{"id":"F2008L01532","name":"AD/B767/241 - Forward and Aft Water Drain Masts","slug":"ad-b767-241-forward-and-aft-water-drain-masts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73580,"registerId":"commonwealth-F2008L01532-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 767 Series Aeroplanes","sectionType":"division","heading":"Boeing 767 Series Aeroplanes","content":"### Boeing 767 Series Aeroplanes\n\n| AD/B767/241 | Forward and Aft Water Drain Masts | 6/2008 |\n| ----------- | --------------------------------- | ------ |\n\n| Applicability: | Model 767-200, -300, -300F, and -400ER series aircraft; as identified in Boeing Special Attention Service Bulletins 767-30-0047 original issue, and 767-30-0048 original issue, or later FAA approved revisions.                                                                                                                                                                                             |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2008-08-26 Amdt 39-15480.                                                                                                                                                                                                                                                                                                                     |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of 5 June 2008.                                                                                                                                                                                                                                                                                                                      |\n|                | This Airworthiness Directive becomes effective on 5 June 2008.                                                                                                                                                                                                                                                                                                                                               |\n| Background:    | The FAA received a report of charred insulation blankets and burned wires around the forward grey water composite drain mast found during an inspection of the forward cargo compartment. The actions required by this Directive are intended to prevent a fire near a composite drain mast and possible disruption of the electrical power system caused by a lightning strike on the composite drain mast. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n23 April 2008","sortOrder":0},{"sectionNumber":"AD/B767/241","sectionType":"part","heading":"AD/B767/241","content":"## AD/B767/241","sortOrder":1},{"sectionNumber":"Forward and Aft Water Drain Masts","sectionType":"part","heading":"Forward and Aft Water Drain Masts","content":"## Forward and Aft Water Drain Masts","sortOrder":2},{"sectionNumber":"6/2008","sectionType":"part","heading":"6/2008","content":"## 6/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No. The Directive adopts the FAA AD's technical requirements for the identified Boeing 767 variants and references the Boeing service bulletins as the basis for applicability. The only domestic adjustment recorded in this text is a revised effective date of 5 June 2008 (Compliance)."},"complexity_factors":["Cross-reference to an external FAA airworthiness directive (Requirement) — requires operators to follow another regulator's technical text rather than standalone domestic detail.","Dependence on Boeing Special Attention Service Bulletins or later FAA‑approved revisions to identify affected serials and work scope (Applicability) — creates version-control and update uncertainty.","Technical nature of required actions (Background) — work likely requires qualified maintenance personnel, downtime and parts but the AD does not list step-by-step tasks itself.","Revised effective date requirement (Compliance) — imposes a specific compliance timeline that operators must meet.","Narrow aircraft-model scope (Applicability) — limits affected population but concentrates compliance on operators of those variants.","Enforcement and oversight by CASA (signed delegate) — regulatory monitoring and record-keeping obligations fall to operators."],"plain_english_summary":"Requires operators of Boeing 767-200, -300, -300F and -400ER aircraft to carry out the technical actions set out in FAA AD 2008-08-26 (as adopted by CASA) to address the forward and aft grey-water composite drain masts and reduce risk of fire or electrical disruption from a lightning strike (Requirement; Background). Operators must follow Boeing Special Attention Service Bulletins or later FAA‑approved revisions and comply by the revised effective date of 5 June 2008 (Applicability; Compliance). Operators pay for and arrange the work; CASA enforces the AD."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with a narrow, specific safety purpose. It addresses a discrete technical issue (lightning strike vulnerability on drain masts) for a defined aircraft fleet. There is no evidence of scope creep; it remains tightly focused on its original safety intent."},"complexity_factors":["Very short document (under 300 words)","Only 4 defined applicability criteria (specific aircraft models)","Single requirement: compliance with external FAA directive","No nested conditions or exceptions","No interpretive provisions or definitions section","Minimal cross-referencing (only to two Boeing service bulletins and one FAA AD)"],"plain_english_summary":"This AD mandates inspections and repairs of composite forward and aft water drain masts on certain Boeing 767-200/-300/-300F/-400ER aircraft (per Boeing SBs 767-30-0047/0048) because lightning strikes can ignite insulation/wiring near the cargo compartment, risking fire and electrical failure. It adopts FAA AD 2008-08-26 and requires compliance by the FAA-specified deadlines; it took effect 5 June 2008."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-241-forward-and-aft-water-drain-masts","history":"/api/acts/ad-b767-241-forward-and-aft-water-drain-masts/history","analysis":"/api/acts/ad-b767-241-forward-and-aft-water-drain-masts/analysis","conflicts":"/api/acts/ad-b767-241-forward-and-aft-water-drain-masts/conflicts","importantCases":"/api/acts/ad-b767-241-forward-and-aft-water-drain-masts/important-cases","documents":"/api/acts/ad-b767-241-forward-and-aft-water-drain-masts/documents"}}