{"id":"F2008L01246","name":"AD/B767/239 - Electrical Power Ground Brackets","slug":"ad-b767-239-electrical-power-ground-brackets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73484,"registerId":"commonwealth-F2008L01246-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/B767/239 | Electrical Power Ground Brackets | 5/2008 |\n| ----------- | -------------------------------- | ------ |\n\n| Applicability: | Model 767-200, -300, -300F and -400ER series aeroplanes, as identified in Boeing Alert Service Bulletin (ASB) 767-24A0162, dated 30 May 2006.                                                                                                                                                                                                                                                                                                                                                               |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Rework the existing ground stud bracket of the transformer rectifier units(TRU)/main battery charger (MBC), measure the resistance and install a new ground stud bracket of the TRUs by doing all the applicable actions specified in the Accomplishment Instructions of ASB 767-24A0162.                                                                                                                                                                                                                   |\n|                | Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2008-04-12, are considered acceptable for compliance with the equivalent Requirements of this Directive.                                                                                                                                                                                                                                         |\n|                | Note: FAA AD 2008-04-12 Amdt 39-15384 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| Compliance:    | Within 36 months after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Airworthiness Directive becomes effective on 8 May 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| Background:    | The work required by this Directive complements that already accomplished in accordance with AD/B767/203 (FAA AD 2004-23-14). The additional work is required to prevent depletion of the main battery while in flight, resulting from the loss of both TRUs and the MBC, together with consequent loss of all DC power. This loss of power could impact the safe flight and landing of the aeroplane due to the loss of function or malfunction of essential/critical systems and displays in the cockpit. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n7 March 2008","sortOrder":0},{"sectionNumber":"AD/B767/239","sectionType":"part","heading":"AD/B767/239","content":"## AD/B767/239","sortOrder":1},{"sectionNumber":"Electrical Power Ground Brackets","sectionType":"part","heading":"Electrical Power Ground Brackets","content":"## Electrical Power Ground Brackets","sortOrder":2},{"sectionNumber":"5/2008","sectionType":"part","heading":"5/2008","content":"## 5/2008","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":false,"description":"This AD maintains its original narrow scope — addressing a specific electrical grounding defect on Boeing 767 aircraft. The reference to prior directive AD/B767/203 and the explicit safety purpose (preventing dual TRU/battery charger failure) confirm the scope remains tightly focused on the identified airworthiness issue."},"complexity_factors":["Single, specific technical requirement with clear reference to external Boeing service bulletin","Only 4 aircraft models affected with explicit identification","Simple compliance timeline (36 months from effective date)","One conditional provision allowing FAA-approved alternative methods","Minimal defined terms (only standard aviation acronyms: TRU, MBC, ASB, AMOC, FAA)","No nested exceptions or complex conditional logic","Short document (approximately 250 words of substantive content)"],"plain_english_summary":"This AD mandates reworking or replacing a faulty ground stud bracket on transformer rectifier units and the main battery charger of Boeing 767-200/300/300F/400ER aircraft, verifying resistance per Boeing Alert Service Bulletin 767-24A0162. It targets operators/owners because the defect could cause simultaneous TRU and battery charger failure and total DC power loss in flight, risking critical cockpit systems. Compliance is required within 36 months of 8 May 2008; later FAA‑approved bulletin revisions may be used."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The Directive adds further mandatory maintenance actions that complement an earlier AD (AD/B767/203) but does not broaden the listed applicability beyond the Boeing models identified in ASB 767-24A0162. It requires additional work rather than changing which aircraft are covered; FAA‑approved later ASB revisions are accepted for compliance."},"complexity_factors":["Technical maintenance task: rework and replacement of TRU/MBC ground stud brackets and resistance measurement (Requirement).","Multiple aircraft models covered (767-200, -300, -300F, -400ER) increasing parts/maintenance planning complexity (Applicability).","Mandated compliance timeframe of 36 months creates scheduling and spare-parts procurement demands (Compliance).","Reference to an external Boeing Alert Service Bulletin (ASB 767-24A0162) means operators must follow manufacturer instructions and possible variations in revisions (Requirement).","Acceptance of later FAA-approved ASB revisions as an Alternate Method of Compliance introduces regulatory coordination across authorities (Requirement).","Connection to prior directive AD/B767/203 (FAA AD 2004-23-14) requires checking earlier work and records to ensure complementary actions (Background).","Safety-critical context: intended to prevent main battery depletion and total DC power loss, increasing inspection and documentation standards (Background)."],"plain_english_summary":"This Directive requires operators of Boeing 767-200, -300, -300F and -400ER aeroplanes identified in Boeing Alert Service Bulletin 767-24A0162 to rework the TRU/MBC ground stud bracket, measure resistance and install new ground stud brackets as specified in the ASB. Operators must comply within 36 months; later FAA‑approved revisions of the ASB are acceptable. The Directive is stated to prevent main battery depletion and total DC power loss in flight. Operators bear the maintenance cost; the Civil Aviation Safety Authority enforces compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-239-electrical-power-ground-brackets","history":"/api/acts/ad-b767-239-electrical-power-ground-brackets/history","analysis":"/api/acts/ad-b767-239-electrical-power-ground-brackets/analysis","conflicts":"/api/acts/ad-b767-239-electrical-power-ground-brackets/conflicts","importantCases":"/api/acts/ad-b767-239-electrical-power-ground-brackets/important-cases","documents":"/api/acts/ad-b767-239-electrical-power-ground-brackets/documents"}}