{"id":"F2006B03427","name":"AD/B767/72 - Static Inverter Replacement","slug":"ad-b767-72-static-inverter-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42968,"registerId":"commonwealth-F2006B03427-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/72 - Static Inverter Replacement","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)  \nBoeing 767 Series Aeroplanes\n\nAD/B767/72 Static Inverter Replacement 10/93\n\nApplicability: All model 767 series aircraft identified in Boeing Alert Service Bulletin 767-24A0085 dated 17 September 1992.\n\nRequirement: 1. Inspect the static inverter to determine the part number in accordance with Boeing Alert Service Bulletin 767-24A0085 dated 17 September 1992.\n\nIf Boeing Part Number S282T004-7 appears on the static inverter, then prior to further flight, replace the static inverter with an improved model and perform an operational test in accordance with the Boeing alert service bulletin.\n\n2. Static inverters, part number S282T004-7, may not be fitted as replacements in Boeing 767 series aircraft. Existing installations of part number S282T004-7 may remain in service until Requirement 1 is accomplished.\n\nNote: FAA AD 93-13-01 Amdt 39-8614 refers.\n\nCompliance: Requirement 1 \\- Unless previously accomplished, prior to 16 September 1994.\n\nRequirement 2 \\- With effect 16 September 1993.\n\nBackground: The FAA has received several reports of the loss of 115 volt AC electrical power to the standby bus during ground power transfer operations. Laboratory tests have confirmed that the static inverter S282T004-7 can shutdown during power transfer.\n\nCompliance with this Directive is intended to prevent shutdown of the static inverter during power transfer, which could result in the inability to restart the engines in the event of a dual engine flameout. The FAA compliance time is extended by approximately one month.","sortOrder":0}],"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive preserves the original safety scope—identify and remove static inverters with part number S282T004-7 and prevent their re-installation (Requirements 1–2). The only procedural divergence noted is an adjustment in compliance timing relative to the FAA AD (Background/Compliance), not a change to which aircraft or parts are covered."},"complexity_factors":["Narrow applicability: only Boeing 767 series aircraft identified in Boeing Alert Service Bulletin 767-24A0085 dated 17 September 1992 (Applicability).","Two prescriptive duties: inspect to determine part number and, if S282T004-7, replace and perform an operational test prior to further flight (Requirement 1).","Prohibition on refitting the defective part number as a replacement (Requirement 2).","Fixed compliance dates create scheduling constraints: Requirement 1 due prior to 16 September 1994; Requirement 2 effective 16 September 1993 (Compliance).","Procedural dependency on an external document (Boeing Alert Service Bulletin) for how to inspect, replace and test (Requirement 1/2).","Operational and cost implications for operators: parts replacement and post-replacement testing impose direct maintenance costs and downtime (Requirements 1–2).","Connection to an FAA directive (FAA AD 93-13-01) and a noted extension to FAA compliance time; cross-jurisdictional coordination may affect implementation timing (Note; Background).","Low regulator discretion: the AD prescribes specific actions and part numbers rather than delegating risk assessment to operators (Requirements 1–2)."],"plain_english_summary":"Mandates inspection of static inverters on specified Boeing 767s and replacement of any unit bearing part number S282T004-7 with an improved model before further flight; forbids fitting S282T004-7 as replacements after the effective date. It targets Boeing 767 operators and maintenance organisations. The rule aims to prevent inverter shutdown during ground power transfer that could impede engine restart after a dual engine flameout. Operators bear inspection, replacement and testing costs and must meet set compliance dates."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific identified defect in a specific aircraft component. It has not expanded beyond its original purpose of mandating replacement of a faulty static inverter part."},"complexity_factors":["Single, specific technical requirement with clear part number identification","Only 2 substantive requirements with straightforward conditional logic (if-then)","Minimal cross-referencing (one Boeing service bulletin, one FAA AD reference)","No defined terms section or interpretive provisions","Clear, fixed compliance dates with simple effective date structure","Background section provides plain explanation of safety rationale"],"plain_english_summary":"This CASA Airworthiness Directive for Boeing 767s requires inspection and replacement of a faulty static inverter and bans installation of part S282T004-7. It applies to all Boeing 767 operators in Australia covered by the referenced Boeing service bulletin.\n\nThe inverter can fail during ground power operations, risking loss of electrical power and preventing engine restart. Immediate ban from 16 Sept 1993; replacement required by 16 Sept 1994."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-72-static-inverter-replacement","history":"/api/acts/ad-b767-72-static-inverter-replacement/history","analysis":"/api/acts/ad-b767-72-static-inverter-replacement/analysis","conflicts":"/api/acts/ad-b767-72-static-inverter-replacement/conflicts","importantCases":"/api/acts/ad-b767-72-static-inverter-replacement/important-cases","documents":"/api/acts/ad-b767-72-static-inverter-replacement/documents"}}