing Fuel Access Panel","sectionType":"part","heading":"Outer Wing Fuel Access Panel","content":"## Outer Wing Fuel Access Panel","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive addressing a specific safety defect. It has not expanded beyond its original purpose of mandating repairs to faulty fuel access panels on specific aircraft."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined applicability criteria (specific aircraft models and serial numbers)","Single requirement referencing external technical documents rather than containing detailed instructions","No nested conditions, exceptions, or cross-references to other legislation","Straightforward compliance date with no alternative methods or phased implementation"],"plain_english_summary":"This AD requires owners/operators of Bombardier DHC-8-400 (Q400/Dash 8-400) serials 4001 and 4003–4106 to inspect and repair outer wing fuel access panels per Transport Canada AD CF-2005-37 and Bombardier SB 84‑57‑13. The fix addresses sharp seal‑groove corners that can cause lightning‑induced arcing and ignite fuel vapour. Compliance was mandatory from 16 March 2006; the directive is legally binding."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope was not expanded or narrowed in substance: the AD keeps the same applicability (Model DHC-8-400/401/402, serials 4001 and 4003–4106) and requires compliance with Transport Canada AD CF-2005-37. The only procedural change noted is a revised effective date of 16 March 2006; required actions remain those specified in the referenced AD and service bulletin."},"complexity_factors":["Cross-reference to an external mandatory document (Transport Canada AD CF-2005-37) — requires operators to obtain and follow another regulator's AD.","Narrow serial-number applicability (serials 4001, 4003–4106) — requires fleet-specific tracking.","Technical inspection and repair work (detecting cracks, addressing seal-groove radii) — requires maintenance/engineering capability and parts/skills.","Reliance on manufacturer service bulletin (Bombardier Service Bulletin 84-57-13) or later approved revision — potential need for approved revisions or alternate methods.","Revised effective date (16 March 2006) — administrative timing change that affects compliance scheduling."],"plain_english_summary":"This Airworthiness Directive requires operators of Bombardier DHC-8-400 series aeroplanes (serials 4001 and 4003–4106) to follow Transport Canada AD CF-2005-37 — mandating inspection and any corrective action on the outer wing fuel access panels, effective 16 March 2006. The directive responds to reported cracks where sharp seal-groove radii can allow arcing and possible ignition of fuel vapour during a lightning strike. Operators are responsible for inspection and repair costs and must adjust maintenance practices to eliminate the defect."},"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-8-110-outer-wing-fuel-access-panel","history":"/api/acts/ad-dhc-8-110-outer-wing-fuel-access-panel/history","analysis":"/api/acts/ad-dhc-8-110-outer-wing-fuel-access-panel/analysis","conflicts":"/api/acts/ad-dhc-8-110-outer-wing-fuel-access-panel/conflicts","importantCases":"/api/acts/ad-dhc-8-110-outer-wing-fuel-access-panel/important-cases","documents":"/api/acts/ad-dhc-8-110-outer-wing-fuel-access-panel/documents"}}