{"id":"F2006B03417","name":"AD/B767/63 Amdt 4 - Thrust Reverser Control System","slug":"ad-b767-63-amdt-4-thrust-reverser-control-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42958,"registerId":"commonwealth-F2006B03417-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 767 Series Aeroplanes","sectionType":"part","heading":"Boeing 767 Series Aeroplanes","content":"# Boeing 767 Series Aeroplanes\n\nAD/B767/63 Amdt 4 (continued)","sortOrder":0},{"sectionNumber":"Terminating Action","sectionType":"part","heading":"Terminating Action","content":"# Terminating Action\n\nCompliance with the requirements of Requirement 4 of this Directive is terminating action for the tests/inspections specified in Requirement 1.\n\nNote: FAA AD 94-16-03 Amdt 39-8993 refers and supersedes FAA AD 92-03-03.\n\nCompliance: For Requirement 1: Unless previously accomplished, remains unchanged as prior to 20 July 1996.\n\nFor Requirement 2: At intervals not exceeding 3,000 flight hours since last test/inspection.\n\nFor Requirement 3 (a) or (b): Prior to further flight.\n\nFor Requirement 3 (c): Within 10 days after thrust reverser deactivation. For Requirement 3 (d) and (e): Prior to further flight.\n\nFor Requirement 4: Unless previously accomplished, remains unchanged as not later than 8 December 1999.\n\nThis Airworthiness Directive becomes effective on 31 October 2002.\n\nBackground: This amendment to the Directive includes numerous editorial changes that include changes to the structure of the requirements and compliance sections. These changes have no affect on the original technical requirements of this Directive. However, it should be noted that the MEL relief provisions have been modified to better amplify the requirements in this regard.\n\nThe actions specified in this amendment, and the original Directive, are intended to prevent possible discrepancies in the thrust reverser system that can result in an inadvertent in- flight deployment.\n\nPrevious amendments to this Directive were made to:\n\n    include reference to “maintenance action” for compliance with Requirement 1;\n    mandate the incorporation of thrust reverser synch-locks; and\n    introduce repetitive tests of the synch-lock system","sortOrder":1}],"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":6,"scope_assessment":{"changed":false,"description":"The amendment restructures and clarifies the Directive's requirements and compliance text (Background) and modifies MEL relief wording, but it states explicitly that these editorial changes do not alter the original technical requirements. The Directive also separates repetitive-function-test obligations into a distinct AD (AD/B767/89 Amdt 1), changing administrative allocation but not the substantive safety scope."},"complexity_factors":["Multiple, differing compliance timings and conditions (e.g. Requirement 1 unchanged until 20 Jul 1996; Requirement 2: intervals ≤3,000 flight hours; Requirements 3(a)/(b) prior to further flight; 3(c) within 10 days after deactivation; 3(d)/(e) prior to further flight; Requirement 4 by 8 Dec 1999) — source: 'Compliance:' section.","Terminology and structure were edited without changing technical substance, producing potential interpretive risk for implementers (Background: editorial changes with no effect on original technical requirements).","MEL relief wording was modified to 'better amplify' obligations, changing administrative compliance interpretation though not the technical mandate (Background: MEL relief provisions modified).","Cross-reference to FAA ADs (FAA AD 94-16-03 supersedes FAA AD 92-03-03) and linkage to a separate AD for repetitive tests (AD/B767/89 Amdt 1) creates interdependent obligations across instruments.","Presence of a formal 'terminating action' that cancels prior test/inspection requirements once accomplished adds sequencing complexity (Terminating Action section).","Multiple amendment history and effective dates (original 1992, amendments 1995, 1996, this amendment effective 31 Oct 2002) requires operators to track which actions remain outstanding.","Enforcement and final authority are vested in CASA's Delegate (signature and notice dates provided), concentrating discretion in regulator for approval and interpretation (signature: James Coyne; Gazette notice date).","Operational burden falls on aircraft operators and maintenance organisations (who fund and schedule inspections, tests and hardware installations); costs are recurrent where tests are repetitive (implied by 'repetitive tests' and interval requirements)."],"plain_english_summary":"This Directive requires Boeing 767 operators and maintenance organisations to carry out specified inspections, tests and hardware changes to the thrust reverser control system (including incorporation of synch-locks and repetitive function tests) to reduce the risk of inadvertent in‑flight deployment. It prescribes deadlines, recurring intervals and a terminating action, and modifies how MEL relief is described. Operators pay for and schedule the work; CASA (the Delegate) enforces compliance."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This amendment explicitly states it makes 'numerous editorial changes' and structural reorganizations only, with 'no affect on the original technical requirements.' The scope remains limited to thrust reverser safety on Boeing 767 aircraft, consistent with the original 1992 directive. The separation of repetitive testing into AD/B767/89 is described as an administrative convenience for maintenance control, not an expansion of scope."},"complexity_factors":["Multiple cross-references to other directives (AD/B767/89 Amdt 1, FAA AD 94-16-03, FAA AD 92-03-03)","Five separate requirements with different compliance deadlines and intervals (one-time, repetitive, conditional, and calendar-based deadlines)","Conditional logic: 'Unless previously accomplished', 'Prior to further flight', 'Within 10 days after thrust reverser deactivation'","Fragmented structure with repeated headers and 'continued' sections suggesting this is extracted from a larger document","Technical aviation terminology requiring domain knowledge (MEL relief, synch-locks, thrust reverser deactivation)","Historical amendment tracking (references to Amendments 2, 3, and original 1992 issue)"],"plain_english_summary":"This AD mandates inspections, recurrent testing and modification of Boeing 767 thrust reverser control systems to prevent accidental in‑flight deployment — including retrofit of additional locking (synch‑lock) hardware and limits on dispatch with unserviceable reversers. It affects Australian operators and maintenance crews responsible for 767s.\n\nAmendment 4 (effective 31 Oct 2002) is editorial/structural only (no technical change) and clarifies MEL relief and testing recordkeeping."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-63-amdt-4-thrust-reverser-control-system","history":"/api/acts/ad-b767-63-amdt-4-thrust-reverser-control-system/history","analysis":"/api/acts/ad-b767-63-amdt-4-thrust-reverser-control-system/analysis","conflicts":"/api/acts/ad-b767-63-amdt-4-thrust-reverser-control-system/conflicts","importantCases":"/api/acts/ad-b767-63-amdt-4-thrust-reverser-control-system/important-cases","documents":"/api/acts/ad-b767-63-amdt-4-thrust-reverser-control-system/documents"}}